易拉罐用铝材高温流变应力的方程描述

基金项目:

福建省自然科学基金资助项目(E0210011)

福建省教育厅重点资助项目(JA99123)

详细信息

The Description of Flow Stress Equation at Elevated Temperature for Aluminium Sheet Used for Easy-open-can

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.
- 易拉罐 /
- 铝材 /
- 热模拟 /
- 流变应力方程
Abstract: 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-open-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.
- easy-open can /
- aluminium sheet /
- dynamic thermal/mechanical simulation /
- flow stress equation

[1]	宁洪囤.易拉罐用国产铝材的现状[J].铝加工,1994,17(4):40-43.
[2]	傅高升,陈文哲,陈鸿玲,等.铝熔体高效净化的理论及净化处理技术的现状分析[J].铸造技术,2004,25(4):290-292.
[3]	FU Gaosheng,SHUN Fengshang,REN Liying,et al.Modification behavior of trace rare earth on impurity phases in commercial purity aluminum[J].Journal of Rare Earths,2002,20(1):61-66.
[4]	傅高升,陈文哲,钱匡武.高效铝熔体综合处理技术及其效果[J].中国有色金属学报,2001,12(2):269-274.
[5]	陈永禄.经高效熔体处理的易拉罐用铝材微观组织与力学性能研究[D].福州:福州大学,2002.
[6]	Klepazko J R.A practical stress-strain-strain rate-temperature constitutive relation of the power form[J].J Mech Work Technol,1987,15:143-165.
[7]	Lassaroui A,Jonas J J.Prediction of steel flow stress at high temperatures and strain rates[J].Metallurgical Transactions A,1991,22A(7):1545-1558.
[8]	王火生,傅高升,陈文哲,等.经高效熔体处理的易拉罐用铝材的高温流变应力行为[J].福建工程学院学报,2005,3(1):57-60.
[9]	王火生.易拉罐用铝材高温变形的流变应力行为及微观组织特征[D].福州:福州大学,2004.
[10]	Zener C,Hollomon J H.Effect of strain rate upon plastic flow of steel[J].J Appl Phys,1944,15(1):22-32.
[11]	Avrami M.Kinetic of phase change (Ⅰ)-General theory[J].Journal of Chemical Physics,1939,(7):1103-1112.