等温变形下柱状晶CuAlBe合金的动态再结晶行为  

Dynamic Recrystallization Behavior of CuAlBe with Columnar Grain under Isothermal Deformation

作　　者：王献[1] 蔡莲淑[1] 余业球[1] 黎沃光[1] 黄诗君[1] 

机构地区：[1]广东工业大学材料与能源学院

出　　处：《特种铸造及有色合金》2011年第5期480-482,392,共3页Special Casting & Nonferrous Alloys

基　　金：广东省自然科学基金资助项目(8151009001000001)

摘　　要：采用控温模具在万能材料试验机上对柱状晶CuAlBe合金进行了等温压缩变形试验,以研究其在不同变形温度、变形速率、变形量下发生动态再结晶的行为。结果表明,在变形速率为5mm/min时,再结晶温度随变形量的增加而降低。变形速率提高到10mm/min和20mm/min时,再结晶温度不再随变形量的增加而变化,保持在550℃。而当变形速率提高到40mm/min、变形量为35%时再结晶温度提高到600℃;随变形量的增加,再结晶温度逐渐降低到550℃。变形温度低于450℃时,晶界发生开裂。Isothermal compression of CuAlBe alloy with columnar grain was conducted with control-temperature mould on universal material tensile machine to understand effects of different deformation temperature,deformation rate and deformation degree on dynamic recrystallization behavior of the alloy.It is found that,at deformation rate of 5 mm/min,recrystallization temperature is decreased with increasing in deformation degree,however,with increasing deformation rate to 10 mm/min and 20 mm/min,it is independent of the deformation degree,keeping a constant value of 550 ℃.When deformation rate is increased to 40 mm/min with 35% deformation degree,recrystallization temperature is raised to 600 ℃.Furthermore,with increasing in deformation degree,recrystallization temperature is gradually decreased to 550 ℃.When deformation temperature is lower than 450℃,grain boundary crack occurs.

关 键 词：CUALBE 柱状晶 动态再结晶 等温变形 

分 类 号：TG111.7[金属学及工艺—物理冶金]