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代晓军,杨西荣,荆磊,王岚,程军,余森,王昌,于振涛.纯镁切应力变形后的微观组织演变、力学性能、腐蚀行为[J].稀有金属材料与工程(英文),2021,50(8):2745~2751.[Dai Xiaojun,Yang Xirong,Jing Lei,Wang Lan,Cheng Jun,Yu Sen,Wang Chang and Yu Zhentao.Microstructure Evolution, Mechanical Properties and Corro-sion Behavior of Pure Magnesium Deformed by Shear Stress[J].Rare Metal Materials and Engineering,2021,50(8):2745~2751.]
Microstructure Evolution, Mechanical Properties and Corro-sion Behavior of Pure Magnesium Deformed by Shear Stress
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Received:June 23, 2020  
DOI:
Key words: pure magnesium  ECAP  microstructure  mechanical property  corrosion behavior
Foundation item:Key Research and Development Program of Shannxi(Nos.2019ZDLSF03-06); the National Natural Science Foundation of China (Nos. 51901193)
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Dai Xiaojun,Yang Xirong,Jing Lei,Wang Lan,Cheng Jun,Yu Sen,Wang Chang and Yu Zhentao  
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Abstract:
      The close-packed hexagonal structure pure magnesium has few independent slip systems which result in poor plasticity. In the present paper, the pure magnesium was deformed by equal channel angular pressing (ECAP). Results show that due to grain refinement and weakening of base texture, plasticity of pure magnesium is significantly improved. The strength of pure magnesium decreases after ECAP deformation mainly because the influence of base texture weakening is greater than that of grain refinement. Moreover, the corrosion resistance of pure magnesium is significantly enhanced after shear stress deformation because of the increase of self-corrosion potential and corrosion current density. The corrosion mechanism of pure magnesium may change from local corrosion to uniform corrosion, which can reduce the corrosion falling and ensure the integrity of samples during immersion in the standard simulated body fluid.