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Titolo:
THEORY FOR REAUSTENITIZATION FROM FERRITE CEMENTITE MIXTURES IN FE-C-X STEELS/
Autore:
ATKINSON C; AKBAY T; REED RC;
Indirizzi:
UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT MATH,180 QUEENS GATELONDON SW7 2RH ENGLAND UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT MAT LONDON SW7 2BP ENGLAND UNIV CAMBRIDGE,DEPT MAT SCI & MET CAMBRIDGE CB2 3QZ ENGLAND
Titolo Testata:
Acta metallurgica et materialia
fascicolo: 5, volume: 43, anno: 1995,
pagine: 2013 - 2031
SICI:
0956-7151(1995)43:5<2013:TFRFFC>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONTROLLED PRECIPITATE GROWTH; REGULAR SOLUTION MODEL; LOW-CARBON STEEL; THERMODYNAMIC EVALUATION; CEMENTITE DISSOLUTION; COMPUTER-SIMULATIONS; ALLOYING ELEMENTS; TERNARY-SYSTEMS; AUSTENITE; KINETICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
57
Recensione:
Indirizzi per estratti:
Citazione:
C. Atkinson et al., "THEORY FOR REAUSTENITIZATION FROM FERRITE CEMENTITE MIXTURES IN FE-C-X STEELS/", Acta metallurgica et materialia, 43(5), 1995, pp. 2013-2031

Abstract

Phase transformation theory for the formation of austenite from substitutionally alloyed ferrite/cementite mixtures is discussed. The localequilibrium assumption is adopted. Diffusion of carbon in ferrite andcementite is ignored, together with the ternary diffusional interactions. The ferrite and cementite phases are assumed to be semi-infinite in extent, so that soft impingement effects are not accounted for. Subject to these assumptions, exact solutions are presented for one-dimensional (planar) growth. The solution method involves the determinationof the appropriate tie-lines at the cementite/austenite and austenite/ferrite interfaces. Potential numerical difficulties which arise in determining the solution are discussed. It is found that for reasonablevalues of the diffusion coefficients involved, the governing equations can be simplified. The results are presented in the form of reverse time-temperature-transformation diagrams, and comparisons with recent results for reaustenitisation from binary Fe-C steels are made. The effects of silicon and manganese as ternary alloying additions are quantified.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 10:57:20