| 3.5%NaCl中阴极极化下A537钢间歇超载疲劳断品分析 |
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| 引用本文： | 魏学军,李劲,刘素娥,柯伟.3.5%NaCl中阴极极化下A537钢间歇超载疲劳断品分析[J].金属学报,1998,34(2):146-150. |
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| 作者姓名： | 魏学军 李劲 刘素娥 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;金属腐蚀与防护国家重点实验室,沈阳,110015;中国科学院金属腐蚀与防护研究所;金属腐蚀与防护国家重点实验室,沈阳,110015;中国科学院金属腐蚀与防护研究所;金属腐蚀与防护国家重点实验室,沈阳,110015;中国科学院金属腐蚀与防护研究所;金属腐蚀与防护国家重点实验室,沈阳,110015 |
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| 基金项目： | 国家自然科学基金!59671057 |
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| 摘 要： | 测量了Ａ５３７钢在３．５％ＮａＣｌ中阴极极化条件和不同间歇超载发生频率下疲劳裂纹扩展曲线，并利用扫描电子显微镜对腐蚀疲劳断口进行观察，结果表明：超载对裂纹扩展速度及断口特征的影响取超载发生频率。当超越发生频率ＯＣＲ＝１０＾－１，１０＾－２时，间歇超载加速裂纹扩展，腐蚀疲劳断口只存在解理、沿晶等一般脆性特征：当ＯＣＲ＝１０＾－３，２×１０＾－４，１０＾－４时，间歇超载对裂纹扩展存在阻滞效应，Ａ５３７
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| 关 键 词： | 微观断口 超载 腐蚀疲劳 A537钢 氯化钢 |
| 收稿时间： | 1998-02-18 |
| 修稿时间： | 1998-02-18 |
ANALXSIS OF FATIGUE FRACTURE WITH CYCLIC OVERLOADING FOR A537 STEEL IN 3.5%NaCl SOLUTION AT AN APPLIED CATHODIC POTENTIAL |
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| WEI Xuejun,LI Jin,LIU Su'e,KE Wei.ANALXSIS OF FATIGUE FRACTURE WITH CYCLIC OVERLOADING FOR A537 STEEL IN 3.5%NaCl SOLUTION AT AN APPLIED CATHODIC POTENTIAL[J].Acta Metallurgica Sinica,1998,34(2):146-150. |
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| Authors: | WEI Xuejun LI Jin LIU Su'e KE Wei |
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| Affiliation: | WEI Xuejun,LI Jin,LIU Su'e,KE Wei (State Key Laboratory of Corrosion and Protection,Institute of Corrosion and Protection of Metals,The Chinese Academy of Sciences,Shenyang ) |
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| Abstract: | The fatigue crack propagation rate has been measured for A537 steel in 3.5%NaCl solution at an applied cathodic potential of -1400mV(SCE) under different cyclic overload occurrence ratio(OCR). The fracture surface characteristics have been analyzed by SEM. When OCR=10-l and 10-2, the crack growth was accelerated and some brittle characteristics such as cleavage and intergranular cracking were observed on the fracture surface. However, for OCR=10-3,2×10-4 and 10-4, the crack growth was retarded, and the pearlite morphology appeared on the fracture. The difference of cracking models between ferrite and pearlite in A537 steel could be the enrichment of hydrogen atoms at the interphase of ferrite and cementite. |
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| Keywords: | fracture surface overload corrosion fatigue |
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