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HomeKey Engineering MaterialsKey Engineering Materials Vol. 835Hydrostatic Training and Characterization of near...

Hydrostatic Training and Characterization of near Stoichiometric Ni-Mn-Ga Alloy

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Abstract:

Shape memory alloys are programmed to memorize original trained shape. Ni-Mn-Ga is one of the ferromagnetic shape memory alloys. It is used as actuator, and sensor due to large output strain at high frequencies. This work presents a study on enhancing magnetic properties of thermally treated alloy by using new method of training in which alloys are exposed to different hydrostatic pressures using pressing die. Single near stoichiometric composition was produced. Elemental analysis showed homogeneity of the alloy. XRD pattern revealed Martensitic phase peaks. Transformation temperature was found to be below 100 OC. Training was applied by hydrostatic pressing die. Different training pressures were obtained using hydraulic press. After applying hydrostatic pressures starting from 2.5 bar to 10 bar, it was found that pressures up to 7.5 bar will increase the coercivity and saturation magnetization of the alloy, while pressures beyond 7.5 bar lessened these magnetic properties.

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Recent Advances in Materials Science and Engineering II

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Periodical:

Key Engineering Materials (Volume 835)

Pages:

22-27

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.835.22

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Online since:

March 2020

Authors:

Nour Mahmoud Eldabah*, Saleh Kaytbay, Mohammed A. Gepreel, Ahmed Mohamed El-Assal

Keywords:

Hydrostatic Training, Magnetic Properties, Magnetic Shape Memory Alloys, Martensite Twins, Ni-Mn-Ga Alloy

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* - Corresponding Author

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