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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Energy absorption characteristics of metallic triply periodic minimal surface sheet structures under compressive loading
TL;DR: In this paper, the authors investigated the mechanical properties and energy absorption abilities of three types of TPMS sheet structures (Primitive, Diamond, and Gyroid) fabricated by selective laser melting (SLM) with 316 L stainless steel under compression loading and classified their failure mechanisms and printing accuracy with the help of numerical analysis.
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Additive manufacturing in construction: A review on processes, applications, and digital planning methods
TL;DR: The application of additive manufacturing (AM) in construction has been increasingly studied in recent years as mentioned in this paper, and large robotic arm-and gantry-systems have been created to print building parts using aggregate-based materials, metals, or polymers.
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Effects of defects on mechanical properties in metal additive manufacturing: A review focusing on X-ray tomography insights
TL;DR: The use of X-ray tomography has emerged as a uniquely powerful and non-destructive tool to analyze defects in additive manufacturing, such as unintended porosity, rough surfaces and deviations from design as mentioned in this paper.
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An overview of residual stresses in metal powder bed fusion
Jamison L. Bartlett,Xiaodong Li +1 more
TL;DR: In this paper, the authors survey and assemble the knowledge existing in the literature regarding residual stresses in powder bed fusion (PBF) processes, highlighting the anisotropic nature of the stress fields.
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Titanium metal matrix composites: An overview
TL;DR: Titanium matrix composites (TMCs) offer high specific strength and stiffness compared with steel and nickel-base materials as mentioned in this paper, and can offer up to 50% weight reduction relative to monolithic superalloys.
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
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.