(1. 江蘇大學(xué) 材料科學(xué)與工程學(xué)院，鎮(zhèn)江 212013；
2. 鎮(zhèn)江憶諾唯記憶合金有限公司，鎮(zhèn)江 212009)
摘 要: 研究了預(yù)應(yīng)變量、熱處理工藝和循環(huán)介質(zhì)對不同相變溫度CuZnAl形狀記憶合金形狀記憶效應(yīng)的影響。結(jié)果表明：盡管預(yù)應(yīng)變量、熱處理工藝及訓(xùn)練介質(zhì)均不同，但回復(fù)率均隨循環(huán)次數(shù)的增加先上升而后下降，相變溫度(361 K以上)高的合金回復(fù)率偏低；隨著冷熱循環(huán)訓(xùn)練次數(shù)的增加，合金的馬氏體轉(zhuǎn)變開始溫度(Ms)和奧氏體轉(zhuǎn)變結(jié)束溫度(Af)均有所提高，其Mf和As均有所降低；經(jīng)過熱循環(huán)之后，相變溫度(361 K以上)高的合金的相變溫度的幅度提高較大，且具有較大的熱滯。
關(guān)鍵字: CuZnAl形狀記憶合金；預(yù)應(yīng)變量；相變溫度；記憶效應(yīng)；冷熱循環(huán)；熱處理工藝
（1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2. Zhenjiang Innov Alloy Co. Ltd., Zhenjiang 212009, China）
Abstract: The effects of different pre-strains, heat treatments and mediums on the shape memory effect of CuZnAl alloys with different transformation temperatures were studied. The results show that the recovery rate increases firstly, then decreases with increasing cycling number, although the pre-strain, heat treatment and medium vary, respectively. The recovery rate is relatively low when the transformation temperature is higher than 361 K. The Martensite transformation starting temperature Ms and Austenite transformation finish temperature Af increase with increasing cycling number. But both Mf and As decline. After thermal cycling, for the alloy with high transformation temperature (above 361K), the range of transformation temperature is enlarged, and the thermal hysteresis is large.
Key words: CuZnAl shape memory alloys; pre-strain; transformation temperature; shape memory effect; thermal cycling; heat treatment process
