通过16MnR压力容器用钢焊接接头的低周疲劳实验,研究了母材、焊缝和热影响区的循环滞回环特性及其变化规律提出了焊接接头疲劳失效的定义,建立了循环滞回能及总耗散能与疲劳寿命之间的实验关系式;讨论了焊接力学非均匀性对疲劳损伤的影响.
The cyclic hysteresis loops and their variation rules of base metal, weld metaland heat-affected zone for 16MnR pressure vessel steel were investigated by low-cycle fa-tigue tests. The definition of fatigue failure for welded joint was proposed, and the experimen-tal relations of cyclic hysteresis energy or total absorbed energy to failure vs the fatigue lifewere established. Finally, the effect of welding mechanical heterogeneity to fatigue damagewas discussed.
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