摘要
利用Gleeble 1500热模拟机,研究轧制态6016铝合金在变形温度为300～500℃,应变速率为0.1～10 s 1以及真应变为0～0.8时高温单道次压缩过程中热变形流变应力行为。研究结果表明:6016铝合金在高温单道次压缩下的热变形经历了从应变硬化阶段过渡到稳态变形阶段的过程,其软化机制主要为动态回复;据流变应力指数函数中系数A和β与应变的关系,建立Zener-Hollomon参数的指数关系本构方程;计算所得的温升修正值与实测值较吻合。
The flow stress behavior of 6016 aluminum alloy was studied by single-pass high temperature compression experiment on Gleeble？1500 thermal-mechanical simulator at temperature of 300？500 ℃,strain rate of 0.01？10 s？1 and true strain of 0？0.8.The results demonstrate that the hot deformation behavior of 6016 aluminum alloy exhibits strain-hardening to a steady-state,and the softening mechanism is mainly controlled by dynamic recovery.The constitutive equation is presented,considering A and β as function of strain by Zener-Hollomon parameter in the exponential function form.The corrected temperatures rising are in good agreement with those of the measured values.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第12期3702-3708,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51075404)
汽车车身先进设计制造国家重点实验室开放基金资助项目(30915004)
