航空装备用2014铝合金高温变形行为研究  

Research on high temperature deformation behavior of 2014 aluminium alloy for aviation equipment

作　　者：张思平 曹海龙 吴锡伟 田宇兴 ZHANG Siping;CAO Hailong;WU Xiwei;TIAN Yuxing(Southwest Aluminium(Group)Co.,Ltd.,Chongqing 401326;Chinalco Material Applications Research Institute Co.,Ltd.,Beijing 102209,China)

机构地区：[1]西南铝业(集团)有限责任公司,重庆401326 [2]中铝材料应用研究院有限公司,北京102209

出　　处：《铝加工》2025年第1期42-46,51,共6页Aluminium Fabrication

摘　　要：采用热压缩的方式研究航空装备用2014铝合金高温变形行为,研究其在450、470、490℃变形温度和0.001、0.01、0.07s^(-1)应变速率条件下的显微组织特征和流变应力行为。结果表明,在所有变形条件下,真应力-应变曲线为稳态流变,合金表现出良好的高温成形性。合金的流变应力随着变形温度的升高或应变速率的降低而降低。显微组织结果显示,在热变形过程中合金发生少量的动态再结晶,在原始晶粒内部产生大量的亚晶,这表明2014铝合金在热变形过程中的组织转变主要以动态回复为主。在低应变速率0.001 s^(-1)和较高温度条件下,再结晶晶粒略有增大,动态回复更加充分,晶粒内部小角度晶界的多边化程度增大。The microstructure characteristics and flow stress behavior of 2014 aluminium alloy at 450,470,490℃ and 0.001,0.01,0.07 s^(-1) strain rate were studied by hot compression method.The results show that under all deformation conditions,the true stressstrain curve is steady-state flow,and the alloy exhibits good high temperature formability.With the increase of deformation temperature or the decrease of strain rate,the flow stress of the alloy increases.The microstructure results show that a small amount of dynamic recrystallization occurs during the hot deformation process,while a large number of sub-grains are generated inside the original grain,indicating that the 2014 aluminium alloy microstrucucture transformation is mainly dynamic recovery during the hot deformation process.At low strain rate of 0.001 s^(-1) and high temperature,the recrystallized grain size increases slightly and the dynamic recovery is ampler,and the polygonization of small angle grain boundaries inside the grains increases.

关 键 词：2014铝合金 组织演变 应变速率 动态再结晶 

分 类 号：TG146.21[一般工业技术—材料科学与工程]