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| Effect of Plastic Deformation on Magnetic Properties of Fe��40%Ni��2%Mn Austenitic Alloy |
| Selva B��y��kakka?���D1,H Aktas2,S Akturk2 |
| 1. Physics Department, Nigde University, Nigde 51100, Nigde, Turkey;2. Physics Department, Kirikkale University, Yahsihan 71450, Kirikkale, Turkey |
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Abstract The effects of plastic deformation on the magnetic properties of austenite structure in an Fe��40%Ni��2%Mn alloy is investigated by using M��ssbauer spectroscopy and Differential Scanning Calorimetry (DSC) techniques The morphology of the alloy has been obtained by using Scanning Electron Microscopy (SEM). The magnetic behaviour of austenite state is ferromagnetic. After plastic deformation, a mixed magnetic structure including both paramagnetic and ferromagnetic states has been obtained at the room temperature. The volume fraction changes, the effective hyperfine fields of the ferromagnetic austenite phase and isomery shift values have also been determined by M��ssbauer spectroscopy. The Curie point (TC) and the Neel temperature (TN) have been investigated by means of DSC system for non��deformed and deformed Fe��Ni��Mn alloy. The plastic deformation of the alloy reduces the TN and enhances the paramagnetic character of austenitic Fe��Ni��Mn alloy.
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Received: 01 January 1900
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2007, Vol. 14 
