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Ordering and magnetostriction in Fe alloy single crystals
Authors:S. Guruswamy  G. Garside  C. Ren  B. Saha  M. Ramanathan
Affiliation:1. Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400094, India;2. Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India;3. Atomic and Molecular Physics Division, Bhabha Atomic Research Center, Mumbai, 400085, India;4. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, 452001, India;1. Laboratory for Condensed Matter Physics, Department of Condensed Matter Physics and Materials Sciences, S.N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake, Kolkata 700 098, India;2. Department of Condensed Matter Physics and Materials Sciences, S.N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake, Kolkata 700 098, India;3. Presidency University, 86/1 College Street, Kolkata 700 073, India;4. Lady Brabourne College, P-1/2 Suhrawardy Avenue, Kolkata 700 017, India;1. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980, Dubna, Russia;2. Lomonosov Moscow State University, 119991, Moscow, Russia;3. National University of Science and Technology “MISIS”, 119049, Moscow, Russia
Abstract:Short-range and long-range ordering in α-Fe terminal solid solution phase (A2 phase with bcc structure) influences its physical, mechanical, magnetic and magnetostrictive behavior. Single crystal sample forms are ideal for examining order in these alloys using X-ray and neutron scattering techniques. Limited structural information available suggests that the lattice of A2 phase at room temperature contains a mixture of regions with local atomic environments similar to those expected in the long-range ordered structures in stable/metastable equilibrium with the A2 phase. The nature and extent of these regions are sensitive to alloy composition and the thermal history. The lattice strain modulations result from the nature of solute atom distribution (short-range ordering) in each region and impact the physical, mechanical, corrosion and magnetic behaviors. A need for a fundamental understanding of ordering in Fe and other alloys through structural evaluations of local atomic environments in alloy single crystals is suggested in this review.
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