The effect of Sn content on mechanical, magnetization and shape memory behavior in NiMnSn alloys

Abstract

The effects of the composition alteration on the magnetization and shape memory behavior of Ni50Mn40-xSn10+x (x=0, 1, 2, 3) alloys were systematically investigated by thermal, magnetic and mechanical experiments. Phase transformation from ferromagnetic austenite to weakly magnetic martensite was observed during thermal cycling under magnetic field and transformation temperatures were decreased with increasing Sn (or decreasing Mn). Moreover, the saturation magnetization of martensite increased with Sn content. Ni50Mn40Sn10 showed the recoverable strain of 2.1 % during thermal cycling under 300 MPa and the reversible superelastic strain of 2 % at 190 °C. Mechanical experiments exhibited that the largest compressive deformation of about 7 % at 650 MPa occurred in Ni50Mn39Sn11 while Ni50Mn40Sn10 had fractured at 4 % and 390 MPa at room temperature.

Ni50Mn36Sn14 Heusler Alaşımının Yumuşak Manyetik Karakteri

“…It was clearly seen that NiMnSn-HA and its components have the hysteresis loops with hard ferromagnetic characteristic, which is related to high coercivity. These results, except for those of its Mn2 components, are a quantitatively good accordance with the theoretical report of Ni50Mn36Sn14 Heusler alloy by Duran [35] and with the experimental reports of Ni50Mn36Sn14 alloy by Li et al [66], Mn2Ni1.6Sn0.4 melt-spun ribbons by Singh et al [67], Ni50Mn36Sn14-xSix alloys by Raji et al [29], Ni50Mn40-xSn10+x alloys by Aydogdu et al [18]. In Fig.…”

“…In that case, it can be suggested that its Mn2 component displays a weak first order phase transition at a temperature value between 1.00 to 1.25 according to the hysteresis behaviors. These ferromagnetic hysteresis behaviors are in a good accordance with the theoretical report of Ni50Mn36Sn14 Heusler alloy by Duran [35] and with the experimental reports of Ni50Mn36Sn14 alloy by Li et al [66], Mn2Ni1.6Sn0.4 melt-spun ribbons by Singh et al [67], Ni50Mn36Sn14-xSix alloys by Raji et al [29], Ni50Mn40-xSn10+x alloys by Aydogdu et al [18]. The HC values of the HA and its components are zero and the hysteresis loops of NiMnSn-HA and its components lose at T>TC as it is seen in Fig.…”

“…The effects of boron addition on the microstructure, magnetic, mechanical, and shape memory properties of Ni50Mn40−xSn10Bx polycrystalline alloys were examined [17]. The effects of the composition alteration on the magnetization and shape memory behavior of Ni50Mn40-xSn10+x alloys were reported [18]. The microstructural and phase transition characteristics of melt spun ribbons of Heusler alloys with starting selected compositions Ni50Mn37Sn13, Ni50Mn36Sn14, and Ni50Mn40Sn10 were given in the literature [19].…”

Structural Transformation and Hysteresis Behaviour of Ni46Cu4Mn45Sn5 Alloy Synthesized by Ball Milling Method

“…Sample obtained after ice water quenching was prepared for microstructural study after mechanical grinding with abrasive papers of different grades followed by polishing on velvet cloth with diamond paste. In order to reveal the microstructure of the alloy, polished sample was etched with a solution of 10 ml HCl, 2.5gm FeCl 3 ‐H 2 O and 48 ml methanol . Microstructural analysis of the sample was performed using Optical Microscope (Zeiss AX10) and Scanning Electron Microscope (SEM: Nova Nano FE‐SEM 450 (FEI); chemical composition was determined by Energy Dispersive X‐ray Spectroscopy (EDS: Oxford Instruments).…”

All-d-Metal Full Heusler Alloys: A Novel Class of Functional Materials

“…The discovery of Heusler alloys traces back to 1903, when Fritz Heusler observed ferromagnetic behavior on Cu 2 MnAl, an intermetallic formed entirely by nonferromagnetic elements. These are magnetic materials with important technological applications due to shape memory behavior, , magnetocaloric effect, , magnetoresistance, , half-metallicity, and thermoelectrical properties …”