Measurement Method of Sensitivity for Hydrogen Embrittlement of High Strength Bolts

被引:8
作者
Ham, Jong-Oh [1 ]
Kim, Bok-Gi [1 ]
Lee, Sun-Ho [2 ]
机构
[1] Korea Testing & Res Inst, Metall Mat Team, Inchon 404817, South Korea
[2] Korea Agcy Technol & Stand, Mat & Nanotech Stand Div, Gwacheon Si 247723, Gyonggi Do, South Korea
来源
KOREAN JOURNAL OF METALS AND MATERIALS | 2011年 / 49卷 / 01期
关键词
high strength bolt; hydrogen embrittlement; concentrated hydrogen; intergranular fracture;
D O I
10.3365/KJMM.2011.49.1.001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
To measure the sensitivity of the hydrogen embrittlement from plated high strength bolts (SWCH18A, F11T), the bolt was stressed by a corresponding to the amount of tensile strain of 5% and 20%, and then the bolt developed a crack on the surface. The bolt that didn't have concentrated hydrogen, even though it was stressed by a corresponding the amount of tensile strain of 5% and 20%, no crack developed. However, the bolt that had concentrated hydrogen, developed cracks from the thread crest to the root. It is impossible to measure the hydrogen amount from plated high strength bolts using Hydrogen-Determinator, because of the limitation of the minimum sample size (about 1g as a mass or 5 x 5 x 5 mm(3) as a volume). Therefore, the sensitivity of hydrogen embrittlement can be measured by observing the presence of cracks on the surface of plated high strength bolts which are stressed by a corresponding to the amount of tensile strain of 5% and 20%.
引用
收藏
页码:1 / 8
页数:8
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