Heat treatment effect on the microstructure and corrosion behavior of 316L stainless steel fabricated by selective laser melting for proton exchange membrane fuel cells
By D. Kong, X. Ni, Chaofang Dong, Liang Zhang, C. Man, Jizheng Yao, K. Xiao, Xiaogang Li. Electrochimica Acta, 2018
324 citations recorded by the source corpus.
Abstract Microstructure and corrosion behavior of 316L stainless steel fabricated by selective laser melting (SLM) for bipolar plate were investigated and the subsequent heat treatment effect was also clarified. Results showed that sub-grains widely existed in the SLM 316L and the dislocations in the grain boundary migrated and disappeared after heat treatment. The as produced SLM 316L exhibited inferior corrosion resistance than the wrought in 0.5 M H2SO4 solution with 50 ppm Cl− and 2 ppm F− ions at 70 °C due to the SLM defects (molten pool boundaries, non-equilibrium phases etc.), and short, stress relief annealing did not homogenize the non-uniform structures. However, recrystallization heat treatment can improve the durability due to the more uniform structure and thicker passive film. Meanwhile, the proportion of the oxides in passive film formed on SLM 316L increased after heat treatment, especially for the chromic oxide, leading to a better anti-corrosive property.
Subfields: Mechanical Engineering, Metals and Alloys
View Paper: https://www.semanticscholar.org/paper/3d0b869ac76f12d32bce48f8bd84330997f836a1
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In Mechanical Engineering
Citations in the corpus
- Grain refinement of stainless steel in ultrasound-assisted additive manufacturing (2020, background): “Experimental data from the literature [49-57] and this work on grain size d and primary spacing of cells λc of AM-fabricated 316L stainless steel are compiled in Table 2.”
- Microstructure modelling for metallic additive manufacturing: a review (2020, background): “Numerous works have been done on post-process heat treatment of AM parts and how they affect the microstructure (Kajima et al. 2018; Kim et al. 2018; Kong et al. 2018; Kurzynowski et al. 2018; Salman et al. 2019).”
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