研究了在氢环境中１６Ｍｎｇ钢的低频短裂纹扩展规律。应用弹塑性断裂力学和△Ｊ参数，用ｄａ／ｄＮ＝Ｃ（△Ｊ）ｎ计算裂纹的扩散速率。结果表明ｄａ／ｄＮ～△Ｊ关系曲线分三个阶段；并得到了在氢环境中裂纹扩展的门槛值△Ｊ（ｔｈ）。用金相法考察了裂纹扩展的途径。
The low frequency short－crack propegation model for 16Mng steel in hydrogen was investigsted．The crack growth rates were calculated on the basis of elasto-plastic fracture mechanics using the formula da／dN—C（△J）n．The results showed that the relation of da／dN～ △J consisted of three sections. The threshold value △Jth for crack propagation was calculated and the crack propagation path was observed by metallograpy.
参考文献
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