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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Shaped metal deposition technique in additive manufacturing: A review
TL;DR: Shaped metal deposition is a relatively new additive layered manufacturing method as discussed by the authors, which is a novel technique to build net-shaped or near-net-shaped metal components in a layer-by-layer manner via applying metal wire and selection of a heat source.
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Cold Spraying of Armstrong Process Titanium Powder for Additive Manufacturing
TL;DR: In this paper, a method to manufacture low-porosity titanium components at high deposition efficiencies is revealed by combining low-pressure cold spray using nitrogen as the carrier gas with low-cost titanium powder produced using the Armstrong process.
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Additive manufacturing of ITER first wall panel parts by two approaches: Selective laser melting and electron beam melting
Yuan Zhong,Lars-Erik Rännar,Stefan Wikman,Andrey Koptyug,Leifeng Liu,Daqing Cui,Zhijian Shen +6 more
TL;DR: In this article, two additive manufacturing (AM) technologies, selective laser melting (SLM) and electron beam melting (EBM), were applied to manufacture ITER First Wall (FW) Panel parts with complex design.
Journal ArticleDOI
Corrosion properties of 304L stainless steel made by directed energy deposition additive manufacturing
TL;DR: The impact of microstructure and processing defects of DED 304L stainless steel on its corrosion behavior was investigated in this paper, showing that lack of fusion pores in the DED material controlled breakdown potential (Eb) to the first order, reducing it by up to 400mV versus the base material in 0.6mV NaCl.
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Microstructure Evolution and Mechanical Behavior of 2219 Aluminum Alloys Additively Fabricated by the Cold Metal Transfer Process.
TL;DR: The statistical analysis of the porosity and its size distribution indicated that the CMT-PADV process gave the smallest pore area percentage and pore aspect ratio, and had almost no larger pores.
References
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As-Fabricated and Heat-Treated Microstructures of the Ti-6Al-4V Alloy Processed by Selective Laser Melting
TL;DR: In this paper, the authors presented the various types of microstructure of the Ti-6Al-4V alloy after post-fabrication heat treatments below or above the β transus.
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Microstructure and Mechanical Properties of Wire and Arc Additive Manufactured Ti-6Al-4V
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.
Journal ArticleDOI
Cost estimation for rapid manufacturing - laser sintering production for low to medium volumes:
TL;DR: In this article, a cost model for laser sintering is proposed, which leads to graph profiles that are typical for layer-by-layer manufacturing processes, and the evolution of cost models and the indirect cost significance in modern costing representation is shown.
Journal ArticleDOI
Environmental aspects of laser-based and conventional tool and die manufacturing
TL;DR: In this paper, the authors investigated three case studies to reveal the extent to which DMD-based manufacturing of molds and dies can currently achieve reduced environmental emissions and energy consumption relative to conventional manufacturing pathways.
Journal ArticleDOI
The laser additive manufacture of Ti-6Al-4V
P. A. Kobryn,S. L. Semiatin +1 more
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.