Mobility of dislocations and grain boundaries controlled by the order degree in iron-based alloys

7th Meeting of the Spanish Neutron Scattering Association

Gargicevich, D.^1 ; Lambri, O.A.^1 ; Pérez-Landazábal, J.I.^2,3 ; Recarte, V.^2,3 ; Bonifacich, F.G.^1 ; Cuello, G.J.^4 ; Sánchez Alarcos, V.^2

Laboratorio de Materiales, Escuela de Ingeniería Eléctrica, Universidad Nacional de Rosario - CONICET, Av. Pellegrini 250, Rosario

2000, Argentina^1

Departamento de Física, Institute for Advanced Materials (INAMAT), Universidad Pública de Navarra, Campus de Arrosadía s/n, Pamplona

31006, Spain^2

Institute for Advanced Materials (INAMAT), Universidad Pública de Navarra, Campus de Arrosadía, Pamplona

31006, Spain^3

Institute Laue-Langevin, 71 Av. des Martyrs, Grenoble Cedex 9

38042, France^4

关键词: Amplitude Dependent Damping;    Fe-Si alloys;    Iron-based alloy;    Mechanical spectroscopy;    Mobility of dislocations;    Ordered alloys;    Ordering degree;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/663/1/012013/pdf
DOI  :  10.1088/1742-6596/663/1/012013

来源: IOP

【 摘 要 】

Neutron diffraction and mechanical spectroscopy studies were performed in Fe-Al-Cr, Fe-Al-Si and Fe-Si alloys. Results show that in ordered alloys independently of the type of order, D03or B2, the mobility of dislocations and grain boundaries is markedly reduced. It is revealed through small values both of damping and of the strength of the amplitude dependent damping (S). Moreover, the behaviour of S as a function of temperature is a suitable tool for determining the order changes as a function of temperature.