Download or read book High Strength and Thermally Stable Nanostructured Magnesium Alloys and Nanocomposites written by Yuan-Wei Chang and published by . This book was released on 2015 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium and its alloys are currently in the spotlight of global research because of the need to limit energy consumption and reduce the environmental impact. In particular, their low densities compared to other structural metals make them a very attractive alternative in the automobile and aerospace industries. However, their low strength compared to other structural materials (e.g. Al and steels) has limited their widespread application. This dissertation presents the results of developing and investigation of a high strength nanostructured magnesium-aluminum alloy and composite. The nanostructured magnesium alloy is prepared by cryomilling and consolidated by spark-plasma-sintering. Focused ion beam is used to prepare micropillars with different diameters ranging from 1.5 to 8 μm and micro-compression test is conducted by nanoindenter in order to evaluate the mechanical properties. The yield strength obtained in the present study is around three times higher than conventional magnesium alloys (120 MPa vs. 370 MPa). The yield strength of the nanostructured magnesium alloy is further improved through hot extrusion, resulting in a yield strength of 550 MPa and an ultimate strength of 580 MPa. The nanostructured magnesium alloy exhibits a strong size-dependence, and a significant improvement in strength is observed when the pillar diameter is reduced to below 3.5 μm. The deformation mechanisms of the compressed pillars were characterized using transmission electron microscopy. The size-induced strengthening is attributed to a less number of dislocation sources along with a higher activity of non-basal deformation mechanisms. We have also developed a high strength and thermally stable nanostructured magnesium composite by adding diamantane. A yield strength of 500 MPa is achieved, moreover, excellent thermal stability is demonstrated in the magnesium alloy containing diamantanes. The strength and grain size are thermally stable after annealing at 400°C for 100 hours. In contrast, the yield strength of the alloy without diamantanes decreases significantly after annealing due to severe grain growth. These results suggest that diamantanes are pinning the grain boundaries and inhibiting grain growth at elevated temperatures. Finally, molecular dynamics simulations and finite element analysis are used to explore the deformation mechanisms of magnesium with different grain sizes at atomic resolutions and correct tapering effect on micro-compression test, respectively. The results in the dissertation show that nanostructured Mg-Al alloy and Mg-Al-Diamantane composite are promising materials for aerospace and automobile industries.

Download or read book Aluminum and Magnesium Metal Matrix Nanocomposites written by Lorella Ceschini and published by Springer. This book was released on 2016-10-18 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book looks into the recent advances in the ex-situ production routes and properties of aluminum and magnesium based metal matrix nanocomposites (MMNCs), produced either by liquid or semi-solid state methods. It comprehensively summarizes work done in the last 10 years including the mechanical properties of different matrix/nanoreinforcement systems. The book also addresses future research direction, steps taken and missing developments to achieve the full industrial exploitation of such composites. The content of the book appeals to researchers and industrial practitioners in the area of materials development for metal matrix nanocomposites and its applications.

