Mechanical properties and corrosion behavior of selective laser melted 316L stainless steel after different heat treatment processes
By D. Kong, Chaofang Dong, X. Ni, Liang Zhang, Jizheng Yao, C. Man, Xuequn Cheng, K. Xiao, Xiaogang Li. Journal of Materials Science & Technology, 2019
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Abstract Irregular grains, high interfacial stresses and anisotropic properties widely exist in 3D-printed metallic materials, and this paper investigated the effects of heat treatment on the microstructural, mechanical and corrosion properties of 316 L stainless steel fabricated by selective laser melting. Sub-grains and low-angle boundaries exist in the as-received selective laser melted (SLMed) 316 L stainless steel. After heat treatment at 1050 °C, the sub-grains and low-angle boundaries changed slightly, and the stress state and strength decreased to some extent due to the decrease of dislocation density. After heat treatment at 1200 °C, the grains became uniform, and the dislocation cells vanished, which led to a sharp decline in the hardness and strength. However, the ductility was improved after recrystallization heat treatment. The passive film thickness and corrosion potential of the SLMed 316 L stainless steel decreased after heat treatment, and the pitting potential also decreased due to the accelerated transition from metastable to steady-state pitting; this accelerated transition was caused by the presence of weak passive films at the enlarged pores after heat treatment, especially for an adequate solid solution treatment.
Subfields: Automotive Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/82ba77fb535a42cae915d2fb7ca8283b07b284a8
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Citations in the corpus
- Additive manufacturing of steels: a review of achievements and challenges (2020, background): “[104] Kong D, Dong C, Ni X, Zhang L, Yao J, Man C, Cheng X, Xiao K, Li X (2019) Mechanical properties and corrosion behavior of selective laser melted 316L stainless steel after”
- Corrosion performance of additively manufactured stainless steel parts: A review (2020, background): “steady state pits and decrease the pitting potential [157].”