氢对金属中裂纹形核的影响  

Influence of Hydrogen on Nucleation of Cracks in Metal

作　　者：徐颖[1] 贺鹏飞[1] 林栋[1] 王正东[1] 吴东棣[1] 

机构地区：[1]上海交通大学,华东理工大学

出　　处：《应用力学学报》1996年第1期42-47,共6页Chinese Journal of Applied Mechanics

摘　　要：本文建立了金属中裂纹形核的一个理论模型，通过理论分析，讨论了氢对裂纹形核的影响。定义了与材料晶粒和脆性沉淀物尺寸有关的材料影响参数。结果表明，本文提出的模型有更明确的物理意义，环境中的氢参加裂纹形核和生长的三个阶段。Theoretical model,appropriate for considering whether or not cavities can be nucleated at discontinuites(e. g., grain-boundary ledges or precipitates), is analysed. The influence of hydrogen on nucleation of cracks were studied through a series of theoretical analysis. It is concluded that the nucleation criterion in this paper is clearer in physics,and hydrogen joins the three stages of nucleation andgrowth of cracks.

关 键 词：裂纹 形核 氢 金属材料 

分 类 号：TG111.91[金属学及工艺—物理冶金]