化铣用2024铝合金热变形行为及组织影响研究  

Hot Deformation Behavior and Microstructure Influence of 2024 Aluminum Alloy for Chemical Milling

作　　者：陈忱[1] 朱怡超[1] 邱晨阳 何元东 何志平[1] 李文智 CHEN Chen;ZHU Yichao;QIU Chenyang;HE Yuandong;HE Zhiping;LI Wenzhi(China Helicopter Research and Development Institute,Tianjin 300450;Southwest Aluminum(Group)Co.,Ltd.,Chongqing 400050)

机构地区：[1]中国直升机设计研究所,天津300450 [2]西南铝业(集团)有限责任公司,重庆400050

出　　处：《特种铸造及有色合金》2024年第12期1717-1719,共3页Special Casting & Nonferrous Alloys

摘　　要：采用Gleeble-1500型模拟机在变形温度为350~480℃、应变速率为0.01~10.0 s-1条件下进行热压缩模拟试验,得到了化铣用2024铝合金在不同温度和应变速率下的真应力-真应变曲线。采用金相显微镜(OM)和透射电镜(TEM)观察合金热变形后的显微组织。结果表明,化铣用2024铝合金的最佳热变形温度为450℃左右。这主要是由于在450℃时,该材料发生动态再结晶,位错密度大大降低,使其表现出最小的变形抗力及最大的极限变形量。The hot compression simulation experiments were carried out by the Gleeble-1500 simulation machine at deformation temperature of 350~480℃and strain rate of 0.01~10.0 s−1,and true stress-strain curves of 2024 aluminum alloy for chemical milling were presented.The microstructure of alloy after hot deformation was observed by metallographic microscope(OM)and transmission electron microscope(TEM).The results indicate that the optimal hot deformation temperature of 2024 aluminum alloy for chemical milling is about 450℃,which is mainly attributed to the great reduction of dislocation density caused by dynamic recrystallization,leading to the minimum deformation resistance and maximum ultimate deformation amounts.

关 键 词：2024铝合金 热压缩 变形温度 应变速率 显微组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]