Download or read book Fundamental Study of Nanoparticles Enabled High Performance Copper written by Gongcheng Yao and published by . This book was released on 2020 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: High performance (hardness, strength, electrical/thermal conductivity, ductility, Young's modulus, and corrosion resistance, etc.) copper (Cu) based materials are in strong demand in industry for numerous applications. However, it has been a long-standing challenge to achieve high performance Cu by scalable and cost-effective fabrication due to the limits of traditional metallurgy. Pure Cu is very soft and improving the mechanical properties of Cu comes at great expense of electrical and thermal conductivity. The properties of traditional Cu alloys have reached certain limits. Nanotechnology enabled metallurgy provides a new pathway to achieve significant performance enhancement of Cu. The overarching goal of this dissertation is to advance the fundamental understanding of nanoparticle effects on micro/nano-structures and properties of Cu/Cu alloys, thereby overcoming the existing limits of Cu/Cu alloys. The specific research objectives are to develop effective processing methods to synthesize and disperse suitable nanoparticles in Cu/Cu alloys and to break the limits of grain refinement, phase modification, and property enhancement in Cu/Cu alloys by nanoparticles.Two ex-situ processing methods were utilized to fabricate Cu matrix nanocomposites with a wide volume fraction range of well-dispersed nanoparticles. To enable the size control of the nanoparticles and expand the choices of nanoparticles for Cu/Cu alloys, novel in-situ synthesis of nanoparticles and Cu matrix nanocomposites were developed. In-situ TiB2 nanoparticles with an average size of 65 nm in the Cu matrix were synthesized using fluoride salts as precursors and Al as the reduction agent via casting. It was also discovered that Al in molten Cu can stabilize TiB2 nanoparticles. This finding overcame the challenge of incorporating TiB2 nanoparticles into molten Cu. In addition, Cu with in-situ W nanoparticles (average size as small as 132.7 nm) was cast using tungsten oxide microparticles as the precursor. Cu/WC nanocomposites can exhibit simultaneously enhanced microhardness, strength, and Young's modulus without significant degradation of the electrical/thermal conductivity. The as-solidified Cu/40 vol.% WC showed a yield strength over 1000 MPa, a Young's modulus over 250 GPa, and still maintained reasonable electrical and thermal conductivity. In addition, a CuAlMg/TiB2 nanocomposite was designed and fabricated by casting. Results showed that TiB2 nanoparticles effectively increased the hardness while causing less deterioration of the electrical conductivity compared to alloying of Al and Mg. Nanoparticle-enabled grain modification was investigated. Bimodal grain structure has been demonstrated effective to overcome the strength-ductility tradeoff in nanostructured materials. We report a new and scalable method to fabricate bimodal grained metals, i.e., casting followed by regular hot rolling, when the metals are loaded with nanoparticles. After hot rolling, as WC nanoparticles restricted grain growth, the nanoparticle-rich zones retained ultrafine grains, while the grains in the nanoparticle-sparse zones grew to microscale. This new pathway has great potential to advance the scalable manufacturing of bimodal grained metals for various applications. In addition, it was discovered that microparticles (CrB and CrB2) with surface nanofeatures can enable ultrafine/nanograined Cu via slow cooling. CrB/CrB2 microparticles, formed by coalescence of nanoparticles in Cu matrix, displayed surface nanofeatures, which induced substantial grain refinement and stabilization down to the ultrafine/nanoscale. The UFG Cu/CrB and Cu/CrB2 samples exhibit exceptional thermal stability, comparable to UFG Cu induced by nanoparticles, without coarsening after annealing at 600 C for 1 h. The nanoparticle enabled phase modification in Cu alloys was studied targeting the intermetallic phase, the solid solution, and the precipitates, which potentially offers a profound impact on alloy design. High-Al bronze (Cu-14Al) has high hardness, wear resistance, but extremely low ductility, resulted from the brittle intermetallic phases especially at the grain boundaries. Nanoparticles tuned the morphology and distribution of the intermetallic phases, effectively increasing ductility. In addition, Cu-4Al is a corrosion-resistant alloy, comprised of Al solid solution in Cu. Dispersed TiB2 nanoparticles not only significantly increased its hardness and modulus, but also mitigated the intergranular corrosion, which is anticipated to arise from the reduced grain boundary energy of serrated grain boundaries in the nanocomposite sample and the partially blocked dealumination by nanoparticles at the grain boundaries. For many alloys, bulky and brittle intermetallic phases are detrimental to their properties, and the refinement of those phases is considered a long-time challenge. Here, we show that nanoparticles can modify and refine such intermetallics to the ultrafine/nanoscale during solidification. Cu-ZrCuSi pseudo-binary alloy was nano-treated by WC nanoparticles. Significant morphology transformation and refinement of ZrCuSi down to the ultrafine/nanoscale was achieved upon the addition of 4 vol.% WC nanoparticles, which arose from the nanoparticle-enabled phase control during solidification. The CuZrSi alloy with 4 vol.% WC nanoparticles exhibit simultaneously enhanced hardness, strength, and plasticity over pure CuZrSi. Cu-Cr alloys are a class of high-strength high-conductivity Cu alloys. However, the strength of Cu-Cr alloys by precipitation-hardening has reached a certain limit. Cu-Cr alloy containing W nanoparticles was fabricated. W nanoparticles accelerated the precipitation, leading to a significant reduction in the peak-aging time. Moreover, the nano-treated sample exhibit increased peak microhardness and improved thermal stability. Thus, nano-treating the Cu-Cr alloys is promising to break the limits of current Cu-Cr alloys. In summary, this dissertation has demonstrated the effectiveness of dispersing nanoparticles into Cu/Cu alloys to achieve high performance Cu. First, nanoparticles with suitable volume fractions can effectively enhance the mechanical properties without significantly deteriorating the electrical/thermal properties of pure Cu. Second, nanoparticles can modify the grain structures of Cu during solidification, enabling bimodal grained and ultrafine grained Cu. Third, nanoparticles can enable Cu alloys with much improved properties by refining intermetallics to ultrafine/nanoscale (CuZrSi alloy), enhancing aging behavior (Cu-Cr alloy), mitigating intergranular corrosion (Cu-4Al), and modifying the morphology and distribution of the brittle phases to improve ductility (Cu-14Al). This approach breaks the limits of traditional liquid metallurgy and lays a foundation for the rational design of high performance metals with dispersed nanoparticles for widespread applications.

