SME训练Cu-Zn-Al合金的形状记忆效应研究  

Research on Shape Memory Effects of Cu-Zn-Al Alloys Trained by SME Training

作　　者：宋之敏[1] 黄婉霞[2] 

机构地区：[1]四川大学分析测试中心,成都610065 [2]四川大学材料科学与工程学院,成都610065

出　　处：《材料热处理学报》2004年第1期23-26,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助 (59972 0 66)

摘　　要：研究了经SME训练Cu Zn Al合金的单向记忆动作敏感性、单向形状恢复率 ηO 和双向形状恢复率 ηT。结果表明 :随训练次数增加 ,单向记忆的动作敏感性快速下降 ,当训练 10次 ,No .1和No.2合金已分别下降 5 8%和 5 4 % ,然后缓慢下降和趋于稳定 ,此时与初始值相比 ,No.1和No.2合金动作敏感性分别下降 74 %和 72 % ,分别仅有初始值 2 6 %和 2 8%。这在记忆合金驱动元件设计中有重要的参考价值。随训练次数增加 ,单向形状记忆效应先急剧下降 ,然后缓慢下降至趋于稳定。基本稳定时的单向形状恢复率不到初始值的 5 0 %。然而 ,随训练次数增加 ,位错增加 ,可能引入更多择尤取向位错 ,从而促使形成更多择尤取向马氏体 ,导致双向形状记忆效应急剧上升 ,出现峰值 ,然后缓慢降至趋于稳定。Shape memory effects of the Cu-Zn-Al alloys trained with SME shape memory training method are investigated. The results show that shape memory sensitivity deteriorates with the increasing of SME training cycle numbers. The shape memory sensitivity of No.1 and No.2 alloys have lowered the 58% and 54% of original value respectively after 10 training cycles. The shape memory sensitivity at stable is only the 26% and 28% of original value respectively. It has important reference value when shape memory device is designed. The one-way shape recovery ratio ηo firstly rapidly decreases, then slowly lowers and finally contain^ stability with the increasing of the training cycle number. The shape recovery ratio ηo at stable is less than the 50% of the original shape recovery ratio ηo. But the two-way shape recovery ratio ηT firstly rapidly increases to a top, then slowly decreases and finally contains stability with the increasing of the training cycle numbers, because a large amount of dislocation increases that preferred orientation dislocation may be induced and then more preferred orientation martensite are produced.

关 键 词：CU基形状记忆合金 SME训练法 形状记忆效应 记忆动作敏感性 

分 类 号：TG139.6[一般工业技术—材料科学与工程]