变形织构和晶粒尺寸对Mg-3Al-1Zn合金板材腐蚀行为的影响

Effects of Deformation Texture and Grain Size on Corrosion Behavior of Mg-3Al-1Zn Alloy Sheets.

作者信息

Li Da-Wei, Wang Hui-Yuan, Wei Dong-Song, Zhao Zheng-Xue, Liu Yan

机构信息

Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, P. R. China.

International Center of Future Science, Jilin University, Changchun 130012, P. R. China.

出版信息

ACS Omega. 2020 Jan 15;5(3):1448-1456. doi: 10.1021/acsomega.9b03009. eCollection 2020 Jan 28.

DOI:10.1021/acsomega.9b03009

PMID:32010817

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6990418/

Abstract

Effects of deformation texture and grain size on mechanical properties and corrosion behavior of the Mg-3Al-1Zn (AZ31) alloys were systematically investigated. The results revealed that the ultimate tensile strength (UTS) and fracture elongation (FE) significantly increased from 232 to 273 MPa and 12.5 to 26.4%, respectively. According to the immersion and electrochemical measurements, the results indicated that the corrosion resistance of the alloy was improved obviously. Via electron backscattered diffraction (EBSD), corrosion morphology showed that the propagation of local pitting corrosion was suppressed, which is ascribed to grain refinement, higher texture intensity, and lower dislocation density after rolling and subsequent annealing.

摘要

系统研究了变形织构和晶粒尺寸对Mg-3Al-1Zn（AZ31）合金力学性能和腐蚀行为的影响。结果表明，极限抗拉强度（UTS）和断裂伸长率（FE）分别从232MPa显著提高到273MPa，从12.5%提高到26.4%。根据浸泡和电化学测量结果，表明该合金的耐蚀性明显提高。通过电子背散射衍射（EBSD）分析腐蚀形貌发现，局部点蚀的扩展受到抑制，这归因于轧制及后续退火后晶粒细化、织构强度提高和位错密度降低。