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
金属学报(英文版)
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
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