Effect of CrN coating on the hot salt corrosion fatigue behavior of titanium alloy

被引：0
|
作者：
Li, Rong-Zhi [1 ,2 ]
Cheng, Cong-Qian [1 ]
Pu, Ji-Bin [2 ]
Min, Xiao-Hua [1 ]
Cao, Tie-Shan [1 ]
Zhao, Jie [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Related Technol, Key Lab Marine Mat & Protect Technol Zhejiang Prov, Ningbo 315201, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 240卷
基金：
中国国家自然科学基金;
关键词：
CrN coating; Hot salt corrosion fatigue; Failure behavior; Titanium alloy; LOW-CYCLE FATIGUE; SOLID NACL DEPOSIT; MULTILAYER COATINGS; NACL-H2O-O-2; RESISTANCE;
D O I：
10.1016/j.corsci.2024.112448
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dwell fatigue behavior of CrN coated titanium alloys were carried out in air and hot salt corrosive environment at 500 degree celsius. The results indicate that the decrease of the elastic modulus difference between the coating and the substrate alleviates the deformation mismatch issue at high temperature. Stress relaxation at the crack tip caused by Cr transition layer oxidation can improve the fatigue properties of the coated samples. Furthermore, the CrN coating enhances the corrosion fatigue properties, which is related to the barrier effect of the coating on the corrosive medium. The crack growth mode in the substrate transition from stress corrosion crack to fatigue damage crack.
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页数：13
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