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Titolo:
REHEAT CRACKING STUDIES ON SIMULATED HEAT-AFFECTED ZONES OF CRMOV TURBINE ROTOR STEELS
Autore:
INDACOCHEA JE; KIM GS;
Indirizzi:
UNIV ILLINOIS CHICAGO IL 60680 SOON CHUN HYANG UNIV CHUNGNAM SOUTH AFRICA
Titolo Testata:
Journal of materials engineering and performance
fascicolo: 3, volume: 5, anno: 1996,
pagine: 353 - 364
SICI:
1059-9495(1996)5:3<353:RCSOSH>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
METALLURGICAL ASPECTS;
Keywords:
CARBIDE PRECIPITATION; CRMOV STEELS; GLEEBLE; HP/IP TURBINE ROTOR; REHEAT CRACKING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
J.E. Indacochea e G.S. Kim, "REHEAT CRACKING STUDIES ON SIMULATED HEAT-AFFECTED ZONES OF CRMOV TURBINE ROTOR STEELS", Journal of materials engineering and performance, 5(3), 1996, pp. 353-364

Abstract

The reheat cracking susceptibility of the heat-affected zone (HAZ) ofa CrMoV turbine rotor steel was investigated. Two base materials, onewith a coarse-grain (155 mu m) and the other with a fine-grain (55 mum) microstructure, were submitted to Gleeble HAZ weld simulations. Three peak temperatures were utilized: 1350, 1150, and 950 degrees C. Some samples were single cycled, and others were exposed to a double cycle. The samples that were double cycled experienced a second peak temperature 150 to 250 degrees C lower than the first peak temperature. The samples were then stressed in bending for different amounts and stress relieved under load to determine their reheat cracking susceptibility. All samples were metallurgically evaluated before and after the reheat cracking test. It was found that the prior-austenite grain size of the original base metal did not influence the reheat cracking susceptibility, but increases in peak temperature did. It was observed that the grain size and grain matrix microhardness that developed after theGleeble cycles affected reheat cracking. It was found that reheat cracking did not occur when the microhardness was below 350 DPH and the prior-austenite grain size was less than about 80 mu m.

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Documento generato il 14/07/20 alle ore 11:14:01