Author: Thomas Wilkes Robinson
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages :
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Book Description
In recent years, additive manufacturing (AM) has gained prominence in rapid prototyping and production of structural components with complex geometries. Magnesium alloys, whose strength-to-weight ratio is superior compared to steel and aluminum alloys, have shown potential in lightweighting applications. However, commercial beam-based AM technologies have limited success with magnesium alloys due to vaporization and hot cracking. Therefore, as an alternative approach, we propose the use of a near net-shape solid-state additive manufacturing process, Additive Friction Stir Deposition (AFSD), to fabricate magnesium alloys in bulk. In this study, a parametric investigation was performed to quantify the effect of process parameters on AFSD build quality including volumetric defects and surface quality in magnesium alloy AZ31. In order to understand the effect of the AFSD process on structural integrity in the magnesium alloy AZ31, in-depth microstructure and mechanical property characterization was conducted on a bulk AFSD build fabricated with optimized process parameters. Results of the microstructure analysis of the as-deposited AFSD build revealed bulk microstructure similar to wrought magnesium alloy AZ31 plate. Additionally, similar hardness measurements were found in AFSD build compared to control wrought specimens. While tensile test results of the as-deposited AFSD build exhibited a 20 percent drop in yield strength, nearly identical ultimate strength was observed compared to the wrought control. The experimental results of this study illustrate the potential of using the AFSD process to additively manufacture Mg alloys for load bearing structural components with achieving wrought-like microstructure and mechanical properties.
Author: Hang Z. Yu
Publisher: John Wiley & Sons
ISBN: 3527839348
Category : Technology & Engineering
Languages : en
Pages : 421
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Book Description
Solid-State Metal Additive Manufacturing Timely summary of state-of-the-art solid-state metal 3D printing technologies, focusing on fundamental processing science and industrial applications Solid-State Metal Additive Manufacturing: Physics, Processes, Mechanical Properties, and Applications provides detailed and in-depth discussion on different solid-state metal additive manufacturing processes and applications, presenting associated methods, mechanisms and models, and unique benefits, as well as a detailed comparison to traditional fusion-based metal additive manufacturing. The text begins with a high-level overview of solid-state metal additive manufacturing with an emphasis on its position within the metal additive manufacturing spectrum and its potential for meeting specific demands in the aerospace, automotive, and defense industries. Next, each of the four categories of solid-state additive technologies—cold spray additive manufacturing, additive friction stir deposition, ultrasonic additive manufacturing, and sintering-based processes—is discussed in depth, reviewing advances in processing science, metallurgical science, and innovative applications. Finally, the future directions of these solid-state processes, especially the material innovation and artificial intelligence aspects, are discussed. Sample topics covered in Solid-State Metal Additive Manufacturing include: Physical processes and bonding mechanisms in impact-induced bonding and microstructures and microstructural evolution in cold sprayed materials Process fundamentals, dynamic microstructure evolution, and potential industrial applications of additive friction stir deposition Microstructural and mechanical characterization and industrial applications of ultrasonic additive manufacturing Principles of solid-state sintering, binder jetting-based metal printing, and sintering-based metal additive manufacturing methods for magnetic materials Critical issues inherent to melting and solidification, such as porosity, high residual stress, cast microstructure, anisotropic mechanical properties, and hot cracking Solid-State Metal Additive Manufacturing is an essential reference on the subject for academic researchers in materials science, mechanical, and biomedicine, as well as professional engineers in various manufacturing industries, especially those involved in building new additive technologies.
Author: Stian Sannes
Publisher:
ISBN:
Category : Magnesium alloys
Languages : en
Pages : 168
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Book Description
Author: Frank Czerwinski
Publisher: BoD – Books on Demand
ISBN: 9535117289
Category : Technology & Engineering
Languages : en
Pages : 182
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Book Description
Magnesium alloys with their unique physical and chemical properties are important candidates for many modern engineering applications. Their density, being the lowest of all structural metals, makes them the primary choice in global attempts aimed at reducing the weight of transportation vehicles. However, magnesium also creates challenges at certain stages of raw alloy melting, fabrication of net-shape components and their service. The first one is caused by very high affinity of magnesium to oxygen, which requires protective atmospheres increasing manufacturing cost and heavily contributing to greenhouse gas emissions. The second challenge relates to very high corrosivity of liquid magnesium towards materials it contacts. This imposes restrictions on the selection of materials used to contain, transfer or process molten magnesium during manufacturing operations. A mixture of unique benefits and serious challenges of magnesium alloys in solid and liquid states described here makes the book very useful for a broad audience of scientists and engineers from academia and industry.
