3003铝合金热变形动态再结晶临界条件的确定  

Determination of critical conditions of hot deformation dynamic recrystallization of 3003 aluminum alloy

作　　者：陈贵清[1] 傅高升[2] 程超增[2] 王火生 王军德[4] 

机构地区：[1]福建船政交通职业学院机械工程系,福建福州350007 [2]福州大学材料科学与工程学院,福建福州350108 [3]福建工程学院材料科学与工程学院,福建福州350118 [4]昌吉职业技术学院机械工程分院,新疆昌吉831100

出　　处：《材料热处理学报》2017年第11期133-139,共7页Transactions of Materials and Heat Treatment

基　　金：福建省自然科学基金(2017J01156;2017J01083);新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2016I068);福建省教育厅A类科技项目(JA15659);福建船政交通职业学院科技服务团队培育计划资助(闽交院科[2016]2号)

摘　　要：采用Gleeble-1500热模拟试验机对3003铝合金进行变形温度为300~500℃,应变速率为0.01~10.0 s-1高温等温压缩实验,利用Zener-Hollomon参数模型建立了合金热变形峰值流变应力本构模型。结合显微组织观察分析,3003铝合金热变形软化机制主要是动态再结晶,随着ln Z值的减小,动态再结晶进行得越充分;ln Z值较大时,3003铝合金热变形过程中的软化机制主要以动态回复为主,据此获得合金发生动态再结晶的临界条件为T≥400℃,ln Z≤31.98。由应变硬化速率计算合金发生动态再结晶的临界应变为ε>εc=0.00532ln Z-0.12452,其大小与Z参数成正比关系。High temperature isothermal compression test of 3003 aluminum alloy at deformation temperature of 300-500℃ and strain rate of 0. 01-10. 0 s-1 was carried out on a Gleeble-1500 thermal simulator. The peak flow stress constitutive model of the alloy was established by Zener-Hollomon parameter model. According to the observation of mierostructure, the softening mechanism of hot deformation of the 3003 aluminum alloy is mainly dynamic reerystallization（DRX）. With the decreasing of lnZ value, the dynamic recrystallization is more fully. When lnZ is high, the softening mechanism of the 3003 aluminum alloy during hot deformation is mainly dynamic recovery, and the critical condition of dynamic reerystallization of the alloy is T≥ 400 ℃ , lnZ≤ 31.98. The critical strain of dynamic recrystallization of the alloy calculated by the strain hardening rate is ε〉εc=0.00532ln Z-0.12452, its value is proportional to the Z parameter.

关 键 词：3003铝合金 本构模型 动态再结晶 临界应变 

分 类 号：TG146.2[一般工业技术—材料科学与工程]