Abstract The effect of undissolved and temper-induced (Ti,Mo)C precipitates on hydrogen embrittlement of quenched and tempered Cr-Mo steel is investigated by thermal desorption spectroscopy and slow strain rate tensile tests. The results indicate that spherical undissolved (Ti,Mo)C with an activation energy of 142 kJ/mol could not trap hydrogen through electrochemical charging. However, fine, temper-induced (Ti,Mo)C with an activation energy of 17.0–21.1 kJ/mol, which is far lower than that of pure (semi-)coherent TiC and similar to that of dislocations and grain boundaries, is deleterious hydrogen trap. Partial replacement of Ti by Mo reduces the hydrogen desorption activation energy at the (Ti,Mo)C/matrix interface.

中文翻译：

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未溶解和回火诱导的(Ti,Mo)C析出物对调质Cr-Mo钢氢脆的影响

摘要 通过热解吸光谱和慢应变速率拉伸试验研究了未溶解和回火诱导的(Ti,Mo)C析出物对调质Cr-Mo钢氢脆的影响。结果表明，活化能为 142 kJ/mol 的球形未溶解 (Ti,Mo)C 不能通过电化学充电捕获氢。然而，具有 17.0–21.1 kJ/mol 活化能的精细回火诱导 (Ti,Mo)C 远低于纯（半）相干 TiC 的活化能，并且与位错和晶界的活化能相似，有害的氢陷阱。用 Mo 部分替代 Ti 会降低 (Ti,Mo)C/基质界面处的氢解吸活化能。