Interactions between Pre-strain and Dislocation Structures and Its Effect on the Hydrogen Trapping Behaviors

被引:0
作者
Rongjian Shi
Yanqi Tu
Liang Yang
Saiyu Liu
Shani Yang
Kewei Gao
Xu-Sheng Yang
Xiaolu Pang
机构
[1] University of Science and Technology Beijing,Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering
[2] University of Science and Technology Beijing,School of Mathematics and Physics
[3] The Hong Kong Polytechnic University,Department of Industrial and Systems Engineering
[4] Hong Kong Polytechnic University Shenzhen Research Institute,Key Laboratory for Advanced Materials of Ministry of Education, School of Materials Science and Engineering
[5] Tsinghua University,undefined
来源
Acta Metallurgica Sinica (English Letters) | 2023年 / 36卷
关键词
Hydrogen embrittlement; Hydrogen trapping; Pre-strain; Deformed microstructure; High-strength steel;
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中图分类号
学科分类号
摘要
This work investigated the effect of pre-strain and microstructures and their interactions on hydrogen trapping behaviors in case of 1-GPa high-strength martensitic steel Fe–0.05C–0.30Si–1.10Mn–3.50Ni–0.53Cr–0.50Mo–0.03 V (wt%). We found that the trapped reversible and trapped irreversible hydrogen contents increased significantly after applying a pre-strain of 5%, with an increase in the trapped reversible hydrogen content from 0.6 ppm in the original sample to 2.1 ppm. The hydrogen desorption activation energy also showed a slight increase. The microstructural evolution revealed that the concomitant dislocation cell-twin duplex microstructure with high-density tangled dislocations after pre-strain substantially increased the trapped reversible hydrogen contents. Additionally, the tangled dislocations pinned by the nanoprecipitates acted as deep irreversible hydrogen traps, increasing the trapped hydrogen at high temperatures after applying 5% pre-strain. These findings provide an expanded understanding of the hydrogen trapping behaviors of pre-strained microstructures.
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页码:1193 / 1202
页数:9
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