Microstructure and phase transformations in a Ni50Mn29Ga16Gd5 alloy with a high transformation temperature
Source abstract
Abstract
A Heusler Ni50Mn29Ga16Gd5 alloy with a high transformation temperature has been obtained by substituting 5 at% Gd for Ga in a ternary Ni50Mn29Ga21 ferromagnetic shape memory alloy. The microstructure and phase transformations in the Ni50Mn29Ga16Gd5 alloy have been investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and differential scanning calorimetry. It is shown that the microstructure of the Ni50Mn29Ga16Gd5 alloy consists of matrix and hexagonal Gd (Ni,Mn)4Ga phase, which indicates a eutectic structure composed of these two phases. One-step thermoelastic martensitic transformation occurs in this quaternary alloy. Ni50Mn29Ga16Gd5 alloy exhibits a martensite transformation start temperature up to 524 K, approximately 200 K higher than that of Ni50Mn29Ga21 alloy. At room temperature, non-modulated martensite with twin substructure is observed in Ni50Mn29Ga16Gd5 alloy.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Shape Memory Alloy Transformations · Creativity in Education and Neuroscience
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (13)
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1. Sozinov A, Likhachev AA, Lanska N, Ullakko K (2002) Appl Phys Lett 80:174610.1063/1.1458075 ↗
2. Ullakko K, Huang JK, Kantner C, O’handley RC, Kokorin VV (1996) Appl Phys Lett 69:196610.1063/1.117637 ↗
3. Jiang CB, Liang T, Xiu HB, Zhang M, Wu GH (2002) Appl Phys Lett 81:281810.1063/1.1512948 ↗
4. Söderberg O, Ge Y, Sozinov A, Hannula SP, Lindroos VK (2005) Smart Mater Struct 14:S22310.1088/0964-1726/14/5/009 ↗
5. Tsuchiya K, Tsutsumi A, Ohtsuka H, Umemoto M (2004) Mater Sci Eng A 378:37010.1016/j.msea.2003.11.076 ↗
6. Zhao ZQ, Xiong W, Wu SX, Wang XL (2004) J Iron Steel Res 111:55
7. Guo SH, Zhang YH, Zhao ZQ, Li JL, Wang XL (2004) J Rare Earths 22:632
8. Gao L, Cai W, Liu AL, Zhao LC (2006) J Alloys Compd 425:31410.1016/j.jallcom.2006.01.037 ↗
9. Joshi DA, Tomy CV, Rana DS, Nagarajan R, Malik SK (2006) Solid State Commun 137:22510.1016/j.ssc.2005.11.005 ↗
10. Albertini F, Pareti L, Paoluzia A, Morellon L, Algarabel PA, Ibarra MR, Righi L (2002) Appl Phys Lett 81:403210.1063/1.1525071 ↗
11. Jiang CB, Muhammad Y, Deng LF, Wu W, Xu HB (2004) Acta Mater 52:277910.1016/j.actamat.2004.02.024 ↗
12. Wang WH, Chen JL, Liu ZH, Wu GH, Zhan WS (2001) Phys Rev B 65:01241610.1103/PhysRevB.65.012416 ↗
13. Pons J, Chernenko VA, Santamarta R, Cesari E (2000) Acta Mater 48:302710.1016/S1359-6454(00)00130-0 ↗