摘要
在扫描电镜下，对焊接热影响区及一种焊缝金属的低周疲劳裂纹扩展进行了动态原位观察，进一步说明低周疲劳裂纹扩展的形态及方式，以及与材料的疲劳裂纹扩展阻力之间存在着一定的关系，其形态与方式是材料微观组织与特定循环载荷之间相互作用的某种反映．
In situ observation under SEM is carried out upon the dynamic propagation of low cyclic fatigue cracks in a heat affected zone and a weld metal, which further shows that a certain correlation exists between the growth morphology and pattern and the resistance of the material to the fatigue crack propagation. The morphology and pattern reflect to some extent the interaction between the microstructure of the material and specified cyclic loading.
出处
《甘肃工业大学学报》
1998年第1期6-10,共5页
Journal of Gansu University of Technology
关键词
疲劳裂纹
焊接热影响区
焊缝金属
裂纹扩展
low cyclic fatigue crack, HAZ of welding, weld metal, micro crack, bifurcation
