Bio-functional and anti-corrosive 3D printing 316L stainless steel fabricated by selective laser melting

Publication date: 15 August 2018
Source:Materials & Design, Volume 152
Author(s): Decheng Kong, Xiaoqing Ni, Chaofang Dong, Xiaowei Lei, Liang Zhang, Cheng Man, Jizheng Yao, Xuequn Cheng, Xiaogang Li
Fine gas-atomized powders were prepared for fabricating 316L stainless steel by selective laser melting (SLM) for medical implant applications. The effect of 3D printing laser power on the microstructure, biocompatibility, mechanical and corrosion properties of SLM 316L were systematically investigated and compared with the traditionally quenched. The SLM 316L showed irregular grains with many sub-grains and a thicker passive film with lower Mo content than the quenched 316L. SLM 316L formed at high laser power showed improved elongation, corrosion resistance, and biocompatibility, while that prepared at low power showed poorer performance and was unstable during long-term experiments in simulated body fluid.

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