形状记忆合金相变温度常用测量方法的比较研究  

Comparison Study on Measurement Methods for Transformation Temperatures of Shape Memory Alloy

作　　者：罗洪艳[1] 牟波[1] 廖彦剑[1] 胡南[1] 刘霞[1] 

机构地区：[1]重庆大学生物工程学院,重庆400030

出　　处：《材料导报》2009年第18期57-60,共4页Materials Reports

基　　金：重庆市自然科学基金(2007BB5146;2007BB5165);重庆市"十一五"科技重大专项"新型医疗器械"(2008AA5010)

摘　　要：采用差示扫描量热法(DSC)、电阻法和应用负载法对热处理后的NiTi记忆合金丝试样的相变温度进行了测试对比,探讨了3种测量方法的准确性、一致性和适用性。结果表明,电阻法和应用负载法测得的相变温度相近,而DSC测得的相变温度与它们相差超过20℃。同时,测试次数对前2种方法的测量结果有一定影响,而负载大小和形变模式与应用负载法的测量结果相关。The accuracy, coherence and applicability of differential scanning calorimetry（DSC）, the electrical resistance method and the applied loading method are investigated to determine the transformation temperatures of the heat treated NiTi shape memory alloy（SMA） wire samples. The results show that the transformation temperatures given by DSC are 20℃ higher than those given by the other two methods, which are similar. Moreover, the number of tests has some influence on the transformation temperatures obtained by the electrical resistance method and the applied loading method, while loading magnitude and deformation mode are also relevant to the latter.

关 键 词：NITI记忆合金 相变温度 差示扫描量热法 阻抗法 应用负载法 

分 类 号：TG139.6[一般工业技术—材料科学与工程]