5083铝合金的热变形组织演变及晶粒度模型*

doi:10.11896/j.issn.1005-023X.2017.014.030

《材料导报》期刊社

2017, Vol. 31

Issue (14): 143-146 https://doi.org/10.11896/j.issn.1005-023X.2017.014.030

计算模拟

5083铝合金的热变形组织演变及晶粒度模型^*

戴青松^1,2, 欧世声¹, 邓运来^1,3, 付平², 张佳琪³

1 中南大学材料科学与工程学院, 长沙 410083;
2 广西柳州银海铝业股份有限公司, 柳州 545006;
3 中南大学轻合金研究院, 长沙 410083;

Microstructure Evolution and Grain Size Model of 5083 Aluminum Alloy During Hot Deformation

DAI Qingsong^1,2, OU Shisheng¹, DENG Yunlai^1,3, FU Ping², ZHANG Jiaqi³

1 School of Materials Science and Engineering, Central South University, Changsha 410083;
2 Guangxi Liuzhou Yinhai Aluminum Co., Ltd., Liuzhou 545006;
3 Light Alloy Research Institute, Central South University, Changsha 410083;

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摘要通过等温压缩实验、光学显微镜与透射电镜研究了变形温度300~450 ℃、应变速率0.01~1 s^-1、真应变0.36~1.2范围内变形条件对5083铝合金热变形组织演变的影响。结果表明:升高热变形温度或降低应变速率均可促进5083铝合金的动态再结晶发生,使变形后5083铝合金位错密度降低,再结晶晶粒尺寸增大;随着应变量的增加,变形后合金的位错密度降低,动态再结晶程度增大。根据唯象理论的指数模型,利用线性回归方法建立了5083铝合金动态再结晶晶粒度模型,模型计算值与实测值吻合良好,平均相对误差仅为4.6%。

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关键词: 5083铝合金热变形条件微观组织动态再结晶晶粒度模型

Abstract: The influences of hot deformation condition upon the microstructure of 5083 aluminum alloy during compressing in the temperature range of 300—450 ℃, the strain rate range of 0.01—1 s^-1 and the strain range of 0.36—1.2 were studied by means of isothermal compressive deformation, optical microscopy and transmission electron microscopy. The results show that both the increase of deformation temperature and the decrease of strain rate benefit dynamic recrystallization, which results in the decrease of the dislocation density of 5083 aluminum alloy and the increase of the recrystallization grains size. With the increase of strain of 5083 aluminum alloy, the dislocation density decreases and the volume fraction of dynamic recrystallization increases. According to the exponential model of phenomenological theory and the linear regression method, the dynamic recrystallization grain size model of 5083 aluminum alloy during the thermoplastic deformation was constructed, and the model calculation value coincided well with the experimental data, as the average relative error was only 4.6%.

Key words: 5083 aluminum alloy hot deformation condition microstructure dynamic recrystallization grain size model

出版日期: 2017-07-25 发布日期: 2018-05-04

ZTFLH:

TG146.2+1

基金资助: *广西科学研究与技术开发计划课题 (桂科重1598001-2;桂科重14122001-5)

作者简介: 戴青松:男,1989年生,博士研究生,研究方向为有色金属材料加工 E-mail:244034502@qq.com 邓运来:通讯作者,男,1969年生,博士,教授,博士研究生导师,研究方向为有色金属材料加工 E-mail:luckdeng@csu.edu.cn

引用本文:

戴青松, 欧世声, 邓运来, 付平, 张佳琪. 5083铝合金的热变形组织演变及晶粒度模型^*[J]. 《材料导报》期刊社, 2017, 31(14): 143-146.
DAI Qingsong, OU Shisheng, DENG Yunlai, FU Ping, ZHANG Jiaqi. Microstructure Evolution and Grain Size Model of 5083 Aluminum Alloy During Hot Deformation. Materials Reports, 2017, 31(14): 143-146.

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https://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.014.030 或 https://www.mater-rep.com/CN/Y2017/V31/I14/143

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