Enhancing the corrosion resistance of selective laser melted 15-5PH martensite stainless steel via heat treatment

被引：91
作者：
Wang, Li [1 ]
Dong, Chaofang [1 ]
Man, Cheng [2 ]
Kong, Decheng [1 ]
Xiao, Kui [1 ]
Li, Xiaogang [1 ]
机构：
[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Key Lab Corros & Protect MOE, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[2] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
来源：
CORROSION SCIENCE | 2020年 / 166卷
基金：
中国国家自然科学基金;
关键词：
Stainless steel; Polarization; AFM; Passive film; PITTING CORROSION; MECHANICAL-PROPERTIES; ELECTROCHEMICAL-BEHAVIOR; REVERSED AUSTENITE; TEMPERING TREATMENT; TI-6AL-4V ALLOY; CARBON-STEEL; AGING TIME; MICROSTRUCTURE; DUPLEX;
D O I：
10.1016/j.corsci.2019.108427
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructural optimization for selective laser melted 15-5PH stainless steel via heat treatment to enhance corrosion resistance was investigated. The results showed that after aging treatment, Cu-rich nanoparticles (about 10 nm) diffusely precipitated, and approximately 18 similar to 25 % austenite was distributed near the molten pool boundary. The surface potential of the austenite was approximately 15 mV higher than that of martensite by scanning Kelvin probe force microscopy. However, the austenite phase disappeared and the new NbC-(Mn, Si)O duplex particles precipitated after solution treatment and aging treatment, which decreased the pitting corrosion resistance and passive film stability of the SLM 15-5PH stainless steel.
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页数：12
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