Journal ArticleDOI
Main defects observed in aluminum alloy parts produced by SLM: From causes to consequences
TLDR
In this article, a bibliographical study is presented to identify and classify the parameters and phenomena which influence the appearance of defects in aluminum alloy parts produced using the SLM process and hence the final properties of these parts.Abstract:
In recent years, the SLM process has been studied for the production of aluminum alloy parts, as these alloys demonstrate significant potential for the future, notably due to their low density which allows a considerable reduction in mass. The aim of this bibliographical study is to identify and classify the parameters and phenomena which influence the appearance of defects in aluminum alloy parts produced using the SLM process and hence the final properties of these parts. To do this, a cause tree diagram was created. For each defect or consequence identified (porosities, defects linked with hot cracking phenomena, anisotropy in the material and surface quality), we revealed the potential sources of the appearance of this defect, going back to the initial causes.read more
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Effect of Selective Laser Melting Process Parameters on the Quality of Al Alloy Parts: Powder Characterization, Density, Surface Roughness, and Dimensional Accuracy.
TL;DR: This study investigates the influence of selective laser melting (SLM) process parameters on the quality of parts fabricated from different Al alloys and develops a process map for each material by combining the optimized range of SLM process parameters for each characteristic to ensure good quality of the as-built parts.
Journal ArticleDOI
Strengthening mechanisms in direct metal laser sintered AlSi10Mg: Comparison between virgin and recycled powders
TL;DR: Rod shaped samples of AlSi10Mg additively manufactured using recycled powder through direct metal laser sintering (DMLS) process showed higher quasi-static uniaxial tensile strength in both horizontal and vertical build directions than those of cast counterpart alloy as discussed by the authors.
Journal ArticleDOI
Defects and anomalies in powder bed fusion metal additive manufacturing
Amir Mostafaei,Cang Zhao,Yining He,Seyed Reza Ghiaasiaan,Bo Shi,Shuai Shao,Nima Shamsaei,Ziheng Wu,Nadia Kouraytem,Tao Sun,Joseph Pauza,Jerard V. Gordon,Bryan A. Webler,Niranjan D. Parab,Mohammadreza Asherloo,Qi Chao Guo,Lianyi Chen,Anthony D. Rollett +17 more
TL;DR: In this article , a review of common defects and anomalies in powder bed fusion metal additive manufacturing processes is presented, where the formation mechanism and practical mitigation strategies are discussed, as well as properties such as mechanical behavior and corrosion resistance of defective parts.
Journal ArticleDOI
Review of defects in lattice structures manufactured by powder bed fusion
TL;DR: In this paper, a review of defects in lattice structures produced by powder bed fusion processes is presented, focusing on the effects of lattice design on dimensional inaccuracies, surface texture and porosity.
Journal ArticleDOI
Laser powder bed fusion of AA7075 alloy: Influence of process parameters on porosity and hot cracking
TL;DR: In this paper, the authors investigated the relationship between laser powder bed fusion (LPBF) parameters and defect formation with a focus on hot cracking and discussed the process window for the LPBF manufacturing of defect-free components of AA7075 alloy.
References
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Journal ArticleDOI
Metal Additive Manufacturing: A Review
TL;DR: 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.
Journal ArticleDOI
Review of selective laser melting : materials and applications
Chor Yen Yap,Chee Kai Chua,Zhili Dong,Zhong Hong Liu,Dan Qing Zhang,Loong Ee Loh,Swee Leong Sing +6 more
TL;DR: Selective laser melting (SLM) is a particular rapid prototyping, 3D printing, or additive manufacturing (AM) technique designed to use high power-density laser to melt and fuse metallic powders as mentioned in this paper.
Journal ArticleDOI
Fine-structured aluminium products with controllable texture by selective laser melting of pre-alloyed AlSi10Mg powder
TL;DR: In this paper, the high thermal gradients occurring during SLM lead to a very fine microstructure with submicron-sized cells, which can be modified to a weak cube texture along the building and scanning directions when a rotation of 90° of the scanning vectors within or between the layers is applied.
Journal ArticleDOI
A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties
TL;DR: In this article, the state of the art in selective laser sintering/melting (SLS/SLM) processing of aluminium powders is reviewed from different perspectives, including powder metallurgy (P/M), pulsed electric current (PECS), and laser welding of aluminium alloys.
Journal ArticleDOI
Microstructures and mechanical behavior of Inconel 718 fabricated by selective laser melting
Krista Amato,Sara M. Gaytan,Lawrence E Murr,E. Martinez,P. W. Shindo,Jennifer Hernandez,S. Collins,Francisco Medina +7 more
TL;DR: In this paper, the Inconel 718 cylinders were fabricated by selective laser melting in either argon or nitrogen gas from a pre-alloyed powder, and they exhibited columnar grains and arrays of oblate ellipsoidal precipitates oriented in a strong [2.0.0] texture determined by combined optical metallography, transmission electron microscopy, and X-ray diffraction analysis.