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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Journal ArticleDOI
Microscale residual stresses in additively manufactured stainless steel.
Wen Chen,Wen Chen,Thomas Voisin,Yin Zhang,Jean-Baptiste Florien,Christopher M. Spadaccini,David L. McDowell,Ting Zhu,Y. Morris Wang +8 more
TL;DR: In situ synchrotron X-ray diffraction and computer simulations are combined to link residual stresses in steel to its tensile behaviour, establishing the mechanistic connections between the microscale residual stresses and mechanical behaviour of AM stainless steel.
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Invited Review Article: Metal-additive manufacturing — Modeling strategies for application-optimized designs
TL;DR: This review is envisioned to provide an essential framework on modeling techniques to supplement the experimental optimization process and highlight fundamental modeling strategies, considerations, and results, as well as validation techniques using experimental data.
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Microstructure and mechanical properties of additive manufactured copper alloy
TL;DR: In this article, the microstructure of the SLM material consists of grains elongated along build direction with the size in the range from 30 to 250 µm, and the mechanical test showed that the material has 195-211 MPa ultimate tensile strength (UTS) and 11-16% elongation at break at 20 µm.
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Revealing the Effects of Powder Reuse for Selective Laser Melting by Powder Characterization
TL;DR: In this paper, the impact of reusing powders on the additive manufacturing (AM) process under an argon high-purity atmosphere is investigated, by means of a simple but well-structured method that links the particle feature characterization process to the flowability of metal AM powders.
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Strengthening mechanisms in direct metal laser sintered AlSi10Mg: Comparison between virgin and recycled powders
TL;DR: Rod shaped samples of AlSi10Mg additively manufactured using recycled powder through direct metal laser sintering (DMLS) process showed higher quasi-static uniaxial tensile strength in both horizontal and vertical build directions than those of cast counterpart alloy as discussed by the authors.
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.
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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.
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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.
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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.