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 finite element modeling: Validation with high-speed imaging and lack of fusion defects prediction
TL;DR: In this article, a finite element model (FEM) of the SLM process is proposed, together with its numerical validation by comparison with the literature, and experimental validation using high-speed imaging.
Journal ArticleDOI
Process development toward full-density stainless steel parts with binder jetting printing
TL;DR: In this paper, a new processing protocol for the binder jet printing (BJP) process is presented to reach near full density and better surface finish for stainless steel (SS) parts.
Journal ArticleDOI
Fracture and fatigue in additively manufactured metals
TL;DR: In this article, a comprehensive review of the current understanding of the structure-property correlations in AM alloys is provided, with an emphasis on the interplay between the microstructures and process attributes in determining the structural integrity of AM components in terms of properties such as near-threshold fatigue crack growth rate, fracture toughness, and fatigue strength.
Journal ArticleDOI
Significance of hot isostatic pressing (HIP) on multiaxial deformation and fatigue behaviors of additive manufactured Ti-6Al-4V including build orientation and surface roughness effects
TL;DR: In this paper, the effect of hot isostatic pressing (HIP) on fatigue performance under uniaxial, torsion, combined in-phase, and 90° out-of-phase axial-torsion loads was investigated.
Journal ArticleDOI
Effect of geometry on the mechanical properties of Ti-6Al-4V Gyroid structures fabricated via SLM: A numerical study
Eric Yang,Martin Leary,Bill Lozanovski,David Downing,Maciej Mazur,Avik Sarker,Amir Mahyar Khorasani,Amir Mahyar Khorasani,Alistair Jones,Tobias Maconachie,Stuart Bateman,Mark Alan Easton,Ma Qian,Peter F. M. Choong,Milan Brandt +14 more
TL;DR: In this paper, cubic Gyroid structures of various designs were simulated under quasi-static compression, using a simulation model verified with experimental data for AM Ti-6Al-4 V specimens fabricated by Selective Laser Melting (SLM).
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.
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.