Co-Ni-Al合金不仅可以作为铁磁性形状记忆合金,也是传统和高温形状记忆合金的候选材料,本文通过金相显微分析,DSC和VSM方法,研究了Co40Ni33.5Al26.5合金马氏体相变和Curie点随淬火温度变化的情况,结果发现该合金马氏体相变温度和Curie点与淬火温度成正比关系.马氏体相变的4种温度,即Ms、Mf、As和At基本平行变化,淬火温度每升高10℃,马氏体相变温度升高8～9℃,而Curie点升高6～7℃.其马氏体相变温度和Curie点随淬火温度的变化与基体相β的成分变化有关,β相中Al的含量随淬火温度升高而降低,因而马氏体相变温度和Curie点升高.并且发现随着淬火温度升高,Co40Ni33.5Al26.5合金马氏体相的磁晶各向异性有减弱的倾向.
参考文献
| [1] | Kainuma R;Ise M et al.Phase euqilibria and microstructural control in Ni-Co-Al system[J].Intermetallics,1996,4:151. |
| [2] | Enami K;Nenno S .Memory effect in Ni-36.8 at.pct Al martensite[J].Metallurgical and Materials Transactions,1971,2:1487. |
| [3] | Litvinov V S;Arkhangel' skaya A A .Martensitic transformation inβ alloys of Ni-Co-Al[J].Physics of Metals and Metallography,1978,44(04):131. |
| [4] | Karaca H E;Karaman I et al.Recoverable stress-induced martensitic transformation in a ferromagnetic CoNiAl alloy[J].Scripta Materialia,2003,49:831. |
| [5] | Oikawa K;Wulff L et al.Promising ferromagnetic Ni-Co-Al shape memory alloy system[J].Applied Physics Letters,2001,79:3290. |
| [6] | Oikawa K;Ota T et al.Phase Equilibria and Phase Transformations in New B2-type Ferromagnetic Shape Memory Alloys of Co-Ni-Ga and Co-Ni-Al Systems[J].Materials Transactions,2001,42:2472. |
| [7] | Luo F H;Oikawa K et al.Martensitic phase and magnetic transition of Co41Ni32Al27-xSix alloy[J].Acta Metallurgica Sinica,2005,41(07):680. |
| [8] | Patoor E;El Amrani M et al.Determination of the origin for the dissymmetry observed between tensile and compression tests on shape memory alloys[J].Journal de Physique,1995,5:2-495. |
| [9] | Hamilton R F;Sehitoglu H et al.Thransformation of Co-Ni-Al single crystals in tension[J].Scripta Materialia,2005,53:131. |
| [10] | Efstathiou C;Sehitoglu H .Large reduction in critical stress in Co-Ni-Al upon repeated transformation[J].Scripta Materialia,2004,51:979. |
| [11] | Oikawa K;Omori T et al.Development of the Co-Ni-Al ferromagnetic shape memory alloys[J].Journal of Physics Ⅳ,2003,112:1017. |
| [12] | Tanaka Y;Ohmori T et al.Ferromagnetic Co-Ni-Al Shape Memory Alloys with Two-Phase Structure[J].Materials Transactions,2004,45(02):427. |
| [13] | Fujita A;Morito H .Magnetocrystalline anisotropy in a singlevariant Co-Ni-Al ferromagnetic shape memory alloy[J].MATERIALS TRANSACTIONS,2003,44:2180. |
| [14] | Omori T;Sutou Y et al.Shape memory effect in ferromagnetic Co-14at% Al alloy[J].Scripta Materialia,2005,52:565. |
| [15] | Wuttig M.;Tsuchiya K.;James RD.;Liu LH. .Occurrence of ferromagnetic shape memory alloys (invited)[J].Journal of Applied Physics,2000(9 Pt.2):4707-4711. |
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