DIFFUSIBLE HYDROGEN BEHAVIOR IN PRE-STRAINED HIGH-STRENGTH STEEL

被引：24

作者：

SUZUKI, N ^{[1
]}

ISHII, N ^{[1
]}

TUCHIDA, Y ^{[1
]}

机构：

[1] NIPPON STEEL CORP LTD,BAR SHAPE & WIRE ROD TECH DIV,CHIYODA KU,TOKYO 100,JAPAN

来源：

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 1994年 / 80卷 / 11期

关键词：

DELAYED FRACTURE; DIFFUSIBLE HYDROGEN; HIGH STRENGTH STEEL; PRE-STRAINING; PLASTIC STRAIN;

D O I：

10.2355/tetsutohagane1955.80.11_855

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Diffusible hydrogen behavior in pre-strained high strength steel was investigated by use of a newly developed hydrogen content determining method for better understanding of delayed fracture. Pre-straining up to 4.2% formed a new hydrogen trapping site in the steel. When hydrogenerated in a 0.1N HCl solution, hydrogen content in the steel increased with the amount of pre-straining. The trapping site resulted from pre -straining was removed by aging at 200 degrees C. During the hydrogenation of the 4.2% pre-strained specimen, hydrogen content in the steel increase in accordance with Fick's law. The decrease of hydrogen content in the specimen pre-strained, hydrogenated, then held at room temperature cannot be explained by a single diffusion rate. This phenomenon can be better explained by assuming that hydrogen in the lattice and trapping sites diffuse independently without showing local equilibrium.

引用

页码：855 / 859

页数：5