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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High Entropy Alloys Manufactured by Additive Manufacturing
TL;DR: In this paper, a review of the literature on high-entropy alloys is presented, which is condensed into three different aspects: the different additive manufacturing technologies employed to process high entropy alloys, the influence of the processing conditions and composition on the expected structure and microstructure and information about the mechanical and corrosion behavior of these alloys.
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Review on residual stresses in metal additive manufacturing: formation mechanisms, parameter dependencies, prediction and control approaches
TL;DR: In this article , the authors provide a comprehensive review of the formation mechanisms, influence of process parameters, prediction and control methods of residual stress in MAMs, and their effect on the dimensional stability, corrosion resistance, crack growth resistance and mechanical properties of MAM samples.
Journal ArticleDOI
Abnormal corrosion behavior of selective laser melted AlSi10Mg alloy induced by heat treatment at 300 °C
TL;DR: In this article, a selective laser melted (SLMed) AlSi10Mg alloy was heat treated at 300°C and 400°C for 2h to investigate its microstructural evolution and corrosion behavior.
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Current state and potential of additive – hybrid manufacturing for metal parts
TL;DR: In this paper, the authors investigate the extent to which traditional manufacturers are equipped and interested in participating in a hybrid manufacturing system which integrates traditional processes such as machining and grinding with additive manufacturing (AM) processes.
Journal ArticleDOI
Towards predicting differences in fatigue performance of laser powder bed fused Ti-6Al-4V coupons from the same build
TL;DR: In this paper, two sets of uniaxial fatigue specimens were examined, differing only in gage section surface area and location on the build plate, and significant different fatigue performance was observed between the two geometries, despite being manufactured in the same laser power bed fusion (L-PBF) build.
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.
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.
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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.