Download or read book Processing Microstructure Evolution and Properties of Nanoscale Aluminum Alloy written by and published by . This book was released on 2005 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, phase transformations and precipitation behavior of Al-Cu nanoparticles were first studied. The nanoparticles were synthesized by a Plasma Ablation process and found to contain a 2- 5 nm thick adherent aluminum oxide scale, which prevented further oxidation. On aging, a precipitation sequence consisting of, nearly pure Cu precipitates to the metastable theta prime to equilibrium theta was observed. The structure of theta prime and its interface with the Al matrix has been characterized. Ultrafine Al-Cu nanoparticles (5-25 nm) were also synthesized by inert gas condensation and their aging behavior was studied. These particles were found to be quite stable against precipitation. Secondly, pure Al nanoparticles were prepared by the Exploding Wire process and their sintering and consolidation behavior were studied. It was found that Al nanopowders could be processed to bulk structures with high hardness and density. Sintering temperature was found to have a dominant effect on density, hardness and microstructure. Sintering at temperatures>600 degree C led to breakup of the oxide scale, leading to an interesting nanocomposite composed of 100-200 nm Al oxide dispersed in a bimodal nanometer-micrometer size Al matrix grains. And the randomly dispersed oxide fragments were quite effective in pinning the Al grain boundaries, preventing excessive grain growth and retaining high hardness. Cold rolling and hot rolling were effective methods for attaining full densification and high hardness. Thirdly, the microstructure evolution and mechanical behavior of Al-Al2O3 nanocomposites were studied. The composites can retain high strength at elevated temperature and thermal soaking has practically no detrimental effect on strength. Although the ductility of the composite remains quite low, there was substantial evidence for high localized plasticity. The strengthening mechanisms of the composite include: Orowan strengthening, grain size strengthening and forest strengthening. Finally, the microstructure evolution and mechanical behavior of 2024Al-Al2O3 nanocomposites were studied. This 2024Al-Al2O3 composite exhibits similar thermal stability and high strength at elevated temperature as Al-Al2O3. On ageing, the matrix of 2024Al-Al2O3 composites revealed a precipitation sequence of: alpha-Al to GP/GPB to Stheta prime/S prime to theta/S. The strengthening mechanisms of the 2024Al-Al2O3 composites include precipitation strengthening, Orowan strengthening, grain size strengthening and Forest strengthening.

Download or read book Magnesium Alloys Containing Rare Earth Metals written by L.L. Rokhlin and published by CRC Press. This book was released on 2003-02-20 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium-based alloys containing rare-earth metals are important structural materials, as they combine low density with high-strength properties. This makes them particularly attractive for industry, especially in cases where the low weight of constructions is critical, as in aircraft and space apparatus construction. One of the remarkable feature

Download or read book Microstructural Evolution in the 2219 Aluminum Alloy During Severe Plastic Deformation written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous investigations have demonstrated that intense plastic deformation is an attractive procedure for producing an ultrafine grain size in metallic materials. Torsional deformation under high pressure and equal-channel angular extrusion are two techniques that can produce microstructures with grain sizes in the submicrometer and nanometer range. Materials with these microstructures have many attractive properties. The microstructures formed by these two processing techniques are essentially the same and thus the processes occurring during deformation should be the same. Most previous studies have examined the final microstructures produced as a result of severe plastic deformation and the resulting properties. Only a limited number of studies have examined the evolution of microstructure. As a result, some important aspects of ultra-fine grain formation during severe plastic deformation remain unknown. There is also limited data on the influence of the initial state of the material on the microstructural evolution and mechanisms of ultra-fine grain formation. This limited knowledge base makes optimization of processing routes difficult and retards commercial application of these techniques. The objective of the present work is to examine the microstructure evolution during severe plastic deformation of a 2219 aluminum alloy. Specific attention is given to the mechanism of ultrafine grain formation as a result of severe plastic deformation.

