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Effect of Fe substitution on martensitic transformation, magnetocaloric response and mechanical properties of Mn50-xFexNi35Ti15 all-d-metal Heusler alloys
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DOI：10.1016/j.intermet.2026.109447.png)
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Abstract
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• Mn50-xFexNi35Ti15 (x = 0, 5, 10, 15) all-d-metal Heusler alloys were successfully prepared via arc melting process. • XRD reveals the coexistence of cubic B2-type austenite and monoclinic 5M-type martensite phases in all studied alloys. • Fe substitution effectively tunes the martensitic transformation temperature and magnetostructural coupling behavior. • The Mn40Fe10Ni35Ti15 (x = 10) alloy shows the highest magnetocaloric response, with ΔSm ≈ 2.23 J kg−1 K−1 and RCeff ≈ 36.99 J kg−1 under μ0ΔH = 0-5 T. • The Mn35Fe15Ni35Ti15 (x = 15) alloy exhibits a remarkable strength–ductility combination, with an ultimate compressive strength of 1831 MPa and a fracture strain of 17.3%.
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