| 氢致脆化区开裂模型应用于计算门楹值应力强度因子 |
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| 引用本文： | 丁洪志,王新民.氢致脆化区开裂模型应用于计算门楹值应力强度因子[J].北京理工大学学报,1995,15(1):55-60. |
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| 作者姓名： | 丁洪志 王新民 |
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| 作者单位： | 北京理工大学材料科学研究中心，周口师专物理系 |
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| 摘 要： | 依据氢进入裂纹尖端区促进局部塑性流动的认识，本建议并发展了一个氢致脆化区开裂模型。首次推导出了确定氢致裂纹扩展门楹值应力强度因子以及环境氢压与门楹值应力强度因子关系的理论公式，定性和定量的分析相符于ＡＩＳＩ４３４０超高强钢的实验结果。
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| 关 键 词： | 氢脆 应力强度因子 门楹值 金属材料 开裂 |
A Model for Hydrogen Induced Embrittling Process Zone Cracking with Application to the Calculation of Threshold Stress Intensity |
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| Ding Hongzhi,Xing Xiusan,Zhu Hesun.A Model for Hydrogen Induced Embrittling Process Zone Cracking with Application to the Calculation of Threshold Stress Intensity[J].Journal of Beijing Institute of Technology(Natural Science Edition),1995,15(1):55-60. |
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| Authors: | Ding Hongzhi Xing Xiusan Zhu Hesun |
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| Abstract: | A model for hydrogen induced embrittling process sone(EPZ)of aching is proposed and developed,based on the notion that hydrogen enters the EPZ ahead of the crack-tip and promotes localized plastic now.Formulae for the threshold stass intensity factor in hydrogen assistal crack growth,KIH,and the relationships between hydrogen environment pressure and KIH are first derived.Both qualitative and quantitative analysis are in agreement with experimental data on superhigh strength steel AISI 4340. |
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| Keywords: | hydrogen embrittlement plastic flow stress intensity factor/threshold embrittling process zone |
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