Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7171414 | International Journal of Fatigue | 2018 | 10 Pages |
Abstract
Cross-weld and pure base metal specimens machined from dissimilar welded joints of 9%Cr and CrMoV steels were cyclically loaded up to very high cycle fatigue at 500â¯Â°C under load ratio of zero. Results showed fatigue strength of the welds was greatly weakened, lower than base metals. A transition of failure mechanisms from geometrical soft zone in heat-affected zone of CrMoV steel to micro-defects induced cracking at weld metal was responsible for decreasing fatigue strength reduction factor with the increasing of fatigue lifetime. A sound fatigue design requires careful selection of filler metal and consideration of soft zone and micro-defects.
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Wei-Chang Zhang, Ming-Liang Zhu, Kai Wang, Fu-Zhen Xuan,