Download or read book Development of a Thermally Stable Magnesium Based Bulk Nanocomposite written by Jacob William Stremfel and published by . This book was released on 2018 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium has the potential to become an indispensable structural material alongside aluminum due to its low density. However, magnesium is currently held back in its use as a result of its low strength and poor ductility with relatively limited structural applications. This dissertation presents the results for a processing route that was used to achieve a high-strength and thermally stable magnesium-based bulk nanocomposite in order to increase the applicability of magnesium-based alloys. This processing route included the gas atomization of Mg-4Y-3RE (WE43) powders which were treated by cryomilling (mechanical ball milling in liquid nitrogen) followed by consolidation by spark plasma sintering (SPS) in order to obtain a bulk material. The resulting bulk nanocomposite consisted of approximately 15-20% by volume fraction of extremely fine MgO nanoparticles/grains (

Download or read book Magnesium written by Ron Legarski and published by SolveForce. This book was released on 2024-09-22 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Magnesium: From Discovery to Modern Energy Applications" is an in-depth exploration of one of the most versatile and essential elements in modern technology and industry. This comprehensive guide takes readers on a journey from magnesium’s early discovery and historical significance to its transformative role in advanced manufacturing, sustainable energy, and cutting-edge technology today. Magnesium’s unique properties—its lightweight strength, biocompatibility, and recyclability—make it a critical material across numerous industries. In this book, author Ron Legarski dives deep into magnesium's applications in aerospace, automotive, electronics, medical devices, and renewable energy, illustrating how this remarkable element is driving innovation and shaping the future of materials science. Key topics covered include: The history of magnesium and its evolution into a key material in modern industry. Advances in magnesium alloys and their role in lightweighting for automotive and aerospace sectors. Magnesium-based batteries and their potential to revolutionize energy storage. The use of magnesium in biodegradable medical implants and other biomaterials. How magnesium recycling and sustainable practices are contributing to a circular economy. Future trends in additive manufacturing, nanotechnology, and nuclear energy involving magnesium. Rich with scientific research, technical data, and real-world case studies, this book offers valuable insights for engineers, material scientists, policy makers, and industry leaders alike. Whether you are looking to harness magnesium’s potential for sustainability or to stay ahead of the curve in technological advancements, this book will serve as both a reference and an inspiration. Ron Legarski, a telecommunications expert and President of SolveForce, brings his extensive experience in network infrastructure, manufacturing technologies, and sustainable solutions to this definitive work on magnesium. Through clear explanations and detailed examples, he reveals how magnesium is paving the way for innovative and environmentally conscious solutions across industries. Whether you're involved in manufacturing, energy, medicine, or simply curious about the future of materials science, "Magnesium: From Discovery to Modern Energy Applications" will provide the knowledge and insights needed to understand and leverage one of the world’s most impactful materials.

