Influence of Electrostatic Field on the Microstructure and Mechanical Properties of AZ91 Mg Alloy during Ageing Treatment

被引：1
|
作者：
Liu, Meijuan [1 ]
Sun, Ming [1 ]
Zhang, Binghui [1 ]
Xia, Zhengwen [2 ]
Guo, Minghao [1 ]
机构：
[1] Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China
[2] Zhejiang TPCO JIULI Composite Met Co Ltd, Res & Dev Ctr Bimetal Composite Tube Forming, Huzhou City 313012, Zhejiang, Peoples R China
来源：
ADVANCED ENGINEERING MATERIALS | 2021年 / 23卷 / 01期
基金：
中国国家自然科学基金;
关键词：
AZ91; electrostatic fields; heat treatment; magnesium alloys; mechanical properties; AL-ZN ALLOYS; ELECTRIC-FIELD; DISCONTINUOUS PRECIPITATION; MAGNESIUM ALLOY; CHEMICAL NANOANALYSIS; GRAIN-REFINEMENT; MAGNETIC-FIELD; BEHAVIOR; SI; SUPPRESSION;
D O I：
10.1002/adem.202000407
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of electrostatic field on the microstructure and mechanical properties of AZ91 alloy during ageing treatment are studied. It is shown that electrostatic field can modify the precipitate distributions. With the help of electrostatic field (intensity 4 kV cm(-1)), the continuous precipitate (CP) is refined, whereas the discontinuous precipitate (DP) is suppressed to some extent. The tensile yield strength of peak-aged AZ91 alloy is improved from 156 to 169 MPa. The mechanism by which the electrostatic field modifies the precipitate distributions is discussed via the resistivity data combined with the classical theory of vacancy-dominant diffusion. It is shown that the electrostatic field probably enhances the bulk diffusion and then improves the competitiveness of CP against DP.
引用
收藏
页数：11
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