Investigation on Porosity and Microhardness of 316L Stainless Steel Fabricated by Selective Laser Melting

By S. M. Yusuf, Yifei Chen, Richard P. Boardman, Shoufeng Yang, N. Gao. 2017

193 citations recorded by the source corpus.

This study investigates the porosity and microhardness of 316L stainless steel samples fabricated by selective laser melting (SLM). The porosity content was measured using the Archimedes method and the advanced X-ray computed tomography (XCT) scan. High densification level (≥99%) with a low average porosity content (~0.82%) were obtained from the Archimedes method. The highest porosity content in the XCT-scanned sample was ~0.61. However, the pores in the SLM samples for both cases (optical microscopy and XCT) were not uniformly distributed. The higher average microhardness values in the SLM samples compared to the wrought manufactured counterpart are attributed to the fine microstructures from the localised melting and rapid solidification rate of the SLM process.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/8f1f8d15bfc9550b46ed25a1d28691f73a67c491

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Citations in the corpus

The effect of laser scanning strategies on texture, mechanical properties, and site-specific grain orientation in selective laser melted 316L SS (2020, background): “The pores were not evenlydistributedthroughoutthesampleandwerefoundtobeconcen-trated more in certain areas as compared to the rest of the sample [61].”
Corrosion performance of additively manufactured stainless steel parts: A review (2020, background): “68% which may lead to anisotropic behavior of the AM part [195].”
Microstructure and mechanical properties of 316L austenitic stainless steel processed by different SLM devices (2020, background): “The porosities determined here correspond to characteristic values for the porosity of SLM-built components, which also coincides with the work of others [35, 36].”
3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, background): “This information can be very useful during material qualification, as the types of pores and their locations can be related to the process parameters [32,262,263], thus providing a guidance for parameters optimisation.”