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Effect of Interstitial Hydrogen on Cohesive Strength of Al Grain Boundary with Mg Segregation
作者姓名:Xiaoguang  LIU  Xiaowei  WANG  Jingyang  WANG  Hongyan  ZHANG
作者单位:[1]Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016, China [2]International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016, China [3]Dept. of MIME, University of Toledo, Toledo, OH 43606, USA
基金项目:中国科学院资助项目,Special Funds for the Major State Basic Research Project of China
摘    要:The effect of interstitial hydrogen on the cohesion of the Al ∑ =11(113) grain boundary (GB) is investigated based on the thermodynamic model of Rice-Wang using the first-principles density tunction calculation. I he results indicate that interstitial H behaves as an embrittler from "strengthening energy" analysis. The reduced GB cohesion due to the presence of H at the GB is attributed to the low affinity between H and Al, and the weakened bonding of Al atomic pairs perpendicular to GB plane.

关 键 词:铝镁合金  晶界  粘结强度  
收稿时间:2005-04-04
修稿时间:2005-06-07

Effect of Interstitial Hydrogen on Cohesive Strength of Al Grain Boundary with Mg Segregation
Xiaoguang LIU Xiaowei WANG Jingyang WANG Hongyan ZHANG.Effect of Interstitial Hydrogen on Cohesive Strength of Al Grain Boundary with Mg Segregation[J].Journal of Materials Science & Technology,2006,22(1):135-138.
Authors:Xiaoguang LIU  Xiaowei WANG  Jingyang WANG  Hongyan ZHANG
Affiliation:Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China...
Abstract:The effect of interstitial hydrogen on the cohesion of the Al ∑=11(113) grain boundary (GB) is investigated based on the thermodynamic model of Rice-Wang using the first-principles density function calculation. The results indicate that interstitial H behaves as an embrittler from "strengthening energy" analysis. The reduced GB cohesion due to the presence of H at the GB is attributed to the low affinity between H and Al, and the weakened bonding of Al atomic pairs perpendicular to GB plane.
Keywords:Hydrogen  Grain boundary  Al-Mg alloys
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