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

被引：96

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.

引用

页数：11

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