Download or read book Fatigue Properties of Magnesium Alloy Forgings written by Evan Henry Schuette and published by . This book was released on 1960 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Properties of Magnesium Alloys written by Charles Moosbrugger and published by ASM International. This book was released on 2017-11-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnesium and magnesium alloys provide unique properties for engineering applications. Magnesium alloys are popular as a structural material because of their combination of light weight and strength. They are desirable for portable tools, appliances, electronic devices, airplanes, space vehicles, and land transportation. This book is written for engineers, scientists, teachers, and students engaged in the design process of material selection and material elimination. While focused on mechanical properties for structural design, the physical properties that are germane to corrosion behavior and electrical applications are represented. Two-thirds of the book is devoted to datasheets for individual alloys which provide a handy quick reference to specific properties and performance. The remainder of the book addresses topics common to all magnesium alloys such as the alloy designation system and product forms. Casting alloys and wrought alloys are compared. The alloy performance at elevated temperature is presented, as are fatigue properties. Finally, a summary of the corrosion behavior of selected alloys is discussed along with how these corrosion mechanisms can be applied for beneficial results.
Download or read book Fatigue of Forged AZ80 Magnesium Alloy written by Andrew Gryguć and published by . This book was released on 2019 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of research surrounding the fatigue of Mg alloys generally exhibits a rigid dichotomy between theoretical and applied contributions. This research work addresses both of these domains of the field from a more holistic sense, yet still remains highly detail oriented. Automotive suspension components generally have complex geometries and undergo highly multiaxial loading. This is partly due to the packaging constraints imposed by the many dynamic systems within a vehicle, and the impetuous towards lightweighting to improve efficiency and reduce greenhouse gas emissions. As such, the current optimal solution for such a component typically a complex shape made from a material with high specific strength. Both forging and casting lend themselves to facilitating large scale production of such components using industrially compatible processes. Forging however produces a product with attributes which are more optimally suited for advanced vehicle lightweighting applications. Of the commercially available Mg alloys, the AZ80 alloy is a Mg alloy with good forgeability, a high aluminium content, and superior strength. However the fatigue properties of this alloy are largely unknown, especially in complex multiaxial loading paths such as which automotive suspension components undergo. This thesis acts to fill this gap in knowledge, by providing the foundation for the understanding of the complex cyclic behavior of forged AZ80 Mg, as well as predicting its fatigue life to ensure the satisfaction and safety of the end consumer. Various small scale forging methods were investigated and characterized in such a way that it one can connect them to the larger scale component in the engineering application. Two varieties of base material were selected to be forged into these small scale forgings, cast and extruded. Furthermore, an understanding was developed on the influence of material texture on the cyclic deformation mechanism and resulting fatigue life. The implications of multiaxial loading on the fatigue behaviour was also characterized as well as the effect of nonproportional loading. A variety of different models were utilized to reliably predict the fatigue life of forged AZ80 Mg in both simple uniaxial and complex non-proportional bi-axial loading paths. The culmination of all of these research objectives enabled effective utilization of forged AZ80 Mg as a lightweight material for a variety of different fatigue critical engineering applications. It was concluded that the thermomechanical history imparted to the material via forging resulted in a texture intensification and a rotation of the crystallographic cells to align with the loading direction during forging. Secondly, following forging, both the cast-forged and extruded-forged material exhibited an significant increase in fatigue life. It was also discovered that the style of closed-die forging being investigated had spatially varying properties with texture orientations which varied based on the local forging directions and intensities which were dependent on the starting texture as well as thevi thermomechanical history. Furthermore, following characterization of the materials behaviour over a variety of different loading paths, the biaxial fatigue response is somewhat dominated by the axial component and the non-proportional effect to be detrimental to the fatigue life. Finally, it was concluded that the optimal forging condition tends towards the coldest temperature and fastest strain rate which are pragmatically possible (within the context of warm forging) that produce a forging free of defects and of high quality. This optimal condition corresponded to extruded AZ80 Mg forged at a temperature of 250°C and 20 mm/sec.
