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

Abstract

The tuning of Heusler alloys with respect to the stoichiometry and their effect on martensitic transformation have 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 Ni 50-x Fe x Mn 30 Sn 20-y In y alloys were investigated where Fe was varied from x= 1, 2, 3 and 4 to find its significance. An increase of Fe concentration to Fe 4 leads to a considerable improvement in the alloy's mechanical properties and crystal structure. Compressive strength of the alloy rose by 123% for Fe 4 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 36.8 to 19.83 °C range of refrigerator applications.

Oxidation-Resistant Metallic Bismuth Nanoparticles for Electrically Conductive Adhesives

“…Over the past two decades, the remarkable progress and vast potential of metal nanoparticles and metal oxide nanoparticles have become increasingly evident as they assume pivotal roles in a wide array of applications. − These nanoparticles have emerged as indispensable components for various purposes, such as imaging, sensing, and the creation of stretchable electrodes, further highlighting their significance in advancing biomedical and flexible electronics domains. − Metallic bismuth (Bi) nanoparticles have attracted much attention over the past few years due to their attractive properties. Bi nanoparticles, non-toxic and cheap diamagnetic heavy metal nanomaterials, can be widely used in near-infrared absorption, X-ray attenuation, and photothermal conversion due to their adjustable band gap, unique structure, and high-performance physical and chemical properties. − …”