AZ31B镁合金铸轧板温热拉伸流变行为研究  

Rheologic behavior of TRC AZ31B Magnesium alloy sheet during warm tensile

作　　者：刘志民[1] 邢书明[1] 鲍培玮[1] 李楠[1] 姚淑卿[1] 张密兰[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院

出　　处：《特种铸造及有色合金》2008年第S1期223-225,共3页Special Casting & Nonferrous Alloys

摘　　要：由于短流程、低能耗的铸轧镁合金板材生产技术的突破,镁合金铸轧产品深加工必将成为镁合金材料应用的一个新的重要趋势。为研究AZ31铸轧镁合金板材的成形性能,通过温热力学拉伸试验得到了在应变速率为0.001~1.000s-1,变形温度为473~623K条件下的力学性能。研究发现,铸轧镁合金在变形温度为573~623K高温区,低应变速率时流变应力呈幂指数关系;而在变形温度低于573K,高应变速率时流变应力呈指数关系。微观组织分析发现,变形过程中发生动态再结晶,且晶粒尺寸随变形温度的升高而减小。Product of TRC magnesium alloy sheet will the trend of the use of for its excellent mechanic property.To get the forming characteristic of TRC AZ31B Magnesium alloy sheet warm tensile experiment was performed at deformation temperature 473 K～623 K and strain rates ranged in 0.001～1 S-1. It was observed that a in low-strain-rate and high-temperature regime the alloy follows a power-law behavior, and the relationship between flow stress and deformation temperature as well as strain rate can be represented by ...

关 键 词：铸轧 温热变形 微观组织 动态再结晶 

分 类 号：TG146.22[一般工业技术—材料科学与工程]