| 焊接热影响区晶粒尺寸对腐蚀疲劳裂纹扩展机理的影响 |
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| 引用本文： | 刘顺洪,李志远.焊接热影响区晶粒尺寸对腐蚀疲劳裂纹扩展机理的影响[J].热加工工艺,1994(3):13-16. |
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| 作者姓名： | 刘顺洪 李志远 |
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| 作者单位： | 华中理工大学 |
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| 摘 要： | 利用焊接热模拟技术，研究了焊接热影响区粗晶区内不同晶粒尺寸对腐蚀疲劳裂纹扩展的影响，得出了在模拟海水条件下，Ａ５３７钢热影响区组织的ｄａ／ｄＮ－△Ｋ关系曲线，认为断口粗糙度对裂纹扩展速率有很大影响，同时发现在自腐蚀电位条件下，对应力腐蚀不敏感的材料，也会产生应力腐蚀疲劳。
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| 关 键 词： | 焊接热影响区 腐蚀疲劳 裂纹扩展 |
Influence of HAZ Grain Sizes on Corrosion Fatigue Crack Growth Mechanism |
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| Liu Shunhong,Li Zhiyuan, Lin Zhaofeng.Influence of HAZ Grain Sizes on Corrosion Fatigue Crack Growth Mechanism[J].Hot Working Technology,1994(3):13-16. |
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| Authors: | Liu Shunhong Li Zhiyuan Lin Zhaofeng |
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| Affiliation: | Liu Shunhong;Li Zhiyuan; Lin Zhaofeng |
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| Abstract: | The effect of grain sizes in the coarse-grained region of HAZ on the mechanism of the corrosion fatigue crack growth is studied with thermal simulation technique. It is srggested that the fracture surface roughness hasa great effect on the crack growth rate under the condition of NaCl 3. 5% solution. And it is found that under selfcorrosion potential condition materials that are not sensitive to stress-corrosion will still show the stress-corrosionfatigue behavior. |
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| Keywords: | stress corrosion fatigue crack growth rate HAZ |
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