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
Laser‐Induced Keyhole Defect Dynamics during Metal Additive Manufacturing
Andrew M. Kiss,Anthony Y. Fong,Nicholas P. Calta,Vivek Thampy,Aiden A. Martin,Philip J. Depond,Jenny Wang,Manyalibo J. Matthews,Ryan T. Ott,Christopher J. Tassone,Kevin H. Stone,Matthew J. Kramer,Anthony van Buuren,Michael F. Toney,Johanna Nelson Weker +14 more
TL;DR: In this paper, high-speed X-ray imaging is used to probe subsurface melt pool dynamics and void-formation mechanisms inaccessible to other monitoring approaches, which directly observes the depth and dynamic behavior of the vapor depression, also known as the keyhole depression, which is formed by recoil pressure from laser driven metal vaporization.
Journal ArticleDOI
Split Hopkinson pressure bar tests for investigating dynamic properties of additively manufactured AlSi10Mg alloy by selective laser melting
TL;DR: In this paper, the additively manufactured AlSi10Mg alloy by selective laser melting (AM-SLM-processed) has been investigated using the split Hopkinson pressure bar (SHPB) system.
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A low cost desktop electrochemical metal 3D printer
TL;DR: In this article, a novel electrochemical 3D printer design is proposed using a meniscus confinement approach which demonstrates deposition rates three orders of magnitude higher than equivalent systems due to improved mass transport characteristics afforded through a mechanical electrolyte entrainment mechanism.
Proceedings ArticleDOI
Microstructure and Mechanical Properties of 18Ni-300 Maraging Steel Fabricated by Selective Laser Melting
TL;DR: In this paper, the Selective Laser Melting Chaolin Tan (SLM) was used to fabricate a composite material for selecting laser melting Chaolin tiles, which was then used for surface engineering.
Journal ArticleDOI
Hybrid manufacturing: a review of the synergy between directed energy deposition and subtractive processes
José Luis Dávila,Paulo Inforçatti Neto,Pedro Yoshito Noritomi,Reginaldo Teixeira Coelho,Jorge Vicente Lopes da Silva +4 more
TL;DR: This review presents the latest developments, challenges, limitations, and future perspectives for the integration between directed energy deposition (DED) and SM.
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.
Journal ArticleDOI
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.
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.