Short Notes ON THE γ—ε TRANSFORMATION BELOW THE NEEL TEMPERATURE IN Fe—Mn—Si ALLOYS

• 作者: T.LIU Z.T.ZHAO
• 来源期刊: 同步辐射装置用户科技论文集
• 学科: 工学
• 关键词: 相变 FE-MN-SI合金 γ(fcc)-ε(hcp)
• 年，卷（期）: 1999,（1）
• 页码范围: 26-29
• 页数: 4页
• 分类号: TG13

摘要

There are two tpyes of phase transformations in Fe-Mn and Fe-Mn-Si alloys when the temperature is decreased,γ(fcc)→ε(hcp) martensitic transformation(MT) and paramagnetic-antiferromagnetic transition (AMT) of γ phase.From the thermodynamic point of view,the former usually appears in a slightly higher temperature range than the latter because if is generally accepted that the magnetic tansition has a suppressing effect on the thermally induced ε martensite(Sato et al.,1984.,Bogachev and Zvigintzeva,1976;Murakami et al.,1987:Yang et al.,1992) Gartstein and Robinkin(1979) even thought that the γ-ε transformation should be terminated below Neel temperature(TN) due to the decrease of free energy arising from the AMT of γ phase.However,some experimental results hae indicated the formation of ε phase below T(Li and Wayman,1994:Fujimori.1966).In the present wert.the behavor of γ-ε transformation below TN was furtherinvestigated by clectrical resistance measurements.