EFFECTS OF RARE EARTH MIXTURE ON MECHANICAL PROPERTIES OF  CuZnAl SHAPE MEMORY ALLOYS

Abstract

Abstract: With thehelpofquantitative metallograph ,tensiletest,electron probeandscan electron mi croscope,theinfluencesof mixture rareearth ( RE) on the grain size, dynamics of grain growth and mechanicalpropertiesof CuZnAlshape memoryalloys wereinvestigated . Theex perimentalresultsshowsthat REcanrefinegrainsgreatly,improvethe mechanicalpropertiesremarkably andchangethetensilefracturefrom brittletypebordered grainstoplastictypeinthecondition of maintainingshape memory properties. Moreover microstructuresrevealthatREwhich accumulates on the grain boundariescan restrain grains’growing. In addition, the mechanismsofrefininggrainsizeandimproving mechanicalpropertiesarealsodiscussed.

Key words: rareearth, CuZnAlalloy, mechanicalproperty, shape memory alloys

N.C.Si and S.C.Sun Departmentof Materials Engineering,Jiangsu University of Science and Technology,Zhenjiang 212013 , China. EFFECTS OF RARE EARTH MIXTURE ON MECHANICAL PROPERTIES OF CuZnAl SHAPE MEMORY ALLOYS[J]. Acta Metallurgica Sinica (English Letters), 1999, 12(4): 509-514.

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EFFECTS OF RARE EARTH MIXTURE ON MECHANICAL PROPERTIES OF CuZnAl SHAPE MEMORY ALLOYS

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