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Microstructure Evolution, Mechanical Properties and Corro-sion Behavior of Pure Magnesium Deformed by Shear Stress
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Affiliation:

1.School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;2.Shaanxi Key Laboratory of Biomedical Metal Materials, Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;3.Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou 510632, China;4.School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China

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Fund Project:

Key Research and Development Program of Shaanxi (2019ZDLSF03-06); National Natural Science Foundation of China (51901193)

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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.

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[Dai Xiaojun, Yang Xirong, Jing Lei, Wang Lan, Cheng Jun, Yu Sen, Wang Chang, 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.]
DOI:10.12442/j. issn.1002-185X.20200439

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History
  • Received:June 23,2020
  • Revised:July 29,2021
  • Adopted:August 04,2020
  • Online: September 07,2021
  • Published: August 31,2021