Download or read book Nanostructured Metals and Alloys written by S H Whang and published by Elsevier. This book was released on 2011-03-22 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tensile strength, fatigue strength and ductility are important properties of nanostructured metallic materials, which make them suitable for use in applications where strength or strength-to-weight ratios are important. Nanostructured metals and alloys reviews the latest technologies used for production of these materials, as well as recent advances in research into their structure and mechanical properties.One of the most important issues facing nanostructured metals and alloys is how to produce them. Part one describes the different methods used to process bulk nanostructured metals and alloys, including chapters on severe plastic deformation, mechanical alloying and electrodeposition among others. Part two concentrates on the microstructure and properties of nanostructured metals, with chapters studying deformation structures such as twins, microstructure of ferrous alloys by equal channel angular processing, and characteristic structures of nanostructured metals prepared by plastic deformation. In part three, the mechanical properties of nanostructured metals and alloys are discussed, with chapters on such topics as strengthening mechanisms, nanostructured metals based on molecular dynamics computer simulations, and surface deformation. Part four focuses on existing and developing applications of nanostructured metals and alloys, covering topics such as nanostructured steel for automotives, steel sheet and nanostructured coatings by spraying.With its distinguished editor and international team of contributors, Nanostructured metals and alloys is a standard reference for manufacturers of metal components, as well as those with an academic research interest in metals and materials with enhanced properties.

Download or read book Ultrafine Grained Materials written by Ruslan Z. Valiev and published by Springer Nature. This book was released on with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnesium Alloys Structure and Properties written by Tomasz Arkadiusz Tański and published by BoD – Books on Demand. This book was released on 2022-03-23 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium Alloys Structure and Properties is a comprehensive overview of the latest knowledge in the field of magnesium alloys engineering. Modern magnesium alloys are promising for a variety of applications in many branches of the industry due to their excellent mechanical properties, high vibration, damping capacity, and high dimensional stability. This book discusses the production, processing, and application of magnesium alloys. It includes detailed information on the impact of alloying additives and selected casting technologies, as well as modern manufacturing technologies based on powder metallurgy, the production of composites and nano-composites with metal matrixes, and methods for improving alloy properties.

Download or read book Handbook of Nanoscience Engineering and Technology written by William A. Goddard III and published by CRC Press. This book was released on 2018-09-03 with total page 1075 pages. Available in PDF, EPUB and Kindle. Book excerpt: In his 1959 address, "There is Plenty of Room at the Bottom," Richard P. Feynman speculated about manipulating materials atom by atom and challenged the technical community "to find ways of manipulating and controlling things on a small scale." This visionary challenge has now become a reality, with recent advances enabling atomistic-level tailoring and control of materials. Exemplifying Feynman’s vision, Handbook of Nanoscience, Engineering, and Technology, Third Edition continues to explore innovative nanoscience, engineering, and technology areas. Along with updating all chapters, this third edition extends the coverage of emerging nano areas even further. Two entirely new sections on energy and biology cover nanomaterials for energy storage devices, photovoltaics, DNA devices and assembly, digital microfluidic lab-on-a-chip, and much more. This edition also includes new chapters on nanomagnet logic, quantum transport at the nanoscale, terahertz emission from Bloch oscillator systems, molecular logic, electronic optics in graphene, and electromagnetic metamaterials. With contributions from top scientists and researchers from around the globe, this color handbook presents a unified, up-to-date account of the most promising technologies and developments in the nano field. It sets the stage for the next revolution of nanoscale manufacturing—where scalable technologies are used to manufacture large numbers of devices with complex functionalities.

