Cu-24Al-3Mn合金β_1母相非等温时效效应  

The effect of non-isothermal aging on β_1-phase stability of Cu-24Al-3Mn alloy

作　　者：潘志勇[1] 李周[1] 汪明朴[1] 邓楚平[1] 黎三华[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《材料热处理学报》2006年第5期26-29,共4页Transactions of Materials and Heat Treatment

基　　金：教育部博士点基金(20040533069);人事部博士后基金(2004036427)

摘　　要：利用电阻-温度曲线测量,X射线衍射,金相观察等方法研究了Cu-24Al-3Mn合金β1母相非等温时效效应。结果表明,该合金具有很强的抗母相时效分解性能,以10℃/min速度加热至620℃时,合金仍具有良好的热弹性马氏体转变特性,可逆马氏体转变量高达92%以上。时效初期,马氏体相变点有所上升,但上升幅度仅10-15℃,后期变化不大。该合金母相状态时效时,析出相为γ2相。The effect of non-isothermal aging on the β_1-phase stability of Cu-24Al-3Mn alloy was studied by means of measurement of ρ-T curve,X-ray diffraction and optical microscope observation.It is convinced that the tested alloy has a strong resistance to parent phase decomposition.The alloy exhibits a good thermoelastic martensite transformation characteristics after heating to 620 ℃ at the heat-rate of 10 ℃/min,the reversible martensite transformation amount is up to 90%.The martensite characteristic temperature slightly rises and the rising amplitude is only 10-15℃ during early period aging,and is almost unchanged during later aging.The precipitated phase of the aged alloy with β_1-phase is γ_2-phase.

关 键 词：Cu—Al-Mn形状记忆合金 β1相 非等温时效 γ2相 

分 类 号：TG139.6[一般工业技术—材料科学与工程]