Towards Elucidating The Process Structure Performance Relationships Of Lightweight Structural Alloys
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Author | : Benjamin Andrew Rutherford |
Publisher | : |
Total Pages | : 252 |
Release | : 2020 |
Genre | : |
ISBN | : |
Additive manufacturing processes have become a leading technology for research innovation. Additive manufacturing offers the capacity to fabricate complex, near net shape components and the possibility to repair existing components. The vast majority of additive processes are fusion-based, relying on melting and solidification, which can lead to poor mechanical performance due to intense thermal gradients leading to solidification cracking and columnar dendritic grain growth. Additive Friction Stir-Deposition (AFS-D) is a novel technique that implements solid-state severe deformation to create depositions additively. As such, the AFS-D process offers potential to fabricate fully dense components with wrought-like mechanical performance and microstructure. Likewise, AFS-D avoids the intense thermal gradients of fusion welding that leads to solidification cracking in lightweight materials in aerospace applications, such as aluminum alloys. In this research, the process-structure-property relationship is quantified by means of microstructure characterization and mechanical evaluation of AFS-D AA6061. To understand the process-structure-property relationships of AFS-D as-deposited AA6061, test specimens in two orthogonal directions, longitudinal and build, were subjected to quasi-static monotonic tension and strain-controlled fatigue testing. Microstructural evaluation revealed the refinement of constituent particles in AFS-D AA6061, in addition to dynamic recrystallization and grain refinement. Mechanical results indicated homogeneous strength between the two directions investigated at a similar strength to wrought AA6061-O, and fatigue performance similar to the wrought in the longitudinal direction. Microstructural examination of a standard heat treatment for the T6 temper of AA6061 on AFS-D AA6061 was conducted. This led to mechanical performance superior in strength to the control wrought AA6061-T651 in monotonic tension tests, and similar fatigue performance to the as-deposited AFS-D AA6061 and wrought AA6061. Fractography revealed an evolution in the deformation behavior for post deposition heat treated AFS-D AA6061 compared to the as-deposited specimens. Lastly, the mean strain effects of heat treated AFS-D AA6061 and a lightweight rolled aerospace aluminum alloy, AA2099-T83, are quantified and captured in this work. The tensile stable cycle mean stress proved detrimental to the fatigue performance of aluminum alloys. A modified strain-based Morrow model is proposed in this work that successfully captures the effect of tensile mean strain loading conditions on these aluminum alloys.
Author | : |
Publisher | : |
Total Pages | : 1572 |
Release | : 1992 |
Genre | : Aeronautics |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 500 |
Release | : 2003-07 |
Genre | : Steel industry and trade |
ISBN | : |
Author | : Lorna J. Gibson |
Publisher | : Cambridge University Press |
Total Pages | : 536 |
Release | : 1997 |
Genre | : Science |
ISBN | : 9780521499118 |
In this new edition of their classic work on Cellular Solids, the authors have brought the book completely up to date, including new work on processing of metallic and ceramic foams and on the mechanical, electrical and acoustic properties of cellular solids. Data for commercially available foams are presented on material property charts; two new case studies show how the charts are used for selection of foams in engineering design. Over 150 references appearing in the literature since the publication of the first edition are cited. The text summarises current understanding of the structure and mechanical behaviour of cellular materials, and the ways in which they can be exploited in engineering design. Cellular solids include engineering honeycombs and foams (which can now be made from polymers, metals, ceramics and composites) as well as natural materials, such as wood, cork and cancellous bone.
Author | : P.K. Mallick |
Publisher | : Elsevier |
Total Pages | : 382 |
Release | : 2010-03-01 |
Genre | : Technology & Engineering |
ISBN | : 1845697820 |
Research into the manufacture of lightweight automobiles is driven by the need to reduce fuel consumption to preserve dwindling hydrocarbon resources without compromising other attributes such as safety, performance, recyclability and cost. Materials, design and manufacturing for lightweight vehicles will make it easier for engineers to not only learn about the materials being considered for lightweight automobiles, but also to compare their characteristics and properties.Part one discusses materials for lightweight automotive structures with chapters on advanced steels for lightweight automotive structures, aluminium alloys, magnesium alloys for lightweight powertrains and automotive structures, thermoplastics and thermoplastic matrix composites and thermoset matrix composites for lightweight automotive structures. Part two reviews manufacturing and design of lightweight automotive structures covering topics such as manufacturing processes for light alloys, joining for lightweight vehicles, recycling and lifecycle issues and crashworthiness design for lightweight vehicles.With its distinguished editor and renowned team of contributors, Materials, design and manufacturing for lightweight vehicles is a standard reference for practicing engineers involved in the design and material selection for motor vehicle bodies and components as well as material scientists, environmental scientists, policy makers, car companies and automotive component manufacturers. Provides a comprehensive analysis of the materials being used for the manufacture of lightweight vehicles whilst comparing characteristics and properties Examines crashworthiness design issues for lightweight vehicles and further emphasises the development of lightweight vehicles without compromising safety considerations and performance Explores the manufacturing process for light alloys including metal forming processes for automotive applications
Author | : |
Publisher | : DIANE Publishing |
Total Pages | : 221 |
Release | : |
Genre | : |
ISBN | : 1422345610 |
Author | : |
Publisher | : |
Total Pages | : 1030 |
Release | : 2004 |
Genre | : Materials |
ISBN | : |
Author | : Michael C. Gao |
Publisher | : Springer |
Total Pages | : 524 |
Release | : 2016-04-27 |
Genre | : Technology & Engineering |
ISBN | : 3319270133 |
This book provides a systematic and comprehensive description of high-entropy alloys (HEAs). The authors summarize key properties of HEAs from the perspective of both fundamental understanding and applications, which are supported by in-depth analyses. The book also contains computational modeling in tackling HEAs, which help elucidate the formation mechanisms and properties of HEAs from various length and time scales.
Author | : Sundeep Mukherjee |
Publisher | : MDPI |
Total Pages | : 278 |
Release | : 2020-11-04 |
Genre | : Technology & Engineering |
ISBN | : 3039434748 |
This book is a collection of several unique articles on the current state of research on complex concentrated alloys, as well as their compelling future opportunities in wide ranging applications. Complex concentrated alloys consist of multiple principal elements and represent a new paradigm in structural alloy design. They show a range of exceptional properties that are unachievable in conventional alloys, including high strength–ductility combination, resistance to oxidation, corrosion/wear resistance, and excellent high-temperature properties. The research articles, reviews, and perspectives are intended to provide a wholistic view of this multidisciplinary subject of interest to scientists and engineers.
Author | : |
Publisher | : Elsevier |
Total Pages | : 4238 |
Release | : 2020-01-09 |
Genre | : Reference |
ISBN | : 0128131969 |
Encyclopedia of Renewable and Sustainable Materials, Five Volume Set provides a comprehensive overview, covering research and development on all aspects of renewable, recyclable and sustainable materials. The use of renewable and sustainable materials in building construction, the automotive sector, energy, textiles and others can create markets for agricultural products and additional revenue streams for farmers, as well as significantly reduce carbon dioxide (CO2) emissions, manufacturing energy requirements, manufacturing costs and waste. This book provides researchers, students and professionals in materials science and engineering with tactics and information as they face increasingly complex challenges around the development, selection and use of construction and manufacturing materials. Covers a broad range of topics not available elsewhere in one resource Arranged thematically for ease of navigation Discusses key features on processing, use, application and the environmental benefits of renewable and sustainable materials Contains a special focus on sustainability that will lead to the reduction of carbon emissions and enhance protection of the natural environment with regard to sustainable materials