Metal Additive Manufacturing: A Review
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
Spatially Selective and Density-Controlled Activation of Interfacial Mechanophores.
TL;DR: The high spatial precision and control reported in this work brings us closer to molecular level programming of surface chemistry, with promising applications such as 3D nanoprinting, production of coatings, and composite materials that require nanopatterning or texture control as well as nanodevices and sensors for measuring mechanical stress and damage in situ.
Journal ArticleDOI
Model predictive control of layer width in wire arc additive manufacturing
Chunyang Xia,Chunyang Xia,Zengxi Stephen Pan,Shiyu Zhang,Joseph Polden,Long Wang,Huijun Li,Yanling Xu,Shanben Chen +8 more
TL;DR: In this paper, a vision-based feedback control for the layer width during the wire arc additive manufacturing (WAAM) process is developed using a robot and CMT welder with a visual sensing system.
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A review of slicing methods for directed energy deposition based additive manufacturing
TL;DR: The published slicing methods for additive manufacturing (AM), especially the multi-direction and non-layerwise slicing methods, are reviewed, which are particularly suitable for the directed energy deposition (DED) process to improve the surface quality and eliminate the usage of support structures.
Journal ArticleDOI
Effects of laser processing parameters on the mechanical properties, topology, and microstructure of additively manufactured porous metallic biomaterials: A vector-based approach
TL;DR: In this article, the effects of laser processing parameters including laser power and exposure time on the mechanical properties, topology, and microstructure of porous biomaterials AM using a novel vector-based approach were investigated.
Journal ArticleDOI
Materials and manufacturing renaissance: Additive manufacturing of high-entropy alloys
TL;DR: In this article, the microstructure of high-entropy alloy (HEA) parts produced by selective laser melting and powder-based directed energy deposition is investigated, and a solidification maps based on laser process parameters (as opposed to most commonly used solidification velocity and temperature gradient) are constructed by compiling available literature for single-phase face centered cubic, body-centered cubic, and multiphase HEAs.
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:
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Environmental aspects of laser-based and conventional tool and die manufacturing
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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.