材料科学
脆性
韧性
氢
焊接
下降(电信)
冶金
微观结构
热影响区
氢脆
复合材料
腐蚀
化学
有机化学
电信
计算机科学
作者
Junga Lee,Dong-Hyun Lee,Moo-Young Seok,Un Bong Baek,Yun-Hee Lee,Seung Hoon Nahm,Jae-il Jang
标识
DOI:10.1016/j.matchar.2013.05.001
摘要
In this study, hydrogen effects on the impact toughness of simulated coarse-grained heat-affected zones (CGHAZs) in a linepipe steel were investigated in search of the possible “local brittle zone phenomenon” in hydrogen pipeline welds. After hydrogen charging, the inter-critically reheated and unaltered CGHAZ exhibited very low impact energies as well as occurrence of splitting. This hydrogen-induced toughness drop is discussed in terms of combined effects of brittle microstructures and hydrogen trapping.
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