| 7150铝合金疲劳裂纹异常扩展分析 |
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| 引用本文： | 樊喜刚,蒋大鸣,王长利,乔新辉. 7150铝合金疲劳裂纹异常扩展分析[J]. 物理测试, 2006, 24(3): 51-53 |
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| 作者姓名： | 樊喜刚 蒋大鸣 王长利 乔新辉 |
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| 作者单位： | 1. 哈尔滨工业大学分析测试中心,黑龙江,哈尔滨,150001
2. 保定天威集团有限公司,河北,保定,071056 |
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| 基金项目： | 黑龙江省哈尔滨市科技攻关项目 |
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| 摘 要： | 在准备7150合金平面应变断裂韧性试样的过程中，预制疲劳裂纹发生不均匀扩展。利用扫描电镜、透射电镜和光学显微镜对断口和组织进行了分析，结果表明，晶粒组织的不均匀性是这种异常现象的主要原因。
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| 关 键 词： | 7150合金 疲劳裂纹 晶粒组织 |
| 文章编号： | 1001-0777(2006)03-0051-03 |
| 修稿时间： | 2005-12-16 |
Analysis of Abnormal Crack Propagation in 7150 Alloy |
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| FAN Xi-gang,JIANG Da-ming,WANG Chang-li,QIAO Xin-hui. Analysis of Abnormal Crack Propagation in 7150 Alloy[J]. Physics Examination and Testing, 2006, 24(3): 51-53 |
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| Authors: | FAN Xi-gang JIANG Da-ming WANG Chang-li QIAO Xin-hui |
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| Affiliation: | 1. Harbin Institute of Technology, Harbin 150001 ,Heilongjiang, China; 2. Baoding Tianwei Group Co Ltd, Baoding 071056, Hebei, China |
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| Abstract: | During the process of fracture toughness test of 7150 alloy extrusion, the prior fatigue crack initiated and propagated inhomogeneously. The fatigue crack exhibited as a fan-shaped appearance. This is attributable to the microstructural inhomogeneity of the specimen through the thickness. The regions close to the specimen surface exhibited greater resistance to initiation and propagation of fatigue crack is resulted from the smaller grain size. |
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| Keywords: | 7150 alloy fatigue crack grain structure |
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