新型建筑用铝锰合金的热变形行为  

Hot deformation behavior of new type Al-Mn alloy for building

作　　者：孙国宁[1] 徐萌波 马文宇 罗志锋 Sun Guoning;Xu Mengbo;Ma Wenyu;Luo Zhifeng(School of Civil Engineering,Xijing College,Xi'an Shaanxi 710023 ,China;College of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an Shaanxi 710049,China)

机构地区：[1]西京学院土木工程学院,陕西西安710023 [2]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《金属热处理》2019年第5期138-143,共6页Heat Treatment of Metals

基　　金：国家自然科学基金(51275393);陕西省重点研发计划项目(2018-GX-C05)

摘　　要：在Gleeble-3800热模拟试验机对新型Al-Mn-Er-Zr合金屋面板进行了高温热压缩变形,研究了变形温度350～550℃、应变速率0. 01～10 s^(-1)范围内的热变形行为,建立了热变形本构方程和热加工图。结果表明,建立的热变形本构方程计算得到的峰值应力与实测值基本吻合,峰值应力实测值和计算值的误差在6%以内,可以较好地对Al-Mn-Er-Zr合金的高温流变行为进行预测; Al-Mn-Er-Zr合金在变形温度450～550℃、应变速率为0. 1 s^(-1)时不会发生流变失稳,且功率耗散因子较大,较容易热加工,为适宜的热加工区域。A new type of Al-Mn-Er-Zr alloy roof panel was subjected to high temperature hot compression deformation on a Gleeble-3800 thermal simulator,the hot deformation behavior of the roof panel in the range of deformation temperature 350-550 ℃ and strain rate 0.01-10 s^-1 was studied,the constitutive equation of hot deformation and the processing map were established.The results show that the peak stress calculated by the constitutive equation is basically consistent with the measured value,and the error between the measured value and the calculated value is less than 6%,the rheological behavior of the Al-Mn-Er-Zr alloy at high temperature can be well predicted.When the deformation temperature is 450-550 ℃ and the strain rate is 0.1 s^-1,rheological instability of the Al-Mn-Er-Zr alloy will not occur,and the power dissipation factor is large,corresponding to easy hot-work and suitable for hot-working area.

关 键 词：铝锰合金 变形温度 变形速率 本构方程 加工图 

分 类 号：TU512.4[建筑科学—建筑技术科学]