摘要
将高强钢焊接热影响区中硬化组织ＭＡ组元视作局部硬化区（ＬＨＺ），采用二维有限元数值方法讨论了含ＬＨＺ材料的断裂机理．结果表明，含细长ＭＡ的热影响区比含块状ＭＡ的热影响区更容易产生裂纹．这一结果在高强钢焊接影响区ＣＴＯＤ试验中得到证实。
Two dimensional FE analysis has been used to investigate the fracture mechanism of the material containing the LHZ (local hard zone) corresponding to MA constituent in the weld HAZ of high strength steel. The results show that the slender MA constituent is more sensitive to microcrack formation than the blocky one. This was confirmed by a CTOD test on the weld HAZ of a high strength steel. Hence, it is effective to improve the toughness in the weld HAZ by controlling the shape of MA constituent.
出处
《天津大学学报》
EI
CAS
CSCD
1997年第4期485-488,共4页
Journal of Tianjin University(Science and Technology)
基金
国家教委优秀青年教师基金
