• CN:11-2187/TH
  • ISSN:0577-6686

›› 1994, Vol. 30 ›› Issue (5): 50-54.

• 论文 • 上一篇    下一篇

氢对裂纹尖端塑性变形及裂纹扩展影响的TEM观察

廖波;康大韬;雷廷权;宋尚军   

  1. 燕山大学;哈尔滨工业大学;大连重型机器厂
  • 发布日期:1994-09-01

IN-SITU TEM STUDY ON THE EFFECT OF HYDROGEN ON THE DEFORMATION CRACK TIP AND CRACK PROPAGATION

Liao Bo;Kang Datao;Lei Tingquan;Song Sangjun   

  1. Yanshan University Harbin Institute of Technology Dalian Heavy Machinery Works
  • Published:1994-09-01

摘要: 利用透射电镜原位动态拉伸方法观察、分析氢对裂纹尖端塑性变形及裂纹扩展过程的影响。结果表明,氢促进裂纹尖端的局部塑性变形,改变裂纹扩展方式,并使裂纹以“Z”字型途径扩展。

关键词: 裂纹尖端, 裂纹扩展, 氢, 塑性变形

Abstract: The influence of hydrogen on the deformation ahead of crack tip and crack propagation were in-situ observed and analyzed under TEM during dynamic tensile deformation of engineering structure steel. The results show that hydrogen can promote the local plastic deformation ahead crack tip, and change the mode of crack propagation and crack will propagate as zigzag path.

Key words: Crack propagation, Crack tip, Hydrogen, Plastic deformation