X RAY DIFFRACTION STUDY OF THE THERMALLY INDUCED γ ε MARTENSITIC TRANSFOR MATIONSINFe31 6Mn6 5Si ALLOY  

作　　者：J.X.Zhang1) , K. Tamarat2) and B. Dubois2) 1) Schoolof Material Science & Engineering ,Hebei University of Technology, Tianjin 300130 ,China2) ISMCM LISSMA,St.Ouen 93407 ,France 

出　　处：《Acta Metallurgica Sinica(English Letters)》1999年第4期645-648,共4页金属学报（英文版）

摘　　要：Thethermal induced γ εmartensitic transformation in a Fe 31 6 Mn 6 5 Si ( wt% ) alloy wasstudied by meansof X ray diffraction throughtwothermalcyclesin the83 480 Ktem perature range.Itisshownthatduringcoolingtheγ→εtransformationterminatesnotat TγNbutatalowertemperatureandtheγphaseexhibitsstrongstabilityevencoolingto83 K;like wise,εmartensiteis noticeably stable even heating up to 480 K. Atthe temperature about 275 K, an anomalousdecreaseintheintensityofthe(200)γreflections wasobserved on heat ing, whereasthe(101)εreflectionsshow ageneralvariationinintensity.Itisconsideredthat theabnormalphenomenonis probably related tothe magnetictransition of the γphase fromantiferromagnetism to paramagnetism .Thethermal induced γ εmartensitic transformation in a Fe 31 6 Mn 6 5 Si ( wt% ) alloy wasstudied by meansof X ray diffraction throughtwothermalcyclesin the83 480 Ktem perature range.Itisshownthatduringcoolingtheγ→εtransformationterminatesnotat TγNbutatalowertemperatureandtheγphaseexhibitsstrongstabilityevencoolingto83 K;like wise,εmartensiteis noticeably stable even heating up to 480 K. Atthe temperature about 275 K, an anomalousdecreaseintheintensityofthe(200)γreflections wasobserved on heat ing, whereasthe(101)εreflectionsshow ageneralvariationinintensity.Itisconsideredthat theabnormalphenomenonis probably related tothe magnetictransition of the γphase fromantiferromagnetism to paramagnetism .

关 键 词：Fe  Mn Fe  Mn  Sisystem martensitictransformation εmartensite 

分 类 号：TG13[一般工业技术—材料科学与工程]