Download or read book Additive Friction Stir Deposition written by Hang Z. Yu and published by Elsevier. This book was released on 2022-07-19 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive Friction Stir Deposition is a comprehensive summary of the state-of-the-art understanding on this emerging solid-state additive manufacturing technology. Sections cover additive friction stir deposition, encompassing advances in processing science, metallurgical science and innovative applications. The book presents a clear description of underlying physical phenomena, shows how the process determines the printing quality, covers resultant microstructure and properties in the as-printed state, highlights its key capabilities and limitations, and explores niche applications in repair, cladding and multi-material 3D printing. Serving as an educational and research guide, this book aims to provide a holistic picture of additive friction stir deposition-based solid-state additive manufacturing as well as a thorough comparison to conventional beam-based metal additive manufacturing, such as powder bed fusion and directed energy deposition. - Provides a clear process description of additive friction stir deposition and highlights key capabilities - Summarizes the current research and application of additive friction stir deposition, including material flow, microstructure evolution, repair and dissimilar material cladding - Discusses future applications and areas of research for this technology

Download or read book Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys written by Nabeel Hussain Alharthi and published by . This book was released on 2011 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The understanding of the microstructure evolution during the deformation processes is very important to predict the mechanical properties of the deformed workpiece. In the present work two aluminum alloys from different series were studied in two different deformation processes.

Download or read book A Handbook of Lattice Spacings and Structures of Metals and Alloys written by William B.. Pearson and published by . This book was released on 1964 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aluminium Alloys written by Subbarayan Sivasankaran and published by BoD – Books on Demand. This book was released on 2017-12-21 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major issue of energy saving and conservation of the environment in the world is being emphasized to us to concentrate on lightweight materials in which aluminium alloys are contributing more in applications in the twenty-first century. Aluminium and its related materials possess lighter weight, considerable strength, more corrosion resistance and ductility. Especially from the past one decade, the use of aluminium alloys is increasing in construction field, transportation industries, packaging purposes, automotive, defence, aircraft and electrical sectors. Around 85% is being used in the form of wrought products, which replace the use of cast iron. Further, the major features of aluminium alloy are recyclability and its abundant availability in the world. In general, aluminium and its related materials are being processed via casting, drawing, forging, rolling, extrusion, welding, powder metallurgy process, etc. To improve the physical and mechanical properties, scientists are doing more research and adding some second-phase particles in to it called composites in addition to heat treatment. Therefore, to explore more in this field, the present book has been aimed and focused to bridge all scientists who are working in this field. The main objective of the present book is to focus on aluminium, its alloys and its composites, which include, but are not limited to, the various processing routes and characterization techniques in both macro- and nano-levels.

Download or read book Microstructural Evolution and Mechanical Properties of Cryomilled Nanograined Al 5083 Alloy During Deformation Processing written by Michael K. Apemah and published by . This book was released on 2012 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Light Weight Alloys written by Maurizio Vedani and published by MDPI. This book was released on 2020-05-22 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is growing interest in light metallic alloys for a wide number of applications owing to their processing efficiency, processability, long service life, and environmental sustainability. Aluminum, magnesium, and titanium alloys are addressed in this Special Issue, however, the predominant role played by aluminum. The collection of papers published here covers a wide range of topics that generally characterize the performance of the alloys after manufacturing by conventional and innovative processing routes.

Download or read book Processing Microstructure and Mechanical Properties of Silicon Carbide Particulate Reinforced Aluminum Alloys written by Chikara Fujiwara and published by . This book was released on 1986 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microstructure Evolution During Extrusion of AA3xxx Aluminum Alloys written by Geng Yuanyuan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal Matrix Composites by Friction Stir Processing written by Ranjit Bauri and published by Butterworth-Heinemann. This book was released on 2017-08-10 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Matrix Composites by Friction Stir Processing discusses the capabilities of utilizing friction stir processing (FSP) as a tool to manufacture new materials, such as composites. FSP is considered a tool for grain refinement. However, this work illustrates how FSP has a wider capability due to the material flow and mixing the process offers. This book highlights such aspects by demonstrating the ability of the process to incorporate a second phase and make metal matrix composites (MMCs). The book covers the current research on processing MMCs by FSP, and presents a novel approach of making ductile MMCs by FSP using metal particle reinforcements. - Demonstrates how friction stir processing can be used to make metal matrix composites - Includes a review of different approaches of making metal matrix composites by friction stir processing - Demonstrates the utility of friction stir processing in making new types of non-equilibrium ductile composites - Provides a comparison of properties of friction stir processed composites to those of conventional metal matrix composites

