Thermoelastic martensite in an ausaged FeNiTiCo alloy
Thermoelastic martensite in an ausaged FeNiTiCo alloy
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DOI：
10.1016/0036-9748(84)90187-x
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发表时间：
1984-10
期刊：
影响因子：
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通讯作者：
T. Maki;K. Kobayashi;M. Minato;I. Tamura
中科院分区：
文献类型：
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作者：
T. Maki;K. Kobayashi;M. Minato;I. Tamura
与形状记忆效应相关的热弹性马氏体主要在Ti-Ni、Cu-Zn、Cu-Al-Ni等有色合金中观察到。对于铁合金，仅发现两种合金表现出热弹性马氏体，即一种是有序的 Fe-约 25at%Pt（平衡 bct 中的 fcc）(1)，另一种是 Fe-约 30at%Pd（平衡 fct 中的 fcc）(2)。热弹性马氏体的特点是热滞后小，并且在正向和反向转变过程中马氏体界面发生可逆运动。目前的两位作者研究了 Fe-NiC 合金中薄板马氏体的相变特征，结果表明，Fe-Ni-C 合金中薄板马氏体的界面本质上是可移动的，并且相变在一定程度上是可逆的，尽管由于相当大的热滞后，马氏体本身通常不是热弹性的。这些结果强烈表明，即使在 Fe-Pt 和 Fe-Pd 以外的铁合金中，通过引入适当的因素来降低其热滞后，薄板铁马氏体也有可能变得热弹性。
A thermoelastic martensite which is related to a shape memory effect has been observed mainly in non-ferrous alloys such as Ti-Ni, Cu-Zn, Cu-Al-Ni. For ferrous alloys, only two alloys have been found to exhibit the thermoelastic martensite, i.e., one is an ordered Fe- about 25at%Pt (fcc in equilibrium bct)(1) and the other is an Fe- about 30at%Pd (fcc in equilibrium fct)(2). Thermoelastic martensite is characterized by a small thermal hysteresis and a reversible movement of martensite interface during forward and reverse transformation. Two of the present authors have studied the transformation characteristics of thin plate martensite in Fe-NiC alloys and shown that the interface of thin plate martensite in Fe-Ni-C alloys is essentially mobile and the transformation is somewhat reversible, although the martensite is not typically thermoelastic per se because of a fairly large thermal hysteresis. These results strongly suggest that there is a possibility that, even in ferrous alloys other than Fe-Pt and Fe-Pd, the thin plate ferrous martensite would become thermoelastic by an introduction of suitable factors for reducing its thermal hysteresis.