| AZ31镁合金裂纹扩展各向异性声发射特征分析 |
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| 引用本文： | 苏应虎,王小娇,李程浩,张红霞,闫志峰,李永莲.AZ31镁合金裂纹扩展各向异性声发射特征分析[J].稀有金属材料与工程,2019,48(1):177-182. |
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| 作者姓名： | 苏应虎 王小娇 李程浩 张红霞 闫志峰 李永莲 |
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| 作者单位： | 太原理工大学;先进镁基材料山西省重点实验室 |
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| 基金项目： | 国家自然科学基金(51505322 和 51175364) |
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| 摘 要： | 利用声发射技术对AZ31镁合金轧制方向和横向的疲劳裂纹扩展行为进行了研究。结果表明,镁合金疲劳裂纹扩展过程中产生的声信号撞击数与循环载荷的关系,以及撞击数上升率和应力强度因子幅的关系d C/d N-ΔK,分别与常规疲劳裂纹扩展试验结果相一致,裂纹失稳扩展临界应力强度因子幅与常规试验结果的误差分别为2.86%(裂纹沿轧制方向)和3.00%(裂纹沿横向);载荷一定时,裂纹沿横向扩展总是比沿着轧制方向扩展更慢一些,进入失稳扩展阶段更迟。微观组织显示,裂纹沿横向扩展边缘处的孪晶明显增加,断口处也表现出更明显的塑性,这对裂纹的扩展产生了阻碍,即材料在横向的抗裂性能要优于轧制方向,同时证明了利用声发射监测裂纹扩展行为的可靠性。
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| 关 键 词： | AZ31镁合金 各向异性 声发射 疲劳裂纹扩展 |
| 收稿时间： | 2017/5/23 0:00:00 |
| 修稿时间： | 2017/7/17 0:00:00 |
Anisotropic fatigue cracking behavior of AZ31 Mg alloy based on acoustic emission |
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| Yinghu Su,Xiaojiao Wang,Chenghao Li,Hongxia Zhang,Zhifeng Yan and Yonglian Li.Anisotropic fatigue cracking behavior of AZ31 Mg alloy based on acoustic emission[J].Rare Metal Materials and Engineering,2019,48(1):177-182. |
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| Authors: | Yinghu Su Xiaojiao Wang Chenghao Li Hongxia Zhang Zhifeng Yan and Yonglian Li |
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| Affiliation: | College of Materials Science and Engineering,Taiyuan University of Technology,# Yingze West Street, Taiyuan,PR China,College of Materials Science and Engineering,Taiyuan University of Technology,# Yingze West Street, Taiyuan,PR China,College of Materials Science and Engineering,Taiyuan University of Technology,# Yingze West Street, Taiyuan,PR China,College of Materials Science and Engineering,Taiyuan University of Technology,# Yingze West Street, Taiyuan,PR China,College of Materials Science and Engineering,Taiyuan University of Technology,# Yingze West Street, Taiyuan,PR China,College of Materials Science and Engineering,Taiyuan University of Technology,# Yingze West Street, Taiyuan,PR China |
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| Abstract: | |
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| Keywords: | AZ31 rolling direction Acoustic Emission Fatigue Crack Propagation |
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