Download or read book Fatigue Properties of Magnesium Alloys and Structures written by L. R. Jackson and published by . This book was released on 1944 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report on Fatigue Properties of Magnesium Alloys and Structures Fatigue Properties of Magnesium Alloy Sheet Part I NA 145 written by L. R. Jackson and published by . This book was released on 1943 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress Report on Fatigue Properties of Magnesium Alloys and Structures written by Howard W. Russell and published by . This book was released on 1943 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report on Fatigue Properties of Magnesium Alloys and Structures Fatigue Properties of Magnesium Alloy Sheet Part II NA 145 written by L. R. Jackson and published by . This book was released on 1944 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Data Book written by ASM International and published by ASM International. This book was released on 1994-12-31 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of the Quasi static and Fatigue Behavior of Forged AZ31B Magnesium Alloy written by Dwayne Toscano and published by . This book was released on 2018 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light-weighting is being aggressively targeted by automotive manufacturers as a method to reduce emissions. Magnesium (Mg) alloys due to their low density and high specific strength have therefore gained significant interest for automotive applications. As cyclic loading is a major concern for load-bearing automotive components, this thesis aims to characterize the fatigue response of AZ31B Mg alloy that may be forged to its final component geometry. Initially, the effect of open die forging on cast AZ31B alloy was investigated. A partially refined microstructure with strong basal texture was developed in forged material. Tensile yield and ultimate strengths increased by a remarkable 143 percent and 23 percent respectively whereas the compressive yield strength was unchanged owing to the activation of extension twins for both conditions. Nevertheless, the ultimate compressive strength for the forged material increased by 22 percent compared to the as-cast material. The influence of open-die forging on the low cycle fatigue (LCF) behavior of cast AZ31B was also investigated. The forged material was generally found to exhibit longer fatigue life and also achieved significantly higher stresses at the same level of total strain amplitude compared to cast AZ31B. The Smith-Watson-Topper (SWT) model and Jahed-Varvani (JV) energy model were employed and both models accurately predicted the experimentally obtained fatigue life of both cast and forged alloy conditions. Next, the effect of processing temperature and pre-form condition on the quasi-static response, and stress-controlled fatigue behavior of closed-die forged AZ31B Mg alloy was investigated. The forging process was conducted on billets of cast as well as extruded AZ31B at temperatures of 250°C and 375°C and a forging rate of 20mm/s. The obtained mechanical test results showed a strong influence of processing temperature and initial material condition on the mechanical response of the forged product. For a given starting condition (either cast or extruded) a lower forging temperature resulted in superior quasi-static and cyclic properties whereas for a given processing temperature, the extruded starting billet displayed better mechanical properties compared to its cast counterpart post-forging. Extruded AZ31B forged at 250°C was observed to yield the best overall mechanical properties. Finally, quasi-static tension and shear tests in addition to cyclic axial and cyclic shear tests were also performed to characterize the uniaxial cyclic response of the previously determined optimal forgings. The cyclic axial behavior of the forging was superior to the starting extruded material while the cyclic shear behavior was comparable to low cycle behavior of extruded AZ31B in literature. Multi-axial fatigue tests revealed an increase in cyclic hardening as a result of non-proportionality however, overall fatigue life showed only a weak sensitivity of phase difference. A modified SWT model and Jahed-Varvani (JV) model were developed using the uniaxial cyclic test results. The modified SWT model was found to provide good life prediction for all the tested multi-axial load cases. The multi-axial formulation of the JV model yields good life predictions for in-phase and 45° out-of-phase multi-axial scenarios but slightly over-predicts fatigue life for certain 90° out-of-phase loading cases.
Download or read book Fatigue Properties of Die Cast AM60B Magnesium Alloy written by Vivek Chandrasekar and published by . This book was released on 1999 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnesium Alloys written by Frank Czerwinski and published by BoD – Books on Demand. This book was released on 2011-01-14 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists and engineers for decades searched to utilize magnesium, known of its low density, for light-weighting in many industrial sectors. This book provides a broad review of recent global developments in theory and practice of modern magnesium alloys. It covers fundamental aspects of alloy strengthening, recrystallization, details of microstructure and a unique role of grain refinement. The theory is linked with elements of alloy design and specific properties, including fatigue and creep resistance. Also technologies of alloy formation and processing, such as sheet rolling, semi-solid forming, welding and joining are considered. An opportunity of creation the metal matrix composite based on magnesium matrix is described along with carbon nanotubes as an effective reinforcement. A mixture of science and technology makes this book very useful for professionals from academia and industry.
Download or read book Fatigue Properties of Die Cast Magnesium Alloys written by P. D. D. Rodrigo and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Quantitative Aspects of Fatigue of Materials written by Harold N. Cummings and published by . This book was released on 1960 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Confidential Documents written by United States. Army Air Forces and published by . This book was released on 1940 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnesium Technology 2018 written by Dmytro Orlov and published by Springer. This book was released on 2018-01-26 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Magnesium Technology Symposium, the event on which this collection is based, is one of the largest yearly gatherings of magnesium specialists in the world. Papers represent 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 2017 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, there is coverage of new and emerging applications.
Download or read book A Review of the Air Force Materials Research and Development Program written by Helen H. Maxwell and published by . This book was released on 1958 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three hundred and three (303) technical reports and technical notes written during the period 1 July 1957 - 30 June 1958 are abstracted herein. These reports cover the following areas of research: adhesives, biochemistry, electronic materials, materials physics, metallurgy, packaging, petroleum products, plastics, protective treatments, rubber and textiles. A contractor index, investigator index, and a numerical index of all the technical reports and technical notes issued during the period March 1923 - 1958 are provided.
Download or read book The Effects of Temperature on the Mechanical Properties of Magnesium Alloys written by Battelle Memorial Institute and published by . This book was released on 1949 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
