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摘要:
The hydrogen effect on the nucleation and motion of dislocations in single-crystal bcc Fe with(110)surface was investigated by both nanoindentation experiments and discrete dislocation dynamics(DDD)simulation.The results of nanoindentation experiments showed that the pop-in load decreased evidently for the electrochemical hydrogen charging specimen,indicating that the dislocation nucleation strength might be reduced by hydrogen.In addition,the decrease of hardness due to hydrogen charging was also captured,implying that the dislocation motion might be promoted by hydrogen.By incorporating the effect of hydrogen on dislocation core energy,a DDD model was specifically proposed to investigate the influence of hydrogen on dislocation nucleation and motion.The results of DDD simulation revealed that under the effect of hydrogen,the dislocation nucleation strength is decreased and the motion of dislocation is promoted.
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篇名 Effect of Hydrogen on Dislocation Nucleation and Motion:Nanoindentation Experiment and Discrete Dislocation Dynamics Simulation
来源期刊 固体力学学报(英文版) 学科
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年,卷(期) 2022,(1) 所属期刊栏目 ORIGINAL PAPERS
研究方向 页码范围 1-14
页数 14页 分类号
字数 语种 英文
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固体力学学报(英文版)
双月刊
0894-9166
42-1121/O3
16开
武汉市珞瑜路1037号
1987
eng
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1143
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3267
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