| 16Mn钢焊接件疲劳裂纹萌生与扩展机理研究 |
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| 引用本文： | 李金泉.16Mn钢焊接件疲劳裂纹萌生与扩展机理研究[J].沈阳理工大学学报,2001,20(2):21-24. |
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| 作者姓名： | 李金泉 |
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| 作者单位： | 沈阳工业学院机械工程分院, |
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| 摘 要： | 对16Mn钢对焊接头的焊缝及热影响区中疲劳裂纹的萌生与扩展机理进行了研究与讨论，结果发现：疲劳裂纹的萌生与扩展与铁素体组织有关，疲劳裂纹扩展阶段裂纹尖端附近为形成于铁素体晶粒内的位错胞及亚晶，在离裂纹尖端较远处为高密度的位错缠结。
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| 关 键 词： | 焊接件 疲劳裂纹 铁素体 位错 裂纹萌生 16锰钢 裂纹扩展 |
| 文章编号： | 1003-1251(2001)02-0021-04 |
| 修稿时间： | 2001年1月21日 |
A Study on the Fatigue Crack Initiation and P ropagation Mechanism of 16Mn Steel
Welded Structure |
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| LI Jin,quan.A Study on the Fatigue Crack Initiation and P ropagation Mechanism of 16Mn Steel
Welded Structure[J].Transactions of Shenyang Ligong University,2001,20(2):21-24. |
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| Authors: | LI Jin quan |
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| Abstract: | The fatigue crack initiation and propagation mechanism of 16Mn steel welded structure are studied in this paper. The fatigue crack initiation and propagation is related to ferrite structure. In the area of crack tip at the stage of fatigue crack propagation, it is found that dislocation cell and subgrain are formed in ferrite grain, and high density dislocation tangles are far to crack tip. |
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| Keywords: | welded structure fatigue crack ferrite dislocation crack initiation and propagation |
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