Magnetic Field-Induced Martensitic Transformation and Giant Magnetostriction in Fe–Ni–Co–Ti and Ordered Fe3Pt Shape Memory Alloys
Magnetic Field-Induced Martensitic Transformation and Giant Magnetostriction in Fe–Ni–Co–Ti and Ordered Fe3Pt Shape Memory Alloys
复制标题
DOI：
10.2320/matertrans1989.41.882
复制
发表时间：
2000-08
期刊：
影响因子：
--
通讯作者：
T. Kakeshita;T. Takeuchi;T. Fukuda;T. Saburi;R. Oshima;S. Muto;K. Kishio
中科院分区：
文献类型：
--
作者：
T. Kakeshita;T. Takeuchi;T. Fukuda;T. Saburi;R. Oshima;S. Muto;K. Kishio
研究了磁场对Fe-Ni-Co-Ti和Fe3-Pt形状记忆合金马氏体相变的影响，以了解磁场诱导马氏体相变和磁场对晶区(变量)的控制。结果表明：(1)磁弹性马氏体相变(只有在外加磁场的情况下才诱发马氏体相，去掉磁场后马氏体相变回母相)。出现在一种时效的Fe-Ni-Ti-Co形状记忆合金中。诱发磁弹性马氏体相变的临界磁场随温度升高而增大。诱发马氏体的体积分数取决于磁场的强度。(2)磁场能很好地控制有序Fe3Pt马氏体态的晶区(变体)，表现出从立方母相到四方马氏体相的马氏体相转变。此外，在高达3.2 mA/m的磁场下，实现了约5×10-3的超磁致伸缩，几乎是Terfenol-D(Fe2DyxTb1-x)的3倍。
The effect of a magnetic field on martensitic transformations in Fe-Ni-Co-Ti and Fe 3 Pt shape memory alloys has been examined in order to know a magnetic field-induced martensitic transformation and a control of crystallographic domain (variant) by magnetic field. Following results were obtained: (i) Magnetoelastic martensitic transformation (martensites are induced only while a magnetic field is applied and are transformed back to the parent phase when the magnetic field is removed.) appears in an ausaged Fe-Ni-Ti-Co shape memory alloy. The critical magnetic field for inducing a magnetoelastic martensitic transformation increases with increasing temperature. Volume fraction of martensite induced depends on the strength of the magnetic field. (ii) Magnetic field controls perfectly the crystallographic domain (variant) in a martensite state of an ordered Fe 3 Pt, which exhibits a martensitic transformation from a cubic parent phase to a tetragonal martensite phase. In addition, a giant magnetostriction of about 5 x 10 -3 was realized under a magnetic field of up to 3.2 MA/m, which is nearly three times as large as that of Terfenol-D (Fe 2 Dy x Tb 1-x ).