Download or read book Magnesium Based Nanocomposites Advances and Applications written by Sankaranarayanan Seetharaman and published by IOP Publishing Limited. This book was released on 2020-11-10 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium-Based Nanocomposites: Advances and applications covers the most recent advances in the processing and properties of magnesium-based nanocomposites, which are a class of lightweight sustainable materials with the potential to be revolutionary energy-saving materials and a range of beneficial applications. It provides a complete picture of the materials, including their multi-faceted design and applications in technology, electronics, medicine, and the automotive and aerospace industries. The book will enable researchers and engineers, irrespective of their discipline, to better exploit the benefits of magnesium-based nanocomposites for multiple applications that can contribute significantly to the safe health of humans and the planet. It also acts as a guide for tailoring materials for targeted applications, and as useful supplementary reading for advanced courses on composites and nanocomposites. Key Features Covers the fundamental science and most recent advances in the processing and properties of magnesium-based nanocomposites across multiple fields of research Provides comprehensive coverage of material properties with emphasis on the effects of different types of nano-scale reinforcements Includes the multi-faceted design of the materials and their applications in technology, electronics, medicine, and the automotive and aerospace industries Acts as a guide for tailoring materials for targeted applications, and as supplementary reading for advanced courses on nanocomposites

Download or read book Nanoparticles Reinforced Metal Nanocomposites written by Santosh K. Tiwari and published by Springer Nature. This book was released on 2023-03-01 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent developments related to fabrication and utilization of nanoparticle-engineered metal matrices and their composites linked to the heavy industries, temperature fasteners, high-pressure vessels, and heavy turbines, etc. The mechanical properties of newly developed metallic composites are discussed in terms of tensile modulus, hardness, ductility, crack propagation, elongation, and chemical inertness. This book presents the design, development, and implementation of state-of-the-art methods linked to nanoparticle-reinforced metal nanocomposites for a wide variety of applications. Therefore, in a nutshell, this book provides a unique platform for researchers and professionals in the area of nanoparticle-reinforced metal nanocomposites.

Download or read book Thermal Stability Microstructures and Mechanical Properties of Nanostructured ultrafine Structured Cu 5vol Al2O3 Nanocomposites Fabricated by High Energy Mechanical Milling and Powder Compact Extrusion written by Dengshan Zhou and published by . This book was released on 2014 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnesium Magnesium Alloys and Magnesium Composites written by Manoj Gupta and published by John Wiley & Sons. This book was released on 2011-03-31 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: A look at the current and future uses of magnesium-based products and their role in the world's environmental and technological revolution The lightest of all structural metals, having one-fourth the density of steel and two-thirds that of aluminum, magnesium has already been adopted as an alternative construction material in applications as far ranging as automotive and sports equipment, electronics, and space technology. In a world concerned with minimizing the environmental impact of products, the choice of light-weight, energy-saving, and high-performance materials, like magnesium, would seem a small, significant step towards improving life on this planet. Magnesium, Magnesium Alloys, and Magnesium Composites introduces the science and current applications of this important metal, shedding light on the magnesium-based composites developed over the last fifteen years. Chapters include in-depth discussion of: The characteristics of pure magnesium—including atomic properties and crystal structure as well as physical, electrical, and mechanical properties Magnesium alloys—and the effects of the alloying elements, such as aluminum, lithium, copper, nickel, and silicon The properties of magnesium-based composites—and the effects of different types (metallic, ceramic, interconnected, and intermetallic) of reinforcements of varying length (from micron scale to nanometric length) Corrosion aspects of magnesium-based materials Magnesium-based products in medicine, sports equipment, and the automotive, aerospace, and electronics industries Bringing together, for the first time, the science, properties, and technologies relating to the current and future uses of magnesium, this important reference also offers readers a glimpse of a not-too-distant world in which environmental safety and sound engineering are a reality.

