Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum

Jing Xu; Chaofang Dong; Xiaogang Li

Volume 11 Issue 3

Jun. 2004

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文章导航 > 矿物冶金与材料学报（英文版） > 2004 > 11(3) : 245-250.

Cite this article as:

Jing Xu, Chaofang Dong, and Xiaogang Li, Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum, J. Univ. Sci. Technol. Beijing , 11(2004), No. 3, pp.245-250.

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Materials

Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum

Jing Xu^1), ,,
Chaofang Dong¹⁾,
Xiaogang Li^1,2)

Department of Material Physics, University of Science and Technology Beijing, Beijing 100083, China
State Key Laboratory of Corrosion and Protection, Shenyang 110016, China

基金项目:

This work was financially supported by the National Natural Science Foundation of China (No.59971011) and "973" Science Foundation of China (No. 19990650).

通信作者:
Jing Xu E-mail: xu.jing@163.net

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中文摘要

The healing mechanism of hydrogen-attacked cracks in low carbon steel and Cr-Mo steel and its influencing factors during the healing process were studied by recovering heat treatment of split specimens in vacuum. The result showed that crack pacing tums much smaller under the condition of pure heating, especially for crack tips. The healing effect is well related to the length of cracks with the shorter in priority. By the primary mechanism of thermal diffusion, iron and carbon atoms must diffuse at the high speed in steel to realize that plasticity deformation energy exceeds and overcomes surface tensile force energy. In addition, phase transformation and stress-stain relationship also have positive effects on the process.

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Materials

Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum

Jing Xu^1), ,,
Chaofang Dong¹⁾,
Xiaogang Li^1,2)

Author Affilications

Department of Material Physics, University of Science and Technology Beijing, Beijing 100083, China
State Key Laboratory of Corrosion and Protection, Shenyang 110016, China

Funds:
This work was financially supported by the National Natural Science Foundation of China (No.59971011) and "973" Science Foundation of China (No. 19990650).
Received: 17 March 2003;

Abstract:

Keywords:

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