Research of initial dynamic recrystallisation for AZ31 alloy with pulse current

被引:11
作者
Chu, X. R. [1 ]
Lin, S. X. [1 ]
Yue, Z. M. [1 ]
Gao, J. [1 ]
Zhang, C. S. [2 ]
机构
[1] Shandong Univ, Sch Mech Elect & Informat Engn, Weihai 264209, Peoples R China
[2] Shandong Univ, Key Lab Liquid Solid Struct Evolut Proc Mat, Minist Educ, Jinan 250061, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Pulse current; AZ31; alloy; One-parameter approach; Critical condition; Dynamic recrystallisation; ROLLED MG-9AL-1ZN ALLOY; ELECTROPULSING TREATMENT; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEMPERATURE; EVOLUTION; COPPER; STEEL; STRIP;
D O I
10.1179/1743284715Y.0000000013
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Tensile tests with pulse current for AZ31 alloy under room temperature and different voltages were carried out. Pulse current influence on the critical condition of initial dynamic recrystallisation for AZ31 alloy was investigated. The critical value was determined by one-parameter approach and validated by metallographic observation. The results showed that, with current voltage increased, the ultimate strength decreased, and the amount of strain hardening before reaching the ultimate strength decreased. When the voltage increases, high dynamic recrystallisation degree can be obtained, but due to the high electroplastic effect, the dynamic recrystallisation grain grows up and the material mechanical property deteriorates. The microstructure observation proved that the critical condition for initial dynamic recrystallisation can be determined with the one-parameter approach.
引用
收藏
页码:1601 / 1606
页数:6
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