Behavior and susceptibility to stress corrosion cracking of a nickel-based alloy in superheated steam and supercritical water

被引：9

作者：

Khan, Hasan Izhar ^{[1
]}

Zhang, Naiqiang ^{[1
]}

Zhu, Zhongliang ^{[1
]}

Jiang, Dongfang ^{[2
]}

Asif, Tahir ^{[3
]}

Xu, Hong ^{[1
]}

机构：

[1] North China Elect Power Univ, Sch Energy Power & Mech Engn, MOEs Key Lab Condit Monitoring & Control Power Pl, Beijing 102206, Peoples R China

[2] State Grid Energy Res Inst Co LTD, Beijing 102209, Peoples R China

[3] Univ Engn & Technol, Dept Mech Mechatron & Mfg Engn KSK Campus, Lahore, Pakistan

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2019年 / 70卷 / 01期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

nickel-based alloy; stress corrosion cracking; supercritical water; superheated steam; STAINLESS-STEEL; FLUID-FLOW; INITIATION; PRESSURE;

D O I：

10.1002/maco.201810237

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Stress corrosion cracking (SCC) behavior of Alloy 617 was studied to evaluate its suitability for Generation IV supercritical water reactor concept. A series of slow strain rate tensile (SSRT) tests at a constant strain rate of 5 x 10(-7) s(-1) were carried out in superheated steam and supercritical water over a pressure range of 0.1-25 MPa at 650 degrees C. SSRT test in dry N-2 gas was also performed to compare the results in non-corrosive environment with corrosive medium environment. Intergranular cracks were observed for all specimens regardless of the test environment. Alloy 617 showed susceptibility to SCC at the tested experimental conditions. The dominance of intergranular SCC was observed on the gage surface and fracture surface by using scanning electron microscope analysis. The effect of varying environmental conditions on SCC susceptibility is further discussed.

引用

页码：48 / 56

页数：9

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