材料科学
断口学
氢
断裂力学
合金
晶界
微观结构
兴奋剂
复合材料
冶金
化学
光电子学
有机化学
作者
Zhenghong Fu,Pengfei Wu
标识
DOI:10.1016/j.ijhydene.2023.11.135
摘要
The hydrogen-assisted fatigue crack propagation behavior of a C–N co-doped interstitial high-entropy alloy (iHEA) was investigated under in-situ electrochemical hydrogen charging. The cracking path, deformation microstructure, and fractography were characterized via multiple methods. Results suggest that hydrogen uptake shows a certain acceleration on the fatigue crack propagation rate (FCGR) of the iHEA, and such acceleration increases are intensified when increasing the hydrogen-charging current density. Crack propagation along grain boundaries and a remarkable decrease in the extent of plastic deformation immediately near to the crack surface have also been observed. This decrement of critical plastic strain for fatigue crack propagation primarily accelerates the FCGR.
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