热处理状态对2195铝锂合金热变形行为及组织演变的影响
Effect of heat treatment on hot deformation behavior and microstructure evolution of 2195 Al-Li alloy
王睿琪 1戴国庆 1郭艳华 1孙中刚 1杨胶溪 2常辉 1刘春辉 3Igor V.ALEXANDROV 4湛利华3
作者信息
- 1. College of Materials Science and Engineering,Nanjing Tech University,Nanjing 211816,China
- 2. Institute of Laser Engineering,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China
- 3. Light Alloy Research Institute,State Key Laboratory of High-performance Complex Manufacturing,Central South University,Changsha 410083,China
- 4. Department of Materials Science and Physics of Metals,Ufa University of Science and Technology,Ufa 450008,Russia
- 折叠
摘要
2195铝锂合金在工业生产中应用广泛,不同的初始热处理状态影响其热变形行为.因此,本文旨在研究热处理状态对2195铝锂合金的组织演变和热变形行为的影响.实验在Gleeble-3800热模拟机上进行,温度范围为350～500℃,应变速率为0.01～10 s-1.将热变形后各区域的微观组织进行对比,并计算出合金的本构模型和加工图.在较高的变形温度(400～500℃)下,T3和T8试样的峰值应力基本相同,同时发现热变形后合金中存在低角度晶界(LABs)和动态再结晶.由于固溶强化和形变强化作用,2195-T8铝锂合金表现出比2195-T3铝锂合金更大的形变激活能.本文确定2195-T3和2195-T8铝锂合金的最佳热加工条件均为475～500℃和0.01～0.1 s-1.本文可为铝锂合金在后续热加工过程中设置热处理参数提供有益的帮助.
Abstract
2195 aluminum-lithium alloy has numerous applications in industrial production,and the different initial heat treatment state impacts its hot deformation behavior.Therefore,this work seeks to examine the impact of heat treatment states on the microstructure development and deformation behavior of 2195 Al-Li alloys.The experiments have been carried out on a Gleeble-3800 thermo-mechanical simulator in the temperature range 350-500℃and with a strain rate of 0.01-10 s-1.The microstructure analysis in various regions was compared,and constitutive models and processing maps of the alloys were produced.At high deformation temperatures(400-500℃),the peak stress of the T3 and T8 samples is nearly the same.Low angle boundaries(LABs)and the content of dynamic recrystallization have also been found.Due to solution strengthening and deformation strengthening effects,the 2195-T8 Al-Li alloy plate exhibited a larger deformation activation energy than the 2195-T3 Al-Li alloy.The hot working windows of the Al-Li alloys 2195-T3 and 2195-T8 were determined to be 475-500℃and 0.01-0.1 s-1,respectively.The research can serve as useful assistance for the Al-Li alloy's ideal heat treatment conditions during hot working processing.
关键词
2195铝锂合金/热变形行为/微观组织演变/热处理状态Key words
2195 Al-Li alloys/deformation behavior/microstructure evolution/heat treatment state引用本文复制引用
基金项目
National Natural Science Foundation of China(U22A20190)
Priority Academic Program Development,Jiangsu Higher Education Institution,China()
出版年
2023
NETL
NSTL
维普
万方数据