Author: Hajo Dieringa
Publisher: Frontiers Media SA
ISBN: 2889712842
Category : Technology & Engineering
Languages : en
Pages : 192
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Book Description
Author: Amlan Kar
Publisher: CRC Press
ISBN: 1003803709
Category : Technology & Engineering
Languages : en
Pages : 292
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Book Description
The text focuses on discussing the solid-state deformation behavior of materials in additive manufacturing processes. It highlights the process optimization and bonding of different layers during layer-by-layer deposition of different materials in Solid-State. It covers the design, process, and advancement of solid-state additive manufacturing methods. • Covers the fundamentals of materials processing, including the stress–strain–temperature correlation in solid-state processing and manufacturing. • Discusses solid-state additive manufacturing methods, and optimization strategies for the fabrication of additive manufacturing products. • Showcases the mechanisms associated with improvement in mechanical properties of Solid-State additive manufacturing products. • Provides a comprehensive discussion on microstructural stability and homogeneity in mechanical properties. • Presents hybrid solid-state process for fabrication of multilayer components and composite materials. • Provides a detailed review of laser-based post-processing techniques The text focuses on the Solid-State additive manufacturing techniques for the fabrication of industrially relevant products. It gives in-depth information on the fundamental aspects, hybridization of the processes, fabrication of different materials, improvement in product performance, and Internet of Things enabled manufacturing. The text covers crucial topics, including hybrid Solid- State additive manufacturing, cold spray additive manufacturing, online defect detection of products, and post-processing of additively manufactured components. These subjects are significant in advancing additive manufacturing technology and ensuring the quality and efficiency of the produced components. It will serve as an ideal reference text for senior undergraduate and graduate students, and researchers in fields such as mechanical engineering, aerospace engineering, manufacturing engineering, and production engineering. .
Author: Hang Z. Yu
Publisher: Elsevier
ISBN: 0128243953
Category : Technology & Engineering
Languages : en
Pages : 351
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Book Description
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
Author: Domonkos Tolnai
Publisher: MDPI
ISBN: 3036511024
Category : Science
Languages : en
Pages : 118
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Book Description
Due to their lightweight and high specific strength, Mg-based alloys are considered as substitutes to their heavier counterparts in applications in which corrosion is non-relevant and weight saving is of importance. Furthermore, due to the biocompatibility of Mg, some alloys with controlled corrosion rates are used as degradable implant materials in the medical sector. The typical processing route of Mg parts incorporates a casting step and, subsequently, a thermo–mechanical treatment. In order to achieve the desired macroscopic properties and thus fulfill the service requirements, thorough knowledge of the relationship between the microstructure, the processing steps, and the resulting property profile is necessary. This Special Issue covers in situ and ex situ experimental and computational investigations of the behavior under thermo–mechanical load of Mg-based alloys utilizing modern characterization and simulation techniques. The papers cover investigations on the effect of rare earth additions on the mechanical properties of different Mg alloys, including the effect of long-period stacking-ordered (LPSO) structures, and the experimental and computational investigation of the effect of different processing routes.
Author: Karl U. Kainer
Publisher: John Wiley & Sons
ISBN: 9783527317646
Category : Science
Languages : en
Pages : 1144
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Book Description
The need for light-weight materials, especially in the automobile industry, created renewed interest in innovative applications of magnesium materials. This demand has resulted in increased research and development activity in companies and research institutes in order to achieve an improved property profile and better choice of alloy systems. Here, development trends and application potential in different fields like the automotive industry and communication technology are discussed in an interdisciplinary framework.
Author: L Liu
Publisher: Woodhead Publishing
ISBN: 9781845696924
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
Due to the wide application of magnesium alloys in metals manufacturing, it is very important to employ a reliable method of joining these reactive metals together and to other alloys. Welding and joining of magnesium alloys provides a detailed review of both established and new techniques for magnesium alloy welding and their characteristics, limitations and applications. Part one covers general issues in magnesium welding and joining, such as welding materials, metallurgy and the joining of magnesium alloys to other metals such as aluminium and steel. The corrosion and protection of magnesium alloy welds are also discussed. In part two particular welding and joining techniques are reviewed, with chapters covering such topics as inert gas welding, metal inert gas welding and laser welding, as well as soldering, mechanical joining and adhesive bonding. The application of newer techniques to magnesium alloys, such as hybrid laser-arc welding, activating flux tungsten inert gas welding and friction stir, is also discussed. With its distinguished editor and expert team of contributors, Welding and joining of magnesium alloys is a comprehensive reference for producers of primary magnesium and those using magnesium alloys in the welding, automotive and other such industries, as well as academic researchers in metallurgy and materials science.
