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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.

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Preparation of high solid loading and low viscosity ceramic slurries for photopolymerization-based 3D printing

TL;DR: In this article, high solid loading and low viscosity cordierite slurries are successfully developed for the first time for photopolymerization-based additive manufacturing, which is mainly determined by their rheological properties and photocuring parameters.
Journal ArticleDOI

Three-dimensional printing of metals for biomedical applications.

TL;DR: Currently existing 3D printing techniques and their applications in developing metallic medical implants and devices and Perspective about the current challenges and future directions for development of this technology is presented.
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Nanocrystalline TiC-reinforced H13 steel matrix nanocomposites fabricated by selective laser melting ☆

TL;DR: In this article, the evolution of constitutional phases and microstructural features of the milled powders were investigated as a function of milling time, and the results showed that milled powder particles experienced significant cold-welding during the entire milling process, with a wide size distribution.
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Study of heat treatment parameters for additively manufactured AlSi10Mg in comparison with corresponding cast alloy

TL;DR: In this article, the influence of temperature and duration of solution and ageing treatment on microstructure, hardness and density of AlSi10Mg alloy produced by direct metal laser sintering was investigated.
Journal ArticleDOI

Corrosion of metallic materials fabricated by selective laser melting

TL;DR: In this paper, a review of the relationship between the unique microstructures and the corresponding corrosion behavior of several metallic alloys fabricated by selective laser melting is presented, including Ti-based, Al-based and Fe-based alloys.
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.
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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

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.
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