Download or read book Solidification and Crystallization Processing in Metals and Alloys written by Hasse Fredriksson and published by John Wiley & Sons. This book was released on 2012-07-02 with total page 837 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solidification and Crystallization Processing in Metals and Alloys Hasse Fredriksson KTH, Royal Institute of Technology, Stockholm, Sweden Ulla Åkerlind University of Stockholm, Sweden Solidification or crystallization occurs when atoms are transformed from the disordered liquid state to the more ordered solid state, and is fundamental to metals processing. Conceived as a companion volume to the earlier works, Materials Processing during Casting (2006) and Physics of Functional Materials (2008), this book analyzes solidification and crystallization processes in depth. Starting from the thermodynamic point of view, it gives a complete description, taking into account kinetics and mass transfer, down to the final structure. Importantly, the book shows the relationship between the theory and the experimental results. Topics covered include: Fundamentals of thermodynamics Properties of interfaces Nucleation Crystal growth - in vapours, liquids and melts Heat transport during solidification processes Solidification structures - faceted, dendritic, eutectic and peritectic Metallic glasses and amorphous alloy melts Solidification and Crystallization Processing in Metals and Alloys features many solved examples in the text, and exercises (with answers) for students. Intended for Masters and PhD students as well as researchers in Materials Science, Engineering, Chemistry and Metallurgy, it is also a valuable resource for engineers in industry.

Download or read book Sintering of Advanced Materials written by Zhigang Zak Fang and published by Elsevier. This book was released on 2010-09-27 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sintering is a method for manufacturing components from ceramic or metal powders by heating the powder until the particles adhere to form the component required. The resulting products are characterised by an enhanced density and strength, and are used in a wide range of industries. Sintering of advanced materials: fundamentals and processes reviews important developments in this technology and its applicationsPart one discusses the fundamentals of sintering with chapters on topics such as the thermodynamics of sintering, kinetics and mechanisms of densification, the kinetics of microstructural change and liquid phase sintering. Part two reviews advanced sintering processes including atmospheric sintering, vacuum sintering, microwave sintering, field/current assisted sintering and photonic sintering. Finally, Part three covers sintering of aluminium, titanium and their alloys, refractory metals, ultrahard materials, thin films, ultrafine and nanosized particles for advanced materials.With its distinguished editor and international team of contributors, Sintering of advanced materials: fundamentals and processes reviews the latest advances in sintering and is a standard reference for researchers and engineers involved in the processing of ceramics, powder metallurgy, net-shape manufacturing and those using advanced materials in such sectors as electronics, automotive and aerospace engineering. - Explores the thermodynamics of sintering including sinter bonding and densification - Chapters review a variety of sintering methods including atmosphere, vacuum, liquid phase and microwave sintering - Discusses sintering of a variety of materials featuring refractory metals, super hard materials and functionally graded materials

Download or read book Modeling of Microstructure Evolution in Thermo mechanical Processing of Metals written by Qiang Yu and published by . This book was released on 2003 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analytical Characterization of Aluminum Steel and Superalloys written by D. Scott MacKenzie and published by CRC Press. This book was released on 2005-10-10 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: This one-of-a-kind reference examines conventional and advanced methodologies for the quantitative evaluation of properties and characterization of microstructures in metals. It presents methods for uncovering valuable information including precipitate mechanisms, kinetics, stability, crystallographic orientation, the effects of thermo-mechanical p