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- W3149723878 abstract "Cr-Mn-N austenitic heat resistant steels have bright future in wide applications due to their lower cost,excellent mechanical properties,and outstanding local corrosion resistance after substituting the nickel partly or completely by the Mn,N and C elements.As the content of C or N elements increasing in Cr-Mn-N steels,a large quantity of precipitates form during hot working,resulting in embrittlement of these steels.In the present study,a new Cr-Mn-N austenitic heat resistant steel was aged at temperatures from 600℃ to 1000℃ in duration from 10 min up to 6000 min.By OM,SEM and XRD,the microstructure evolution of precipitates and their effects on ductility and toughness of the studied steel were investigated.The results indicated that precipitates formed during aging were mainly Cr-rich M23C6 carbides,whose morphologies changed in a sequence of intergranular films,lamellae in cellular microstructure and intragranular rods or particles with the increase of aging time and/or temperature.The time-temperature-precipitation(TTP) curves for M23C6 carbides were determined,which have a typical C-shaped profile with a nose temperature between 850℃ and 900℃,and an incubation period not more than 1 min.In addition,it was found out that the aging embrittlement of the studied steel is strongly dependent on the morphology of M23C6 carbides.The intergranular film-shaped M23C6 carbides were considered as the main factor to favor cracks rapidly expanding along grain boundaries,finally resulting in brittle intergranular fracture." @default.
- W3149723878 created "2021-04-13" @default.
- W3149723878 creator A5026125294 @default.
- W3149723878 date "2013-01-01" @default.
- W3149723878 modified "2023-09-23" @default.
- W3149723878 title "PRECIPITATION BEHAVIOR OF M_(23)C_6 AND ITS EFFECTS ON DUCTILITY AND TOUGHNESS OF A NOVEL Cr-Mn-N AUSTENITIC HEAT RESISTANT STEEL" @default.
- W3149723878 hasPublicationYear "2013" @default.
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