INCOMMENSURATE AND COMMENSURATE PHASE TRANSITIONS IN Ti-Ni-Fe ALLOY

金属学报(英文版), 1990, 3(2): 89-92.

INCOMMENSURATE AND COMMENSURATE PHASE TRANSITIONS IN Ti-Ni-Fe ALLOY

RAO Jianxi Naval Academy of Engineering , Wuhan , China MA Ruzhang University of Science and Technology Beijing , Beijing , China HE Yusheng Tsinghua University , Beijing , China MA Ruzhang Professor , Department of Metal Physics , University of Science and Technology Beijing 100083 , Beijing , China

Keywords： incommensurate phase transition , null , null

Measurements by using the ultrasonic technique together for electric resistance verified that the first sound velocity valley on cooling is mainly due to the soft-mode of driving the com- mensurate phase transition,and the second one due to the soft-mode of driving the martensitic transformation.The starting point,R_s,and finishing point,R_f,of the commensurate phase transition of the alloy have been determined.

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INCOMMENSURATE AND COMMENSURATE PHASE TRANSITIONS IN Ti-Ni-Fe ALLOY

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