摘要
通过动态热模拟试验测得经高效熔体处理的易拉罐用铝材高温流变应力曲线后,分别采用热变形条件与流变应力的经验半定量关系模型和 Laasraoui-Jonas 峰前理论与 Jonson-Mehl-Avrami 方程的组合模型求解该铝材的高温流变应力方程。结果表明:经验半定量关系模型忽略了热变形条件对加工硬化速率和动态软化速率的影响,难以准确地描述流变应力;而组合模型则充分考虑了这一影响因素,可以准确地描述该铝材的高温流变应力。
The semi-empirical mold and the combination mold of Laasraoui-Jonas before peak stress and Jonson-Mehl-Avrami equation are used to describe the flow stress of aluminium sheet used for easy-operr-can prepared by high-efficient melt-treatment respectively after the flow stress curves derived by dynamic thermal/ mechanical simulation experiment. The results show that The semi-empirical mold cannot describe the flow stress well because the influences of deformation conditions on the hardening rate and the dynamic softening rate are not considered adequately. The combination mold can describe the flow stress well.
出处
《机械工程材料》
CAS
CSCD
北大核心
2006年第12期66-68,75,共4页
Materials For Mechanical Engineering
基金
福建省自然科学基金(E0210011)
福建省教育厅重点资助项目(JA99123)
关键词
易拉罐
铝材
热模拟
流变应力方程
easy-open can
aluminium sheet
dynamic thermal/mechanical simulation
flow stress equation
