Effect of Fe doping and magnetic field on martensitic transformation of Mn-Ni(Fe)-Sn metamagnetic shape memory alloys. (15th August 2018)

• Record Type: Journal Article
• Authors: Lázpita, P.; Sasmaz, M.; Barandiarán, J.M.; Chernenko, V.A.
• Is Part Of: Acta materialia. Volume 155(2018)
• Page Start: 95
• Page End: 103
• Publication Date: 2018-08-15
• Subjects: Magnetic shape memory alloy -- Martensitic phase transformation -- Magnetic properties -- Magnetostrain -- Metamagnetic effect; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2018.05.052
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: In this work we report the elaboration of a family of metamagnetic shape memory alloys with composition Mn49 Ni42-x Fex Sn9 (x = 0, 2, 3, 4, 5 and 6 at.%) and the systematic study of their structure, martensitic transformation (MT) behavior and functional characteristics as a function of the Fe doping and magnetic field, up to 12 T. Regarding the influence of the magnetic field, we have tentatively divided the alloys into two groups: group I, alloys with x = 0, 2, 3 and 4 and group II, alloys with x = 5 and 6. Group II alloys exhibit an appreciable amount of dispersed γ-phase and a field-induced arrest of MT. The alloys from group I show a large magnetization drop at MT that proceeds steeply. This group also displays a monotonous evolution of all studied properties with pronounced metamagnetic effect and large magnetostrain effect, reaching 0.3%, in the alloy with x = 4. Graphical abstract: Image 1