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Titolo:
Precipitation behavior on carbon steel modified by double glow plasma surface alloying with W and Mo
Autore:
Zhao, B; Wu, JS; Xu, Z; Li, ZH; Liu, XP;
Indirizzi:
Shanghai Jiao Tong Univ, Minist Educ High Temp Mat & Tests, Sch Mat Sci & Engn, Key Lab, Shanghai 200030, Peoples R China Shanghai Jiao Tong Univ Shanghai Peoples R China 200030 Peoples R China Taiyuan Univ Technol, Res Inst Surface Engn, Taiyuan 030024, Peoples R China Taiyuan Univ Technol Taiyuan Peoples R China 030024 024, Peoples R China
Titolo Testata:
MATERIALS TRANSACTIONS
fascicolo: 9, volume: 42, anno: 2001,
pagine: 1994 - 1997
SICI:
1345-9678(200109)42:9<1994:PBOCSM>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Keywords:
thermodynamics; phase transformation; precipitates; isothermal transformation diagram;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Zhao, B Shanghai Jiao Tong Univ, Minist Educ High Temp Mat & Tests, Sch Mat Sci & Engn, Key Lab, Shanghai 200030, Peoples R China Shanghai Jiao Tong Univ Shanghai Peoples R China 200030 R China
Citazione:
B. Zhao et al., "Precipitation behavior on carbon steel modified by double glow plasma surface alloying with W and Mo", MATER TRANS, 42(9), 2001, pp. 1994-1997

Abstract

Many brittle precipitates appeared in the alloyed layers which were formedin surface modified carbon steel by DGPSA (Double Glow Plasma Surface Alloying) with W and Mo because of the slow cooling rate in the alloying furnace. As a result the mechanical properties of these alloys were significantlydegraded by precipitation of the brittle phase. Phase analysis of the electro-extracted precipitates by X-ray diffraction (XRD) revealed that they were mainly composed of the p-phase and a small amount of carbide, M6C. In the present study, their microstructures were characterized by optical microscopy (OM) and scanning electron microscopy (SEM). It was concluded that thechemical components, temperature and time were the main thermodynamic factors influencing their deposition. The isothermal transformation (IT) diagram of the precipitates showed that there were two transforming climaxes. Based on the IT diagram, a technique was developed to depress die precipitate deposition.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 14:34:59