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Titolo:
CALCULATION OF ALPHA GAMMA-EQUILIBRIA IN SA508 GRADE-3 STEELS FOR INTERCRITICAL HEAT-TREATMENT/
Autore:
LEE BJ; KIM HD; HONG JH;
Indirizzi:
KOREA RES INST STAND & SCI,MAT EVALUAT CTR TAEJON 305600 SOUTH KOREA KOREA ATOM ENERGY RES INST,NUCL STRUCT STEEL LAB TAEJON 305600 SOUTH KOREA KOREA ELECT POWER RES INST TAEJON 305380 SOUTH KOREA
Titolo Testata:
Metallurgical and materials transactions. A, Physical metallurgy andmaterials science
fascicolo: 5, volume: 29, anno: 1998,
pagine: 1441 - 1447
SICI:
1073-5623(1998)29:5<1441:COAGIS>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
MN-C SYSTEM; NI-N SYSTEM; REGULAR SOLUTION MODEL; THERMODYNAMIC EVALUATION; FE-CR; PHASE-DIAGRAM; MO-C; V SYSTEM; STABILITY; AUSTENITE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
86
Recensione:
Indirizzi per estratti:
Citazione:
B.J. Lee et al., "CALCULATION OF ALPHA GAMMA-EQUILIBRIA IN SA508 GRADE-3 STEELS FOR INTERCRITICAL HEAT-TREATMENT/", Metallurgical and materials transactions. A, Physical metallurgy andmaterials science, 29(5), 1998, pp. 1441-1447

Abstract

An attempt has been made to suggest an optimum temperature for intercritical heat treatment of an SA508 grade 3 steel for nuclear pressure vessels, based on thermodynamic calculation of the alpha/gamma phase equilibria. A thermodynamic database constructed for the Fe-Mn-Ni-Mo-Cr-Si-V-Al-C-N ten-component system and an empirical criterion that the amount of reformed austenite should be around 40 pct were used for thermodynamic calculation and derivation of the optimum heat-treatment temperature, respectively. The calculated optimum temperature, 720 degrees C, was in good agreement with an experimentally determined temperature of 725 degrees C obtained through an independent experimental investigation of the same steel. The agreement between the calculated and measured fraction of reformed austenite during the intercritical heat treatment was also confirmed. Based on the agreement between calculation and experiment, it could be concluded that thermodynamic calculations can be successfully applied to the materials and/or process design as an additive tool to the already established technology, and that the currently constructed thermodynamic database for steel systems showsan accuracy that makes such applications possible.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 23:52:26