热处理工艺和热循环次数对Ti_(50)Ni_(40)Cu_(10) 合金相变规律的影响(英文)  

Effects of Heat Treatment Processes and Thermal Cycling Times on Transformation Characteristics of Ti_(50)Ni_(40)Cu_(10) Shape Memory Alloy

作　　者：骆苏华[1] 李亚东[1] 

机构地区：[1]苏州大学,江苏苏州215006

出　　处：《有色金属》2003年第3期5-9,共5页Nonferrous Metals

摘　　要：制备Ti50 Ni4 0 Cu1 0 合金 ,并采用示差扫描量热仪 (DSC)系统分析Ti50 Ni4 0 Cu1 0 合金在不同热处理条件下 ,马氏体相变规律与相变热循环间的关系。结果表明 ,马氏体相变潜热ΔHB2→B1 9和逆马氏体相变潜热ΔHB1 9→B2 随固溶温度的升高而明显降低 ,随退火温度的升高略微降低。相变热滞、逆马氏体相变温度在热循环初期迅速降低 ,当热循环次数超过 2次时则均保持不变。逆马氏体相变潜热 (ΔHB1 9→B2 和ΔHB1 9’→B1 9)随热循环次数 (n <4)的增加有所升高 ,特别是ΔHB1 9’→B1 9增加约 48%。而热循环次数对马氏体相变温度和潜热ΔHB2→B1Ti 50 Ni 40 Cu 10 alloy is prepared and its transformation latent heats and hysteresis under conditions of various heat treatment processes and thermal cycling times are systematically investigated by differential scanning calorimeter (DSC). It is found that the reverse martensitic transformation latent heat decreases significantly with the increase of solution temperature and decreases slightly with the increase of annealing temperature. The transformation hysteresis and reverse martensitic transformation temperature decrease abruptly during the initial thermal cycling process and then keep constant with the increase of thermal cycling times over 2. The reverse martensitic transformation latent heat is increased somewhat with the increase of thermal cycling times (n<4), especially ΔH B19'-B19 is increased by about 58%. The martensitic transformation temperature and martensitic transformation latent heat almost remain constant regardless of the thermal cycling times.

关 键 词：Ti50Ni40Cu10合金 热处理工艺 热循环次数 马氏体相变 相变潜热 相变热滞 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG166.5[金属学及工艺—金属材料]