CHEN Lijun; ZHOU Qinyou; HONG Weiqing (Shanghai Institute of Iron and Steel Research)
Cite this article:
CHEN Lijun; ZHOU Qinyou; HONG Weiqing (Shanghai Institute of Iron and Steel Research). TRANSFORMATION OF Ni-Ti SHAPE MEMORY ALLOY. Acta Metall Sin, 1983, 19(5): 21-26.
Abstract The transformation of the equal atom Ni-Ti shape menory alloy has been studied at 150℃ by means of X-ray diffraction, internal friction, electric resistance and TEM. It was shown that two kinds of phase transformation, namely, of the martensite and the R-phase in the alloy are done between 40-50℃. The structure of martensite and of R-phase is distorted monoclinic B_(19) and B_2 respectively. The Rphase does not reveal a pre-transformation and remains relative stable till -185℃. Thus, the phase transformation in an equal atom Ni-Ti alloy takes place as:β(?)β+R+M(B_(19))(?)R+M(B_(19)).
