Improvement of corrosion resistance of SS316L manufactured by selective laser melting through subcritical annealing

被引：95
作者：
Zhou, Chengshuang [1 ]
Hu, Shiyin [1 ]
Shi, Qiaoying [1 ]
Tao, Huimin [1 ]
Song, Yangyang [1 ]
Zheng, Jinyang [2 ]
Xu, Peng [3 ]
Zhang, Lin [1 ]
机构：
[1] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
[2] Zhejiang Univ, Inst Proc Equipment, Hangzhou 310027, Peoples R China
[3] Hefei Gen Machinery Res Inst, Hefei 230031, Peoples R China
来源：
CORROSION SCIENCE | 2020年 / 164卷
基金：
中国国家自然科学基金;
关键词：
Stainless steel; Polarisation; Polarization; SEM; TEM; Pitting corrosion; 316L STAINLESS-STEEL; SUB-GRAIN STRUCTURE; INTERGRANULAR CORROSION; MECHANICAL-PROPERTIES; PITTING CORROSION; HEAT-TREATMENT; MICROSTRUCTURE; BEHAVIOR; PARAMETERS; TI-6AL-4V;
D O I：
10.1016/j.corsci.2019.108353
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of heat treatment on pitting-corrosion resistance of 316 L stainless steel manufactured via selective laser melting (SLM) was investigated. The result shows that both pitting-corrosion resistance and mechanical properties under Subcritical-temperature heat treatment (950 degrees C) are better than 1100 degrees C and as-received. For as received samples, the most prone to pitting corrosion is melt-pool boundary (MPB). Subcritical-temperature heat treatment not only eliminates MPBs and high-density dislocation but also retains advantages of inclusion nanocrystallisation, cellular substructure. And recrystallisation occurs during 1100 degrees C heat treatment significantly reduces low-angle grain-boundary density and increases segregation and re-precipitation, which weakens corrosion resistance and mechanical properties.
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页数：11
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