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材料导报  2024, Vol. 38 Issue (8): 22080187-6    https://doi.org/10.11896/cldb.22080187
  金属与金属基复合材料 |
应变速率对7065铝合金等温压缩软化机制的影响
赵言1,2, 唐建国1,2, 张勇1,2,*, 郑许1,2,3, 赵辉1,2
1 中南大学材料科学与工程学院,长沙 410083
2 中南大学有色金属材料科学与工程教育部重点实验室,长沙 410083
3 广西南南铝加工有限公司铝合金材料与加工重点实验室,南宁 530031
Effect of Strain Rate on Isothermal Compression Softening Mechanism of 7065 Aluminum Alloy
ZHAO Yan1,2, TANG Jianguo1,2, ZHANG Yong1,2,*, ZHENG Xu1,2,3, ZHAO Hui1,2
1 School of Materials Science and Engineering, Central South University, Changsha 410083, China
2 Key Laboratory of Non-ferrous Metals Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, China
3 Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys, ALG Aluminum lnc., Nanning 530031, China
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摘要 采用等温压缩实验并结合电子背散射衍射手段,研究了应变速率对7065铝合金热变形行为的影响规律。结果表明,随着应变速率由0.001 s-1增加到30 s-1,合金的动态再结晶面积分数先显著减少,在1 s-1时达到较低水平,而后变化幅度小于10%,当应变速率大于1 s-1时,合金的亚结构面积分数显著增加。低应变速率阶段(0.001～1 s-1)的软化机制为动态再结晶(DRX)机制和动态回复(DRV)机制,而高应变速率阶段(1～30 s-1)的软化机制为DRV机制。随着应变速率的增加,等温压缩变形后合金的形变储能逐渐增加。
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赵言
唐建国
张勇
郑许
赵辉
关键词:  Al-Zn-Mg-Cu合金  等温压缩  热变形  本构方程  动态再结晶(DRX)  动态回复(DRV)    
Abstract: The effect of strain rate on the hot deformation behavior of 7065 aluminum alloy was investigated by isothermal compression experiments and electron backscatter diffraction. The results show that as the strain rate increases from 0.001 s-1 to 30 s-1, the dynamic recrystallization area fraction of the alloy first decreases significantly, reaching a lower level at 1 s-1, and then the change is less than 10%, and the substructure area fraction increases significantly when the strain rate is greater than 1 s-1. The softening mechanisms in the low strain rate range (0.001—1 s-1) are dynamic recrystallization (DRX) mechanism and dynamic recovery (DRV) mechanism, while the softening mechanism in the high strain rate range (1—30 s-1) is DRV. With the increase of strain rate, the deformation stored energy of alloy after isothermal compression deformation gra-dually increases.
Key words:  Al-Zn-Mg-Cu alloy    isothermal compression    hot deformation    constitutive equation    dynamic recrystallization(DRX)    dynamic recovery(DRV)
出版日期:  2024-04-25      发布日期:  2024-04-28
ZTFLH:  TG146.2  
基金资助: 高韧高耐蚀铝合金厚板制备技术及应用研究(桂科AA22067075)
通讯作者:  *张勇,中南大学材料科学与工程学院特聘副教授、硕士研究生导师。2008年中南大学材料科学与工程专业硕士毕业,2014年澳大利亚蒙那仕大学博士毕业。主要从事高性能铝镁合金性能调控与开发的工作。参与国家“863”、国家“973”等项目10余项。发表学术论文40余篇。yong.zhang@csu.edu.cn   
作者简介:  赵言,2020年6月获得辽宁大学工学学士学位。现为中南大学材料科学与工程学院硕士研究生。目前主要研究领域为高性能铝合金的制备和加工。
引用本文:    
赵言, 唐建国, 张勇, 郑许, 赵辉. 应变速率对7065铝合金等温压缩软化机制的影响[J]. 材料导报, 2024, 38(8): 22080187-6.
ZHAO Yan, TANG Jianguo, ZHANG Yong, ZHENG Xu, ZHAO Hui. Effect of Strain Rate on Isothermal Compression Softening Mechanism of 7065 Aluminum Alloy. Materials Reports, 2024, 38(8): 22080187-6.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.22080187  或          https://www.mater-rep.com/CN/Y2024/V38/I8/22080187
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