THRESHOLD STRESS INTENSITIES FOR HYDROGEN-INDUCED DELAYED FAILURE OF WELD METAL OF AUSTENITIC STAINLESS STEEL  

奥氏体不锈钢焊缝金属氢致滞后断裂门槛值研究(英文)

作　　者：潘川[1] 李正邦[1] 田志凌[1] 梁东图[1] 褚武扬[2] 乔利杰[2] 

机构地区：[1]钢铁研究总院焊接研究室,北京100081 [2]北京科技大学材料物理系,北京100083

出　　处：《Transactions of Tianjin University》2001年第3期147-152,共6页天津大学学报（英文版）

基　　金：Special Fund for the Major Basic Research Projects(No.G1 9990 650 )

摘　　要：It was found that hydrogen induced delayed failure could occur in 308L and 347L weld metals,and the threshold stress intensities of 308L and 347L welds were lower than that of 304L austenitic stainless steel.When dynamically charged under load on a single edge notched specimen,the threshold stress intensities of 308L,347L and 304L decrease with the increase in the diffusible hydrogen content C 0 and the experimental results are as follows:K ⅠH =85.2-10.7 ln C 0 (308L),K ⅠH =76.1-9.3 ln C 0 (347L),K ⅠH =91.7-10.1 ln C 0 (304L).The morphology of the hydrogen induced delayed fracture in the three materials are correlated with the K Ⅰ and C 0 values.3 0 8 L和 3 4 7L奥氏体不锈钢焊缝金属能发生氢致滞后断裂 ,而且比 3 0 4L母材更敏感 .用单边缺口试样动态充氢测出的氢致滞后断裂门槛应力强度因子 K H随可扩散氢浓度 C0 的对数而线性下降 ,即 K H=85 .2 -10 .7ln C0 (3 0 8L ) ,K H=76.1-9.3 ln C0 (3 4 7L ) ,K H=91.7-10 .1ln C0 (3 0 4L ) .三种材料氢致滞后断口形貌与 K 以及 C0 有关 ,当K 较高或 C0 较小时是韧窝断口 ,当 K 较低或 C0

关 键 词：austenitic stainless steel weld metal hydrogen  induced delayed failure 

分 类 号：TG401[金属学及工艺—焊接]