Download or read book Manufacturing Techniques for Materials written by T.S. Srivatsan and published by CRC Press. This book was released on 2018-04-09 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manufacturing Techniques for Materials: Engineering and Engineered provides a cohesive and comprehensive overview of the following: (i) prevailing and emerging trends, (ii) emerging developments and related technology, and (iii) potential for the commercialization of techniques specific to manufacturing of materials. The first half of the book provides the interested reader with detailed chapters specific to the manufacturing of emerging materials, such as additive manufacturing, with a valued emphasis on the science, technology, and potentially viable practices specific to the manufacturing technique used. This section also attempts to discuss in a lucid and easily understandable manner the specific advantages and limitations of each technique and goes on to highlight all of the potentially viable and emerging technological applications. The second half of this archival volume focuses on a wide spectrum of conventional techniques currently available and being used in the manufacturing of both materials and resultant products. Manufacturing Techniques for Materials is an invaluable tool for a cross-section of readers including engineers, researchers, technologists, students at both the graduate level and undergraduate level, and even entrepreneurs.

Download or read book Magnesium Technology 2011 written by Wim Sillekens and published by Springer. This book was released on 2016-12-10 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Magnesium Technology Symposium, which takes place every year at the TMS Annual Meeting & Exhibition, is one of the largest yearly gatherings of magnesium specialists in the world. Papers are presented in all aspects of the field, ranging from primary production to applications to recycling. Moreover, papers explore everything from basic research findings to industrialization. Magnesium Technology 2011 covers a broad spectrum of current topics, including alloys and their properties; cast products and processing; wrought products and processing; forming, joining, and machining; corrosion and surface finishing; ecology; and structural applications. In addition, you'll find coverage of new and emerging applications in such areas as biomedicine and hydrogen storage.

Download or read book Thermoelectric Energy Conversion written by Diana Davila Pineda and published by John Wiley & Sons. This book was released on 2017-08-22 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest volume in the well-established AMN series, this ready reference provides an up-to-date, self-contained summary of recent developments in the technologies and systems for thermoelectricity. Following an initial chapter that introduces the fundamentals and principles of thermoelectricity, subsequent chapters discuss the synthesis and integration of various bulk thermoelectric as well as nanostructured materials. The book then goes on to discuss characterization techniques, including various light and mechanic microscopy techniques, while also summarizing applications for thermoelectric materials, such as micro- and nano-thermoelectric generators, wearable electronics and energy conversion devices. The result is a bridge between industry and scientific researchers seeking to develop thermoelectric generators.

Download or read book Graphene Materials written by Ashutosh Tiwari and published by John Wiley & Sons. This book was released on 2015-04-20 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene Materials: Fundamentals and EmergingApplications brings together innovative methodologies withresearch and development strategies to provide a detailedstate-of-the-art overview of the processing, properties, andtechnology developments of graphene materials and theirwide-ranging applications. The applications areas covered arebiosensing, energy storage, environmental monitoring, andhealth. The book discusses the various methods that have been developedfor the preparation and functionalization of single-layeredgraphene nanosheets. These form the essential building blocks forthe bottom-up architecture of various graphene materials becausethey possess unique physico-chemical properties such as largesurface areas, good conductivity and mechanical strength, highthermal stability and desirable flexibility. The electronicbehavior in graphene, such as dirac fermions obtained due to theinteraction with the ions of the lattice, has led to the discoveryof novel miracles like Klein tunneling in carbon-based solid statesystems and the so-called half-integer quantum Hall effect. Thecombination of these properties makes graphene a highly desirablematerial for applications. In particular, Graphene Materials: Fundamentals and EmergingApplications has chapters covering: • Graphene and related two-dimensional nanomaterials • Surface functionalization of graphene • Functional three-dimensional graphene networks • Covalent graphene-polymer nanocomposites • Magnesium matrix composites reinforced with graphenenanoplatelets • Graphene derivatives for energy storage • Graphene nanocomposite for high performance supercapacitors • Graphene nanocomposite-based bulk hetro-junction solar cells • Graphene bimetallic nanocatalysts foam for energy storage andbiosensing • Graphene nanocomposites-based for electrochemical sensors • Graphene electrodes for health and environmental monitoring