Abstract
Fe72−x Al28Cr x (x = 0,2,4,6) are made by arc melting a mixture of constituent elements in stoichiometric proportion, in argon atmosphere. The ingots so obtained are filed to make powder samples thereby giving them substantial mechanical deformation. It is observed that as-powdered samples show hyperfine field distribution typical of α-phase, where the atoms are randomly distributed on the available sites. Annealing at 900°C for 60 h leads to preferential occupation of lattice sites by the atoms and this results in better defined groups of hyperfine magnetic field (HMF) which can be associated with specific configuration in the neighbourhood of probe iron atoms. The average HMF is found to decrease sharply with increasing Cr concentration even though the net chromium concentration remains low (≤6 at%). The results show that cold working on samples is very important in changing the atomic ordering and must be taken into account if properties of equilibrium phases are probed.
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References
J C Wang, D J Liu, M X Chen and X X Cai,Scr. Metall. 25, 2581 (1991)
O Schneeweiss, T Žák and Y Jirásková,J. Magn. Magn. Mater. 103, 250 (1992)
Y Jirásková, M Kočová, N Pizurová, T Žák and O Schneeweiss,Mater. Sci. Tech. 9, 397 (1993)
Y Jirásková, O Schneeweiss and A Baranowski,Key Eng. Mater. 81–83, 203 (1993)
Y Jirásková, O Schneeweiss and M Šob,Mater. Sci. Forum 175–178, 399 (1995)
C T Liu,Mater. Chem. Phys. 42, 77 (1995)
Y Jirásková, O Schneeweiss, M Šob and I Novotny,Acta Mater. 45(5), 2147 (1997)
M Vondráček, O Schneeweiss and T Žák,Sensors Actuat. A59, 269 (1997)
M G Mendiratta, S K Ehlers and H A Lipsitt,Metall. Trans. 18A, 509 (1987)
R T Fortnum and D E Mikkola,Mater. Sci. Eng. 91, 223 (1987)
Brajesh Pandey, Satyam Suwas and H C Verma,J. Magn. Magn. Mater. 246, 151 (2002)
Brajesh Pandey, P M G Nambissan, Satyam Suwas and H C Verma,J. Magn. Magn. Mater. 263, 307 (2003)
K Vedula,Intermetallic compounds edited by J H Westbrook and R L Fleischer (John Wiley & Sons Ltd., 1994) vol. 2, p. 199
H C Verma and Satyam Suwas,J. Magn. Magn. Mater. 212, 361 (2000)
B Window,J. Phys E. Sci. Instrum. 4, 401 (1971)
T B Massalski (Ed.),Binary alloy phase diagrams (American Society for Metals, Metals Park, OH, 1986) vol. 1, p. 112
D Satula, L Dobrzynski, A Malinowski, K Szymañski and J Waliszewski,J. Magn. Magn. Mater. 151, 211 (1995)
S M Dubiel and J Zukrowski,J. Magn. Magn. Mater. 23, 214 (1981)
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Pandey, B., Verma, H.C. Phase changes in Fe72−x Al28Cr x (x = 0,2,4,6) alloys due to mechanical strain. Pramana - J Phys 64, 281–290 (2005). https://doi.org/10.1007/BF02704881
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DOI: https://doi.org/10.1007/BF02704881