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
Selective laser melting of Ti6Al4V alloy: Process parameters, defects and post-treatments
Anil Kumar Singla,Mainak Banerjee,Aman Sharma,Jagtar Singh,Anuj Bansal,Munish Kumar Gupta,Navneet Khanna,A. S. Shahi,Deepak Kumar Goyal +8 more
TL;DR: In this paper, a critical review of noteworthy contributions in terms of SLM process parameters, defects and various post processing techniques considered by various researchers is aimed for critical review, which can clearly facilitate in developing a better scientific understanding of SLMed Ti6Al4V alloy.
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Evaluating the Effect of Processing Parameters on Porosity in Electron Beam Melted Ti-6Al-4V via Synchrotron X-ray Microtomography
TL;DR: In this article, a detailed examination of the result of process parameter adjustments on the size and spatial distribution of gas porosity was performed utilizing synchrotron-based x-ray microtomography with a minimum feature resolution of 1.5 µm.
Journal ArticleDOI
Additively manufactured porous metallic biomaterials
TL;DR: An overview of the various aspects of design, manufacturing, and bio-functionalization of additively manufactured porous metallic biomaterials from a "designer material" viewpoint and discusses how rational design principles could be used to topologically design the underlying lattice structures in such a way that the desired properties are simultaneously optimized.
Journal ArticleDOI
Laser powder bed fusion of Ti-6Al-4V parts: Thermal modeling and mechanical implications
TL;DR: In this article, a continuum-scale modeling approach is developed and employed with three-dimensional finite element analysis (FEA) for simulating the temperature response of a Ti-6Al-4V, two-layered parallelepiped with dimensions of 10×5×0.06mm3 during laser powder bed fusion (L-PBF), a metals additive manufacturing (AM) method.
Journal ArticleDOI
Additive manufacturing of bone scaffolds
Youwen Yang,Guoyong Wang,Huixin Liang,Chengde Gao,Shuping Peng,Lida Shen,Cijun Shuai,Cijun Shuai +7 more
TL;DR: The state-of-the-art of scaffold design is reviewed, including computer-aided design, reverse modeling, topology optimization, and mathematical modeling, and the current characteristics of several typical AM techniques, including selective laser sintering, fused deposition modeling (FDM), and electron beam melting (EBM), especially their advantages and limitations are presented.
References
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Journal ArticleDOI
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.
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.