The role of twinning-detwinning on fatigue fracture morphology of Mg-3%Al-1%Zn alloy

被引：158
|
作者：
Yin, S. M. [1 ,2 ]
Yang, F. [1 ]
Yang, X. M. [1 ]
Wu, S. D. [1 ]
Li, S. X. [1 ]
Li, G. Y. [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] Shenyang Inst Chem Technol, Shenyang 110142, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 494卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Twinning and detwinning; Low cycle fatigue; Fracture morphology;
D O I：
10.1016/j.msea.2008.04.056
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Typical fracture morphology of Mg-3%Al-1%Zn (AZ31) alloy after low cycle fatigue was investigated using SEM and optical microscope. It is shown that prolific lamellar Structure in the crack initiation and Crack stable propagation zone mainly results from twinning,while dimple structure formed in the unstable crack propagation and final rupture zone is mainly due to slip. The formation mechanisms of corresponding morphologies are proposed based on twinning and detwinning processes during compressive and tensile loading half cycles, respectively, for this alloy. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：397 / 400
页数：4
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