Using tapered specimens to study the effect of hydrogen and surface finish on SCC initiation in Alloy 182 under boiling water reactor conditions

被引：15

作者：

Bai, Juxing ^{[1
]}

Ritter, Stefan ^{[1
]}

Seifert, Hans-Peter ^{[1
]}

Virtanen, Sannakaisa ^{[2
]}

机构：

[1] Paul Scherrer Inst, Nucl Energy & Safety Res Div, Lab Nucl Mat, CH-5232 Villigen, Switzerland

[2] Friedrich Alexander Univ Erlangen Nurnberg, Erlangen, Germany

来源：

CORROSION ENGINEERING SCIENCE AND TECHNOLOGY | 2017年 / 52卷 / 08期

关键词：

Stress corrosion cracking; Ni-base alloy; boiling water reactor; hydrogen; surface finish; initiation; constant extension rate tensile test; DEFORMATION;

D O I：

10.1080/1478422X.2017.1340245

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of dissolved hydrogen content and surface finish on the stress corrosion cracking (SCC) initiation behaviour in Alloy 182 weld metal was studied with flat tapered tensile specimens in simulated boiling water reactor water at 274 degrees C using constant extension rate tensile tests. The surface crack distribution, crack depth and stress threshold for SCC initiation were analysed by detailed post-test quantitative characterisation. Intergranular SCC initiation has been found in all specimens tested with dissolved hydrogen contents varying from 10 to 2000ppb. The highest crack density and depth and lowest stress threshold for crack initiation were found to be at the Ni/NiO phase transition line with 253ppb dissolved hydrogen content. In addition, ground surfaces showed a tendency to higher SCC initiation susceptibility compared to electro-polished surfaces.

引用

页码：558 / 566

页数：9

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