COMPOSITION TRIANGLE DIAGRAMS OF Ni-Mn-Ga MAGNETIC SHAPE MEMORY ALLOYS
来源期刊：Acta Metallurgica Sinica2006年第3期
论文作者：H.B. Xu J.M. Wang Y.F. Wang C.B. Jiang
Key words：Ni2MnGa alloy; martensitic transformation; magnetic shape memory alloy;
Abstract: A statistical work has been done to collect the composition ranges of Ni-Mn-Ga alloys exhibiting different structures and martensite start temperature (Ms), large magnetostrain or the co-existence of magnetic and structural transitions. The alloys with five-layered ( 5M), seven-layered(7M) modulated and non-modulated (T) martensitic structures were mapped in the graph. An empirical formula has been presented to reflect the effect of elements nickel (Ni), manganese (Mn)and gallium (Ga), on the martensite start temperature (Ms). The martensitic structure is sensitive to the composition and the martensitic transformation temperature is most drastically affected by the Ni content. The alloys with large magnetostrain or co-existence effect of the magnetic and structural transitions were also listed in a limited area.
H.B. Xu1，J.M. Wang1，Y.F. Wang1，C.B. Jiang1
(1.School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)
Abstract:A statistical work has been done to collect the composition ranges of Ni-Mn-Ga alloys exhibiting different structures and martensite start temperature (Ms), large magnetostrain or the co-existence of magnetic and structural transitions. The alloys with five-layered ( 5M), seven-layered(7M) modulated and non-modulated (T) martensitic structures were mapped in the graph. An empirical formula has been presented to reflect the effect of elements nickel (Ni), manganese (Mn)and gallium (Ga), on the martensite start temperature (Ms). The martensitic structure is sensitive to the composition and the martensitic transformation temperature is most drastically affected by the Ni content. The alloys with large magnetostrain or co-existence effect of the magnetic and structural transitions were also listed in a limited area.
Key words:Ni2MnGa alloy; martensitic transformation; magnetic shape memory alloy;
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