期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2020.140543
关键词
Shape memory alloys; Two-way shape memory effect; Mechanical training; NiFeGaCo; Martensitic transformation
类别
资金
- Spanish Ministerio de Ciencia, Innovacion y Universidades - Agencia Estatal de Investigacion (MCIUAEI)
- Fondo Europeo de Desarrollo Regional (FEDER), UE [RTI 2018-094683-B-C51]
- Tomsk State University competitiveness improvement program
The present study investigated the two-way shape memory effect induced in Ni49Fe18Ga27Co6 (at%) ferromagnetic shape memory single crystals. It was found that a short superelastic cycling in compression along the [001] direction at increasing temperatures up to 453 K is enough to induce fully reversible TWSME. Trained samples showed a very good correlation between martensite reorientation tests and thermal transformation under antagonistic stress.
The two-way shape memory effect (TWSME) induced in Ni49Fe18Ga27Co6 (at%) ferromagnetic shape memory single crystals is investigated in the present work. A short superelastic cycling in compression along the [001] direction at increasing temperatures up to 453 K, with a total of 18 cycles is enough to induce fully reversible TWSME with spontaneous strain up to 5.4% and maximum work output of 27 J.kg(-1) performed upon cooling through the martensitic transformation under antagonistic tensile stress. A very good correlation between martensite reorientation tests and thermal transformation under antagonistic stress has been obtained for TWSME trained samples.
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