文献类型：期刊文献

英文题名：Optimizing the hydrogen embrittlement resistance by Cu addition in a low carbon high strength steel

作者：Wang, Jinliang[1,2,3];Liu, Xing[1,2,3];Hu, Jiezhen[1,2,3];Tian, Yuwan[1,2,3];Xi, Xiaohui[1,2,3];Chen, Liqing[4]

机构：[1]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China;[2]Zhanjiang Key Lab Corros & Protect Ocean Engn Equi, Zhanjiang 524088, Peoples R China;[3]Guangdong Engn Technol Res Ctr Ocean Equipment & M, Zhanjiang 524088, Peoples R China;[4]Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China

年份：2024

卷号：158

外文期刊名：ENGINEERING FAILURE ANALYSIS

收录：SCI-EXPANDED(收录号：WOS:001171211000001)、、EI(收录号：20240515452368)、Scopus(收录号：2-s2.0-85183207477)、WOS

基金：This work is supported by the National Natural Science Foundation of China (Grant No: 52101133) , Guangdong Basic and Applied Basic Research Foundation (Grant No: 2021A1515110581 and 2021A1515110382) , the Science and Technology Projects of Zhanjiang (Grant No: 2021E05003 and 2022A01031) and the Program for scientific research start-up funds of Guangdong Ocean University (Grant No: 060302062306 and 060302062102) .

语种：英文

外文关键词：Low carbon high strength steel; Cu addition; Hydrogen embrittlement; Cu-rich precipitates; Crystal structure

外文摘要：This study used the electrochemical hydrogen permeation test and the slow strain rate tensile (SSRT) test to examine the impact of Cu addition on hydrogen embrittlement (HE) in a low carbon high strength steel. The following method explains how Cu alloying affected HE resistance. (i) Cu alloying refined the prior austenite grain size, which increased the effective area of grain/packet/ block/lath boundaries and mitigated the strain localization, and thus provided additional reversible hydrogen traps, homogenized the hydrogen distribution and suppressed local accumulation of hydrogen at boundaries. (ii) Cu alloying promoted the Cu-rich precipitates, which had strong binding energy with hydrogen. Also, the "incoherent" fcc Cu-rich precipitates contrary to the "slightly coherent" Cu-rich with an energy-poor trap strongly trapped hydrogen and enhanced the HE resistance.