The Analysis of Hydrogen Diffusion Under Heat Transfer Condition Around The Heat Affected Zone of Welding

2003 ◽  
Vol 2003 (0) ◽  
pp. 807-808
Author(s):  
K. TAKEI ◽  
A. T. YOKOBORI
Keyword(s):  
Heat Transfer ◽  
Heat Affected Zone ◽  
Hydrogen Diffusion ◽  
Transfer Condition ◽  
Heat Transfer Condition

Calculation of transient temperature rise of dome under laminar heat transfer condition and improvement of dome structure

2018 ◽  
Vol 47 (2) ◽  
pp. 204004
Author(s):  
张代军 Zhang Daijun ◽  
罗海波 Luo Haibo ◽  
常 铮 Chang Zheng ◽  
惠 斌 Hui Bin
Keyword(s):  
Heat Transfer ◽  
Temperature Rise ◽  
Transient Temperature ◽  
Transfer Condition ◽  
Heat Transfer Condition ◽  
Dome Structure

The Analysis of Hydrogen Diffusion under Heat Transfer Condition around the Heat Affected Zone of Welding

2004 ◽  
Vol 261-263 ◽  
pp. 931-936 ◽  
Author(s):  
K. Takei ◽  
A.Toshimitsu Yokobori Jr.
Keyword(s):  
Heat Transfer ◽  
Heat Treatment ◽  
Numerical Analysis ◽  
Hydrogen Embrittlement ◽  
Brittle Fracture ◽  
Theoretical Analysis ◽  
Hydrogen Diffusion ◽  
Post Weld Heat Treatment ◽  
Hydrogen Distribution ◽  
Transfer Condition

Hydrogen embrittlement causes a crack initiation and brittle fracture. Therefore, it is important to conduct theoretical analysis to predict hydrogen distribution on the basis of reasonable physical model. In this paper, numerical analysis on the hydrogen diffusion and concentration at the localized stress field was conducted to clarify the behavior of hydrogen concentration and the sensitivity of hydrogen embrittlement. Furthermore, on the basis of this analysis, the effect of post weld heat treatment on the release of concentrated hydrogen was analyzed and optimum condition of post and pre heat treatment on the welding was investigated.

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