Effect of Interstitial Hydrogen on Cohesive Strength of Al Grain Boundary with Mg Segregation
- ISSN号:1005-0302
- 期刊名称:《材料科学技术学报:英文版》
- 时间:0
- 分类:TG146.21[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
- 作者机构:[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
- 相关基金:The authors thank Prof. Liangyue XI0NG and Prof. Yuanming WANG for their helpful discussion. This work was financially supported by the National Natural Science Foundation of China (NSFC) under grant Nos. 50371087 and 90206044 and Special Funds for the Major State Basic Research Project of China under grant No. G2000067104.
中文摘要:
艾尔 SIGMA=11 (113 ) 谷物边界(GB ) 的结合上的空隙的氢的效果用 thefirst 原则密度功能计算基于 Rice-Wang 的热力学的模型被调查。结果显示空隙的 H 从“加强精力”作为 embrittler 表现分析。减少的 GB 结合由于帽子的存在, GB 被归因于与的低亲密关系 H 和艾尔,并且艾尔结合削弱对 GB 飞机垂直的原子对。
英文摘要:
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.