中南大学学报（自然科学版）2017，Vol.48Issue(8)：1988-1994,7.DOI:10.11817/j.issn.1672-7207.2017.08.004
5083合金高温变形行为及加工图
High-temperature deformation behavior and processing map of 5083 aluminum alloy
摘要
Abstract
The flow stress features of 5083 aluminum alloy were studied by the isothermal compression of cylindrical specimen in temperature of 300-500 ℃ and strain rate of 0.01-10.0 s-1 with Gleeble-3800 simulated machine.The high temperature deformation constitutive equations and processing map were established,and furthermore,the microstructure characteristics were studied by electron back-scattered diffraction (EBSD) analysis.The results show that the flow stress increases with the increase of strain rate and decreases with the increase of deformation temperature.The dynamic recrystallization occurs at the strain rate of 10.0 s-1 and in temperature of 400-500 ℃.The flow stress of 5083 aluminum alloy can be represented by Zener-Hollomon parameter during high temperature deformation.There are two flow instability zones in the processing map when the true strain is 0.6,and the optimized deformation temperature and strain rate are 420-500 ℃ and 0.01-0.10 S-1,respectively.关键词
5083铝合金/热变形/本构方程/热加工图Key words
5083 aluminum alloy/hot deformation/constitutive equations/processing map分类
矿业与冶金引用本文复制引用
戴青松,刘栩,付平,张佳琪,邓运来..5083合金高温变形行为及加工图[J].中南大学学报（自然科学版）,2017,48(8):1988-1994,7.基金项目
广西科学研究与技术开发计划课题(桂科重1598001-2)(Project(1598001-2) supported by the Scientific Research and Technology Development Program of Guangxi) （桂科重1598001-2）
