Metal Additive Manufacturing: A Review
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TLDR
The state-of-the-art of additive manufacturing (AM) can be classified into three categories: direct digital manufacturing, free-form fabrication, or 3D printing as discussed by the authors.Abstract:
This paper reviews the state-of-the-art of an important, rapidly emerging, manufacturing technology that is alternatively called additive manufacturing (AM), direct digital manufacturing, free form fabrication, or 3D printing, etc. A broad contextual overview of metallic AM is provided. AM has the potential to revolutionize the global parts manufacturing and logistics landscape. It enables distributed manufacturing and the productions of parts-on-demand while offering the potential to reduce cost, energy consumption, and carbon footprint. This paper explores the material science, processes, and business consideration associated with achieving these performance gains. It is concluded that a paradigm shift is required in order to fully exploit AM potential.read more
Citations
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Glass forming ability, flexural strength, and wear properties of additively manufactured Zr-based bulk metallic glasses produced through laser powder bed fusion
TL;DR: An evaluation of low-cost, high-oxygen content Zr-Cu-Al-Nb bulk metallic glasses (BMGs) produced through laser powder bed fusion (PBF) was performed as mentioned in this paper.
Journal ArticleDOI
Process optimization of complex geometries using feed forward control for laser powder bed fusion additive manufacturing
Clara Druzgalski,Ava S. Ashby,Gabriel M. Guss,Wayne E. King,Tien T. Roehling,Manyalibo J. Matthews +5 more
TL;DR: In this paper, the authors describe a fast, scalable method for part-scale process optimization of arbitrary geometries using feature extraction to identify scan vectors in need of parameter adaptation and applies results from simulation-based feed forward control models.
Journal ArticleDOI
Location dependence of microstructure, phase transformation temperature and mechanical properties on Ni-rich NiTi alloy fabricated by wire arc additive manufacturing
TL;DR: In this article, a Ni-rich NiTi alloy was successfully fabricated for the first time using wire arc additive manufacturing (WAAM) technique, which led to a decrease transformation temperature, increasing hardness and tensile strength but reduced ductility.
Journal ArticleDOI
Impact of Defects in Powder Feedstock Materials on Microstructure of 304L and 316L Stainless Steel Produced by Additive Manufacturing
Benjamin M. Morrow,Thomas J. Lienert,Cameron Knapp,Jacob O Sutton,Michael J. Brand,Robin Pacheco,Veronica Livescu,John S. Carpenter,George T. Gray +8 more
TL;DR: In this article, electron microscopy was used to study both the initial powder feedstock and microstructures in final AM parts, and the chemistry and origin of these nanoscale particles in several different metal alloys, and their impact on the final build.
Journal ArticleDOI
Environmental and Economic Implications of Distributed Additive Manufacturing: The Case of Injection Mold Tooling
Runze Huang,Matthew Riddle,Diane J. Graziano,Sujit Das,Sachin U Nimbalkar,Joe Cresko,Eric Masanet +6 more
TL;DR: In this paper, a system modeling framework is developed, with integrations of lead-time analysis, life cycle inventory analysis, and LCC model, and scenarios considering design differences, supply-chain options, productions, maintenance, and AM technological developments.
References
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TL;DR: In this paper, the macrostructure, microstructure and mechanical properties of a Ti-6Al-4V alloy after WAAM deposition have been investigated, and the average yield and ultimate tensile strengths of the as-deposited material were found to be slightly lower than those for a forged Ti- 6Al 4V bar (MIL-T 9047), however, the ductility was similar and the mean fatigue life was significantly higher.
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TL;DR: In this paper, the relationship between LAM processing parameters and microstructure in as-deposited Ti-6Al-4V was investigated, and the results presented in this paper provide a first look at the relationships between the two parameters.