Microstructure and Mechanical Properties of Annealed Quinary Ni-Mn-Sn-Fe-In Heusler Alloy

Abstract

The tuning of Heusler alloys with respect to stoichiometry and their effect on martensitic transformation has been investigated very little by various researchers.Thus, the effect of change in ferrous (Fe) concentration of the alloys and its effect on mechanical and magnetocaloric properties of Ni50-xFexMn30Sn20-yIny alloys were investigated where Fe was varied from x = 1, 2, 3, and 4 to find its significance.An increase in Fe concentration to Fe4 leads to a considerable improvement in the alloy's mechanical properties and crystal structure.The compressive strength of the alloy rose by 123% for Fe4 substitution.When comparing the identical materials with and without Fe addition, the ultimate stress (US) and ductility are improved by 124 and 200%, respectively, while toughness rises by 48 times.The Fe concentration variation also enabled a martensitic transformation in the 36.8 to 19.83 °C range of refrigerator applications.