AZ61镁合金高温变形行为及热加工图  

Hot Deformation Behavior and Processing Map of AZ61 Magnesium Alloy

作　　者：张蓉[1,2] 钱书琨[1] 

机构地区：[1]湖南工学院机械工程学院 [2]湖南科技经贸职业学院机电工程学院

出　　处：《特种铸造及有色合金》2014年第1期19-22,共4页Special Casting & Nonferrous Alloys

摘　　要：采用Gleeble-1500热模拟试验机对AZ61镁合金在变形温度为250~400℃、应变速率为0.001~10.000s-1条件下进行热压缩试验,研究了合金的热压缩变形行为及热加工图。结果表明,合金在高应变速率（10.000s-1）变形条件下具有较高的能量耗散率;该工艺范围内动态再结晶同时在初始晶界和孪晶上发生,合金具有较高的再结晶程度。因此,变形温度为250~400℃、应变速率为10.000s-1是较好的热加工工艺。Hot compression of AZ61 magnesium alloy was conducted on the Gleeble-1500hot-simulator at 250~400℃ and 0.001~10s-1,and the deformation behavior and processing map of the AZ61 alloy were investigated.The results show that ZA61 alloy deformed at strain rate of 10s-1 exhibits higher power dissipation,and dynamic recrystallizaton（DRX）occurs extensively both at the grain boundaries and twins,consequently resulting in a more homogeneous DRX grains.Therefore,the optimized processing parameters of AZ61 alloy are the temperature range of 250~400℃ and strain rate of 10s-1.

关 键 词：AZ61镁合金 热压缩变形 加工图 显微组织 动态再结晶 

分 类 号：TG146.22[一般工业技术—材料科学与工程]