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Titolo:
TERNARY SITE PREFERENCE ENERGIES, SIZE MISFITS AND SOLID-SOLUTION HARDENING IN NIAL AND FEAL
Autore:
MEDVEDEVA NI; GORNOSTYREV YN; NOVIKOV DL; MRYASOV ON; FREEMAN AJ;
Indirizzi:
NORTHWESTERN UNIV,DEPT PHYS & ASTRON,2145 SHERIDAN RD EVANSTON IL 60208 INST SOLID STATE CHEM EKATERINBURG RUSSIA INST PHYS MET EKATERINBURG RUSSIA
Titolo Testata:
Acta materialia
fascicolo: 10, volume: 46, anno: 1998,
pagine: 3433 - 3442
SICI:
1359-6454(1998)46:10<3433:TSPESM>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSITION-METAL ALUMINIDES; ELECTRONIC-STRUCTURE; DISLOCATION INTERACTION; COHESIVE PROPERTIES; MAGNETIC-PROPERTIES; NICKEL; IRON; OCCUPATION; ADDITIONS; STABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
N.I. Medvedeva et al., "TERNARY SITE PREFERENCE ENERGIES, SIZE MISFITS AND SOLID-SOLUTION HARDENING IN NIAL AND FEAL", Acta materialia, 46(10), 1998, pp. 3433-3442

Abstract

The electronic structure of NiAl and FeAl doped with Ti, V, Cr, Mn, Fe, Co, Y, La and Zr additions in both sublattices has been investigated with the local density linear muffin-tin orbital (LMTO) method. The peculiarities of chemical bonding for both undoped and with some ternary additions in NiAl and FeAl were analyzed using the LMTO-Green function method. The preferred sites for ternary additions were found and the sensitivity of site preference energies to crystal relaxation effects was investigated. It was shown that the relaxation has an elastic nature and the values of size misfit parameters for substitutional impurities were estimated. The experimental data concerning solid solutionhardening were reanalyzed and the additional contributions to hardening besides the conventional size misfit mechanism were shown to be of importance for Ti ternary additions. (C) 1998 Acta Metallurgica Inc.

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Documento generato il 25/11/20 alle ore 06:58:10