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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 5    No. 1    March 1995

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PHASE TRANSFORMATIONS IN RAPIDLY SOLIDIFIED
TINi SHAPE MEMORY  ALLOYS①
Wang  Shidong1,Wu  Xiaozhen1;Jin  Jialin2

1.Analyticand7’estingCenter,SoutheastUniversity,Nanjing210018
2.ShanghaiSteelandIronInstitute,Shanghai 200940

Abstract:The transformation behaviors assoeiated with R-phase and martensirie transformations inrapidly solidified TINi shape memory alloys have been studied systematieally using differential seanning  calorimetry,X-raydiffraetion,ete .It was found that rapid solidifieation  more signifieantly  depresses  the temperature ranges of R-phase and martensitc transformations than solutlon treatment and makes it possible that the martensite  transformation 15 separated from R-phase transformation. After aging the rapidly solidified Ni-rich TINi binary shape memory alloy the martensite can be seperated from the R-phase in not only the forward but also reverse transformations. With increasing aging time both the forward and reverse transformation temperature range so fmartensite and R-phase

 

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ISSN 1672-7029
CN 43-1423/U

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