Strain glass in defect-containing ferroelastic Ti_(44)Ni_(51)Nb_5 alloy  

作　　者：Guang-Yue Liao Bin Chen Qing-Kun Meng Min-Juan Wang Xin-Qing Zhao 

机构地区：[1]School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics

出　　处：《Rare Metals》2015年第12期829-832,共4页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51271010)

摘　　要：An abnormal phenomenon was investigated in Ti₄₄Ni₅₁Nb₅ alloy which exhibits an absence of martensite transformation and a negative temperature dependence of electrical resistivity with the temperature decreasing. X-ray diffraction (XRD) analysis shows the matrix phase keeps a B2 structure during cooling without a martensite transformation, and dynamic mechanical analysis displays a frequency-dependent AC modulus/loss anomaly at T _g according to Vogel-Fulcher relation. Simultaneously, transmission electronic microscope (TEM) analysis manifests the superlattice spots at near 1/3 commensurate position, implying an existence of strain nanodomains with an R-like structure. And above experiment results provide evidence for the “strain glass” transition in defect-containing ferroelastic Ti₄₄Ni₅₁Nb₅ alloy.An abnormal phenomenon was investigated in Ti₄₄Ni₅₁Nb₅ alloy which exhibits an absence of martensite transformation and a negative temperature dependence of electrical resistivity with the temperature decreasing. X-ray diffraction (XRD) analysis shows the matrix phase keeps a B2 structure during cooling without a martensite transformation, and dynamic mechanical analysis displays a frequency-dependent AC modulus/loss anomaly at T _g according to Vogel-Fulcher relation. Simultaneously, transmission electronic microscope (TEM) analysis manifests the superlattice spots at near 1/3 commensurate position, implying an existence of strain nanodomains with an R-like structure. And above experiment results provide evidence for the “strain glass” transition in defect-containing ferroelastic Ti₄₄Ni₅₁Nb₅ alloy.

关 键 词：Strain glass transition Defect-containing TiNiNb Shape memory alloy 

分 类 号：TG139.6[一般工业技术—材料科学与工程]