Entropy change and effect of magnetic field on martensitic transformation in a metamagnetic Ni–Co–Mn–In shape memory alloy

2009 ◽  
Vol 94 (19) ◽  
pp. 191901 ◽  
Author(s):  
S. Kustov ◽  
M. L. Corró ◽  
J. Pons ◽  
E. Cesari
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Entropy Change

Effect of Constant-Strain Aging on Microstructure, Martensitic Transformation and Magnetic Property of Ni53Mn23.5Ga23.5 Ferromagnetic Shape Memory Alloy

2014 ◽  
Vol 1015 ◽  
pp. 114-118
Author(s):  
G.F. Dong
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Curie Temperature ◽  
Shape Memory ◽  
Aged Sample ◽  
Ferromagnetic Shape Memory Alloy ◽  
Solution Treated ◽  
Treated Sample ◽  
Ferromagnetic Shape Memory

The effect of constant-strain aged and unaged on microstructure, martensite transformation, Curie temperature and magnetic field induction strain of Ni53Mn23.5Ga23.5ferromagnetic shape memory alloy was investigated in detail. The results show that reverse martensitic transformation temperatures of constant-strain aged sample slowly decrease, which martensitic transformation temperatures almost unchanged. In addition, Curie temperature of constant-strain aged sample is almost maintains consistent with solution-treated sample, but slowly increases saturation magnetization of constant-strain aged sample than solution-treated sample. Finally, the sample of constant-strain aged sample showed a larger magnetic field induction strain of 402 ppm.

Magnetic field induced martensitic transformation linked to the arrested austenite in a Ni-Mn-In-Co shape memory alloy

2011 ◽  
Vol 109 (9) ◽  
pp. 093515 ◽  
Author(s):  
J. I. Pérez-Landazábal ◽  
V. Recarte ◽  
V. Sánchez-Alarcos ◽  
C. Gómez-Polo ◽  
S. Kustov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory

Martensitic Transformation and Magnetic-Field-Induced Strain in Magnetic Shape Memory Alloy NiMnGa Melt-Spun Ribbon

2005 ◽  
Vol 475-479 ◽  
pp. 2009-2012 ◽  
Author(s):  
Shi Hai Guo ◽  
Yang Huan Zhang ◽  
Bai Yun Quan ◽  
Jian Liang Li ◽  
Xin Lin Wang
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Internal Stress ◽  
Melt Spinning ◽  
Martensitic Transformation Temperature ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloy ◽  
Melt Spun

A non-stoichiometric polycrystalline Ni50Mn27Ga23 magnetic shape memory alloy was prepared by melt-spinning technology. The effects of melt-spinning on the martensitic transformation and magnetic-field-induced strain (MFIS) of the melt-spun ribbon were investigated. The experimental results show that the melt-spun ribbon undergoes the thermal-elastic martensitic transformation and exhibits the thermo-elastic shape memory effect. But the martensitic transformation temperature decreases and Curie temperature remains unchanged. A particular internal stress induced by melt-spinning made a texture structure in the melt-spun ribbon, which made the melt-spun ribbon obtain larger transition-induced strain and MFIS. The internal stress was released under cycling of magnetic field. This resulted in a decrease of MFIS of the melt-spun ribbon.

scholarly journals Long-Range Atomic Order and Entropy Change at the Martensitic Transformation in a Ni-Mn-In-Co Metamagnetic Shape Memory Alloy

Entropy ◽  
2014 ◽  
Vol 16 (5) ◽  
pp. 2756-2767 ◽  
Author(s):  
Vicente Sánchez-Alarcos ◽  
Vicente Recarte ◽  
José Pérez-Landazábal ◽  
Eduard Cesari ◽  
José Rodríguez-Velamazán
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Long Range ◽  
Entropy Change ◽  
Atomic Order ◽  
Range Atomic Order

Martensitic transformation and magnetic field induced effects in Ni42Co8Mn39Sn11 metamagnetic shape memory alloy

2016 ◽  
Vol 109 ◽  
pp. 170-176 ◽  
Author(s):  
P. Lázpita ◽  
M. Sasmaz ◽  
E. Cesari ◽  
J.M. Barandiarán ◽  
J. Gutiérrez ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory

Martensitic transformation and magnetic field-induced strain in Fe–Mn–Ga shape memory alloy

2009 ◽  
Vol 95 (8) ◽  
pp. 082508 ◽  
Author(s):  
T. Omori ◽  
K. Watanabe ◽  
R. Y. Umetsu ◽  
R. Kainuma ◽  
K. Ishida
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory

Magnetic Field and Annealing Influence on the Martensitic Transition in Ni45.8Mn42.6In11.6 Shape Memory Alloy Ribbons

2012 ◽  
Vol 190 ◽  
pp. 307-310 ◽  
Author(s):  
Lorena González ◽  
J. García ◽  
M. Nazmunnahar ◽  
W.O. Rosa ◽  
L. Escoda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformation ◽  
Low Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
High Magnetic Field ◽  
Heusler Alloy ◽  
Vacuum Annealing ◽  
Martensitic Transition ◽  
Two Peaks

We report the effect of shorttime vacuum annealing, during 10 minutes at 923 K, 973 K, 1023 K and 1073 K, on magnetostructural properties of as-quenched ribbons of Ni45.5Mn43In11.5 Heusler alloy. The martensitic transformation is strongly sensitive to annealing treatments. The martensitic phase starting temperature is significantly shifted from 239 K towards higher temperatures around 370 K. It suffers a break down in two peaks when a field equal or higher than 500 Oe is applied to the as-quenched sample. This effect is not detected in the transformation of annealed ribbons but its signature can be observed at low temperature. Moreover, under high magnetic field up to 30 kOe temperatures associated with both martensitic and reverse transitions do not change for annealed samples, meanwhile the magnetization difference between austenite and martensite increases with the field. Nevertheless, it almost remains unchanged in the as-quenched ribbon.

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