氢
材料科学
俘获
扩散
热扩散率
位错
渗透
氢脆
冶金
分析化学(期刊)
复合材料
热力学
化学
腐蚀
膜
色谱法
有机化学
物理
生态学
生物
生物化学
作者
Chulho Park,Ning Kang,Myunghyun Kim,Stephen V. Liu
标识
DOI:10.1016/j.matlet.2018.10.049
摘要
Hydrogen permeation tests were electrochemically performed to measure hydrogen diffusion and trapping in EH 36 steel. Permeation transients were measured through charging and decaying cycles, for specimens prestrained to varying degrees (0–20%). With increasing prestrain, the effective hydrogen diffusivity (Deff) decreased, while the total/reversible hydrogen content (Co and Cr, respectively) increased. The immobile dislocation of the 20%-prestrained specimens decreased Deff by approximately ten times and increased Co and Cr by approximately three times. The amount of irreversibly trapped hydrogen (Cirr) remained approximately the same, regardless of the prestrain. The dislocations delay the motion of hydrogen and contain more reversible hydrogen.
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