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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(英文),2019,48(1):177~182.[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.]
Anisotropic fatigue cracking behavior of AZ31 Mg alloy based on acoustic emission
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Received:May 23, 2017  Revised:July 17, 2017
DOI:
Key words: AZ31  rolling direction  Acoustic Emission  Fatigue Crack Propagation
Foundation item:国家自然科学基金(51505322 和 51175364)
Author NameAffiliation
Yinghu Su,Xiaojiao Wang,Chenghao Li,Hongxia Zhang,Zhifeng Yan and Yonglian Li  
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Abstract:
      Fatigue crack propagation experiment of AZ31 magnesium alloy in different direction were conducted accompanied by acoustic emission monitoring, and the results presented similarities with the conventional results. Acoustic emission hit counts has a liner relationship with the stress intensity factor range during the stable cracking stage, and the turning point of dC/dN-ΔK curves had error of 2.86%(along the rolling direction)and 3.00% (vertical to the rolling direction) with that of da/dN-ΔK. The crack along the rolling direction propagated slower than another direction, and the reason could be listed as follows: there was obvious quasi-cleavage fracture and more twins when the crack propagated vertical to the rolling direction, which could stop cracking at some extent. So the crack resistance of rolling direction below another direction. and acoustic emission technique was a practical method to study the fracture behavior.