为了明确具有ε马氏体转变的Co-Ni基合金形状记忆效应的来源,通过控制不同变形温度,在Co-30Ni合金中获得不同数量的热诱发ε马氏体,在此基础上利用OM和XRD研究了变形时预先存在的热诱发ε马氏体的演化及其对应力诱发ε马氏体转变的影响,并采用弯曲法表征了合金的形状记忆效应.结果表明:合金的形状记忆效应都随热诱发和应力诱发ε马氏体数量的增加而升高,但原位金相未观察到热诱发ε马氏体在应力下的长大合并.Co-Ni基合金的形状记忆效应来源于应力诱发ε马氏体转变,而不是热诱发ε马氏体在应力下的长大合并.低的母相屈服强度是Co-Ni合金形状记忆效应差的原因.预先形成的热诱发ε马氏体能提高母相的屈服强度,因而有利于形状记忆效应的提高.
参考文献
| [1] | H.-C. Shin;S.-H. Lee;J.-H. Jun .Martensitic transformation kinetics and shape memory effect in Co-Ni alloys[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2002(4):429-432. |
| [2] | W. M. Zhou;Y. Liu;B. H. Jiang;X. Qi;Y. N. Liu .Magnetoelastic and thermoelastic shape memory effect in a Co-Ni single crystal[J].Applied physics letters,2003(5):760-762. |
| [3] | Liu YN;Yang H;Liu Y;Jiang BH;Ding J;Woodward R .Thermally induced fcc <-> hcp martensitic transformation in Co-Ni[J].Acta materialia,2005(13):3625-3634. |
| [4] | Zhou Weimin;Liu Yan;Jiang Bohong .Shape Memory Effect in Co-Ni Polycrystalline Alloys[J].Materials Science Forum,2005(Pt.3):2029-2032. |
| [5] | Weimin Zhou;Yan Liu;Bohong Jiang .Effect of adding Si on shape memory effect in Co-Ni alloy system[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(0):468-471. |
| [6] | Y.H. Wen;H.B. Peng;P.P. Sun .A novel training-free cast Fe-18Mn-5.5Si-9.5Cr-4Ni shape memory alloy with lathy delta ferrite[J].Scripta materialia,2010(2):55-58. |
| [7] | S. Kajiwara .Characteristic features of shape memory effect and related transformation behavior in Fe-based alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(0):67-88. |
| [8] | W.B. Liu;Y.H. Wen;N. Li .Further improvement of shape memory effect in a pre-deformed Fe-Mn-Si-Cr-Ni-Nb-C alloy by smaller NbC precipitated through electropulsing treatment[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):591-594. |
| [9] | Xiaohua Min;Takahiro Sawaguchi;Xin Zhang .Reasons for incomplete shape recovery in poly crystalline Fe-Mn-Si shape memory alloys[J].Scripta materialia,2012(1):37-40. |
| [10] | Y.Tomota;Y.Morioka;W.Nakagawara .Epsilon martensite to austenite reversion and related phenomena IN Fe-24Mn and Fe-24Mn-6Si alloys[J].Acta materialia,1998(4):1419-1426. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%