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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Machine learning based fatigue life prediction with effects of additive manufacturing process parameters for printed SS 316L
Zhixin Zhan,Hua Li +1 more
TL;DR: A platform is developed for a data-driven analysis of continuum damage mechanics (CDM)-based fatigue life prediction of AM stainless steel (SS) 316L, in which the effects of AM process parameters are considered.
Journal ArticleDOI
Fatigue behavior and cyclic deformation of additive manufactured NiTi
TL;DR: In this paper, the authors investigate the fatigue behavior of additively manufactured (AM) NiTi (i.e., Nitinol) specimens and compare the results to the wrought material.
Journal ArticleDOI
Defect structure process maps for laser powder bed fusion additive manufacturing
Jerard V. Gordon,Sneha P. Narra,Ross B. Cunningham,He Liu,Hangman Chen,Robert M. Suter,Jack Beuth,Anthony D. Rollett +7 more
TL;DR: In this article, the defect structure process maps (DSPMs) were used to quantify the role of porosity as an exemplary defect structure in powder bed printed materials and demonstrated that large-scale defects in LPBF materials can be successfully predicted and thus mitigated/minimized via appropriate selection of processing parameters.
Journal ArticleDOI
Anisotropic Mechanical Behavior of AlSi10Mg Parts Produced by Selective Laser Melting
TL;DR: In this paper, the yield behavior for cylinders with XY orientation and Z orientation has been investigated and it was shown that the smaller tensile reduction in area of Z-oriented samples is related to tearing along the softer region at the boundaries of melt pools, where the silicon cell spacing is larger.
Journal ArticleDOI
3D gel-printing of hydroxyapatite scaffold for bone tissue engineering
TL;DR: Porous hydroxyapatite scaffolds for bone tissue engineering were successfully prepared using 3D gel-printing technology and the rheological properties of the HA ceramic slurry, the porosity and shrinkage, and the mechanical properties and degradability of the scaffold were studied.
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.
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.
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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.