| 应力比和频率对低合金钢腐蚀疲劳裂纹扩展机理的影响 |
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| 引用本文： | 韩恩厚,韩玉梅,郑宇礼,柯伟.应力比和频率对低合金钢腐蚀疲劳裂纹扩展机理的影响[J].金属学报,1993,29(5):31-36. |
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| 作者姓名： | 韩恩厚 韩玉梅 郑宇礼 柯伟 |
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| 作者单位： | 中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室，中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室，中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室，中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室 博士后，沈阳110015 |
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| 基金项目： | 国家自然科学(青年)基金，中国博士后基金 |
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| 摘 要： | 在理论分析裂尖局部应变、应变速率及溶解速度的基础上、实验测定了低合金钢ZG20SiMn,SM50B—Zc的腐蚀疲劳裂纹扩展速率,并随着裂纹的扩展测定了裂纹内和裂纹尖端的pH值和金属电极电位、指出降低频率和增加应力比所导致的腐蚀疲劳裂纹扩展速率的增加部分主要来自于氢脆的加速作用
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| 关 键 词： | 腐蚀疲劳 应力比 频率 低合金钢 |
| 收稿时间： | 1993-05-18 |
| 修稿时间： | 1993-05-18 |
EFFECTS OF STRESS RATIO AND FREQUENCY ON CORROSION FATIGUE CRACK GROWTH IN LOW ALLOY STEEL |
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| HAN Yumei,ZHENG Yuli,KE Wei Corrosion Science Laboratory.EFFECTS OF STRESS RATIO AND FREQUENCY ON CORROSION FATIGUE CRACK GROWTH IN LOW ALLOY STEEL[J].Acta Metallurgica Sinica,1993,29(5):31-36. |
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| Authors: | HAN Yumei ZHENG Yuli KE Wei Corrosion Science Laboratory |
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| Affiliation: | HAN Yumei,ZHENG Yuli,KE Wei Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,ShenyangHAN Enhou,Institute of Corrosion and Prolection of Metals,Academia Sinica,Shenyang |
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| Abstract: | Based on theoretical analysis about local strain, strain rate and dissolving rateat crack tip, the corrosion fatigue crack growth rate of steels ZG20SiMn and SM50B-Zc infresh water and 3.5%NaCl respectively were measured experimentally, and the pH and elec-trode potential within crack were also measured continously along with crack propagating.The hydrogen concentration of materials in the crack tip region were measured. It showedthat the increase of corrosion fatigue crack growth rate, caused by both the decreasing fre-quency and the raising stress ratio, was mainly accelerated by hydrogen embrittlement. |
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| Keywords: | corrosion fatigue stress ratio frequency crack growth steel ZG20SiMn steel SM50B-Zc |
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