等通道转角挤压7075铝合金的组织模拟和试验

谭险峰; 任书杰; 谢保华

doi:10.15980/j.tzzz.2015.12.007

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等通道转角挤压7075铝合金的组织模拟和试验
Microstructure Simulation and Experiment of Equal Channel Angular Extrusion 7075 Aluminum Alloy
2015年35卷第12期页码：1254-1256
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.12.007

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[1]谭险峰,任书杰,谢保华.等通道转角挤压7075铝合金的组织模拟和试验[J].特种铸造及有色合金,2015,35(12):1254-1256.

Tan Xianfeng, Ren Shujie, Xie Baohua. Microstructure Simulation and Experiment of Equal Channel Angular Extrusion 7075 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(12):1254-1256.
[1]谭险峰,任书杰,谢保华.等通道转角挤压7075铝合金的组织模拟和试验[J].特种铸造及有色合金,2015,35(12):1254-1256. DOI： 10.15980/j.tzzz.2015.12.007.

Tan Xianfeng, Ren Shujie, Xie Baohua. Microstructure Simulation and Experiment of Equal Channel Angular Extrusion 7075 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(12):1254-1256. DOI： 10.15980/j.tzzz.2015.12.007.

摘要

对7075铝合金单道次等通道转角挤压过程进行了正交试验研究

并进行了微观组织观察。试验结果表明

90°转角挤压后试样的晶粒细化效果最好。基于Zener-Hollomon参数模型

在设定初始平均晶粒尺寸40μm的前提下

采用Deform-3D软件中的Microstructure模块进行了组织演变数值模拟

分析了不同截面材料内部组织及晶粒尺寸的变化。模拟结果表明

试样头部平均晶粒尺寸为3.5μm

中部为2.4μm

尾部为29.1μm

均有不同程度的细化

其变化规律与试验结果相符合。

Abstract

The orthogonal experiment and microstructure observation of single-pass equal channel angular extrusion（ECAE）7075alloy were carried out.The experimental results indicate that the grain refinement effect exhibits desirable by using ECAE die with 90°.Based on the Zener-Hollomon parameter model and the premise of the given initial average grain size 40μm

the numerical simulation of the microstructure evolution was preformed by the Deform-3Dsoftware with microstructure module to analyze the microstructure and the grain size in the different cross section.The simulated results reveal that the average grain sizes reach 3.5μm

2.4μm

29.1μm in the top

the middle and the bottom

respectively

exhibiting refinement to some extent

which is well agreement with the experimental ones.