Reduction of the Residual Porosity in Parts Manufactured by Selective Laser Melting Using Skywriting and High Focus Offset Strategies
TLDR
Inconel 718 samples were manufactured by SLM within the optimum process window regardless the process parameters whose origin has been directly related to the starting and finishing of the laser scanning tracks as mentioned in this paper.About:
This article is published in Physics Procedia.The article was published on 2016-01-01 and is currently open access. It has received 63 citations till now. The article focuses on the topics: Selective laser melting & Porosity.read more
Citations
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Journal ArticleDOI
Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing
Saad A. Khairallah,Aiden A. Martin,Jonathan R. I. Lee,Gabe Guss,Nicholas P. Calta,Joshua A. Hammons,Michael H. Nielsen,K.J. Chaput,Edwin J. Schwalbach,Megna N. Shah,Michael G. Chapman,Trevor M. Willey,Alexander M. Rubenchik,Andrew T. Anderson,Y. Morris Wang,Manyalibo J. Matthews,Wayne E. King +16 more
TL;DR: High-fidelity simulations are used to capture fast multitransient dynamics at the meso-nanosecond scale and discovered new spatter-induced defect formation mechanisms that depend on the scan strategy and a competition between laser shadowing and expulsion that will help improve build reliability.
Journal ArticleDOI
Mechanical response of a triply periodic minimal surface cellular structures manufactured by selective laser melting
TL;DR: In this article, the Schoen Gyroid (SG) unit cell, a triply periodic minimal surface (TPMS) structure, was used to design the cellular structures as opposed to many other types of unit cells, SG has superior characteristics of self-supporting and high manufacturability for additive manufacturing technologies.
Journal ArticleDOI
Post-processing of the Inconel 718 alloy parts fabricated by selective laser melting: Effects of mechanical surface treatments on surface topography, porosity, hardness and residual stress
TL;DR: In this article, the effects of various surface treatments on surface topography, porosity, hardness, and residual stress on turbine blade test parts were studied. And the effect of accumulated energy on the outcomes of the applied surface treatments is also addressed.
Journal ArticleDOI
Optimization and comparison of porosity rate measurement methods of Selective Laser Melted metallic parts
Thibaut de Terris,Olivier Andreau,Patrice Peyre,Frédéric Adamski,Imade Koutiri,Cyril Gorny,Corinne Dupuy +6 more
TL;DR: In this paper, the authors compare different methods for measuring parts density and propose optimal procedures to improve the porosity of selective laser melted (SLM) parts, in order to assess the physical origin of the different types of porosities.
Journal ArticleDOI
An investigation into the effect of gradients on the manufacturing fidelity of triply periodic minimal surface structures with graded density fabricated by selective laser melting
Lei Yang,Lei Yang,Massimiliano Ferrucci,Raya Mertens,Wim Dewulf,Chunze Yan,Yusheng Shi,Shoufeng Yang,Shoufeng Yang +8 more
TL;DR: In this paper, the effect of gradients on manufacturing fidelity was investigated using X-ray computed tomography (CT), and the results indicated that relative density and volume fraction of as-built GCSs are higher than those specified in the engineering design due to strut diameters being larger than specification and the presence of bonded powder particles.
References
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Journal ArticleDOI
A study of the microstructural evolution during selective laser melting of Ti–6Al–4V
TL;DR: In this article, the development of the microstructure of the Ti-6Al-4V alloy processed by selective laser melting (SLM) was studied by light optical microscopy.
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Reducing porosity in AlSi10Mg parts processed by selective laser melting
TL;DR: In this article, the windows of parameters required to produce high density parts from AlSi10Mg alloy using selective laser melting were investigated and a compromise between the different parameters and scan strategies was achieved and used to produce parts achieving a density of 99.8%.
Journal ArticleDOI
Selective laser melting of aluminium components
TL;DR: In this article, two MCP Realizer machines were used to process 6061 and AlSi12 alloys, one processing at 50 W and the other at 100 W laser power.
Journal ArticleDOI
Selective laser melting additive manufacturing of Inconel 718 superalloy parts: Densification, microstructure and properties
Qingbo Jia,Dongdong Gu +1 more
TL;DR: In this paper, a comprehensive study of densification behavior, microstructural features, microhardness, wear performance and high-temperature oxidation properties of Inconel 718 parts fabricated by selective laser melting (SLM), a typical additive manufacturing process was established.
Journal ArticleDOI
High Power Selective Laser Melting (HP SLM) of Aluminum Parts
TL;DR: In this article, the authors proposed an additive additive manufacturing (AM) technology that enables the production of light weight structured components with series identical mechanical properties without the need for part specific tooling or downstream sintering processes, etc.
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