Investigation of the hot compression behavior of the Mg-9Al-1Zn alloy using EBSP analysis and a cellular automata simulation

被引：12

作者：

Ding, Hanlin ^{[1
]}

Liu, Liufa ^{[1
]}

Kamado, Shigeharu ^{[2
]}

Ding, Wenjiang ^{[1
]}

Kojima, Yo ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200030, Peoples R China

[2] Nagaoka Univ Technol, Dept Mech Engn, Niigata 9402188, Japan

来源：

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING | 2009年 / 17卷 / 02期

基金：

中国国家自然科学基金;

关键词：

HIGH-TEMPERATURE DEFORMATION; DYNAMIC RECRYSTALLIZATION; MAGNESIUM ALLOY; MICROSTRUCTURAL EVOLUTION; 2-STAGE DEFORMATION; GRAIN-GROWTH; SUPERPLASTICITY; DUCTILITY; RECOVERY; TEXTURE;

D O I：

10.1088/0965-0393/17/2/025009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the flow behavior of the magnesium alloy AZ91 during hot compression with dynamic recrystallization (DRX) is studied by the electron back-scattered diffraction pattern (EBSP) method and a two-dimensional cellular automata (CA) simulation. The flow behavior characteristics of the alloy during compression are studied and analyzed in detail. The influence of second phase particles on the accumulation of dislocation and the migration of grain boundaries during the compression process are taken into account in the CA model. The current CA simulation results agree well with the experimental data in terms of both flow stress and microstructure evolution, suggesting that the proposed CA model is a reliable numerical approach for studying the DRX process of the AZ91 alloy. The simulated results show that the average size of the recrystallized grains increases to a peak value and then slowly reduces to a steady value due to simultaneous multi-cycle recrystallization during hot compression of the AZ91 alloy.

引用

页数：14

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