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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Computational fluid dynamics simulation of the melting process in the fused filament fabrication additive manufacturing technique
TL;DR: In this article, numerical simulation is used to understand the melting and pressurization mechanism in fused filament fabrication (FFF), and the results show the incoming fiber melts axisymmetrically, forming a cone of unmelted material in the center surrounded by melted polymer.
Journal ArticleDOI
A comprehensive review: metrology in additive manufacturing and 3D printing technology
Hitesh D. Vora,Subrata Sanyal +1 more
TL;DR: A comprehensive review of generic metrology and in-situ, real-time inspection methods that are currently utilized for the parts produced from conventional manufacturing processes in use and the appropriate meetrology and inspection methods are recommended here for various AM processes.
Journal ArticleDOI
Build orientation optimization for additive manufacturing of functionally graded material objects
TL;DR: A novel approach for build orientation optimization (BOO) of additively fabricated FGM parts is introduced and a surrogate model-based global optimization was implemented to solve the formulated BOO problem.
Journal ArticleDOI
Recent progress in the simulation of microstructure evolution in titanium alloys
TL;DR: In this article, a review of recent progress and future trends on the simulation of microstructure evolution in Ti-alloys and how these are combined with experimental characterization and verification, to reveal the controlling factor and hidden mechanism under various deformation/transformation conditions; and to promote the optimization of thermo-mechanical processing.
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Discrepancy of complete-arch titanium frameworks manufactured using selective laser melting and electron beam melting additive manufacturing technologies.
TL;DR: The titanium frameworks analyzed for a complete‐arch implant‐supported prosthesis fabricated using either the SLM or EBM additive technologies showed a clinically acceptable implant‐prosthesis discrepancy, where similar discrepancies on the x‐, y‐, and z‐axes were found between the additive manufacturing technologies.
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.