Deterministic Formulation of the Effect of Stress Intensity Factor on PWSCC of Ni-Base Alloys and Weld Metals

被引：27

作者：

Lu, Zhanpeng ^{[1
]}

Shoji, Tetsuo ^{[1
]}

Xue, He ^{[1
]}

Fu, Chaoyang ^{[1
]}

机构：

[1] Tohoku Univ, Fac Engn, Fracture & Reliabil Res Inst, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME | 2013年 / 135卷 / 02期

基金：

日本学术振兴会;

关键词：

nickel base alloys; stress corrosion cracking; crack growth rate; high temperature water; pressurized water reactor; theoretical modeling; LAW HARDENING MATERIAL; HIGH-TEMPERATURE; CRACK-GROWTH; CORROSION BEHAVIOR; HYDROGENATED WATER; QUANTITATIVE PREDICTION; STRAIN; TIP; 304-STAINLESS-STEEL; KINETICS;

D O I：

10.1115/1.4007471

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The fundamental correlations such as crack growth rate (CGR) versus K for primary water stress corrosion cracking (PWSCC) of nickel-base alloys in simulated pressurized water reactor environments are quantified with the theoretical model based on the combination of crack tip mechanics and oxidation kinetics. Materials reliability program (MRP) proposed a CGR disposition curve in a report MRP 55 for PWSCC of thick-section Alloy 600 materials. This deterministic CGR equation has been adopted by Section XI Nonmandatory Appendix O of the ASME Boiler and Pressure Code for flaw evaluation. MRP also proposed a CGR disposition curve in a report MRP 115 for PWSCC of Alloy 82/182/132 weld metals. Stress intensity factor (K), temperature and thermal activation energy are included in both MRP 55 and MRP 115 reports. Both MRP 55 and MRP 115 are engineering-based. The results of mechanism-based modeling are compared with the screened experimental data for typical PWSCC systems of nickel-base alloys and the consistence is observed.

引用

页数：9

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