冷变形铝合金再结晶热效应及其机理  

Thermal effect on recrystallization of cold-deformed aluminium alloy and its mechanisms

作　　者：于庆波[1,2] 孙莹[1] 杨根喜[1] 赵彦君 张敏达 刘相华[2] 

机构地区：[1]徐州工程学院江苏省大型工程装备检测与控制重点建设实验室,江苏徐州221008 [2]东北大学研究院,辽宁沈阳110189 [3]江苏常铝铝业股份公司技术中心,江苏常熟215532

出　　处：《材料热处理学报》2013年第9期42-46,共5页Transactions of Materials and Heat Treatment

基　　金：江苏省第四期"333工程"培养资金资助项目(BRA2011037);江苏省"六大人才高峰"资助项目(2012-ZBZZ-007);住房与城乡建设部研究开发项目(2013-K4-28);徐州工程学院校级科研项目(XKY2012101;XKY2012211)

摘　　要：采用差示扫描量热仪对冷变形1052铝合金进行热分析,发现在低于熔点的某一温度区间出现放热峰,经退火实验证明:放热现象由冷变形铝合金发生再结晶所引起,将其称为"再结晶焓"。另外,根据热力学推导出当形变金属发生再结晶时焓变大于零,这也从理论证明了再结晶是放热反应。A thermal analysis experiment of cold deformed aluminum alloy 1052 was carried out using differential scanning calorimetry instrument, it was found that an exothermic peak appeared in a certain temperature range below the melting point. The annealing experiments show that the heat called recrystallization enthalpy in this paper results from the recrystallization of cold deformed aluminum. In addition, it is obtained that the enthalpy change of metal is greater than zero when the recrystallization occurs, which also proves recrystallization is exothermic from theory.

关 键 词：DSC分析 再结晶焓 熵变 焓变 

分 类 号：TG146.2[一般工业技术—材料科学与工程]