Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate rates
In this contribution some aspects of the behavior of the ASTM A335 P91 (9Cr1MoVNbN) steel subjected to continuous cooling cycles under fixed austenitization conditions are studied. Representative samples of the structures obtained after cooling at moderate rates (i.e. pure martensitic and mixed mart...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-01-01
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| Series: | Journal of Materials Research and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785418300723 |
| _version_ | 1818268951073783808 |
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| author | Denise Alejandra Carrizo Jorge Ignacio Besoky María Luppo Claudio Danon Cinthia Paula Ramos |
| author_facet | Denise Alejandra Carrizo Jorge Ignacio Besoky María Luppo Claudio Danon Cinthia Paula Ramos |
| author_sort | Denise Alejandra Carrizo |
| collection | DOAJ |
| description | In this contribution some aspects of the behavior of the ASTM A335 P91 (9Cr1MoVNbN) steel subjected to continuous cooling cycles under fixed austenitization conditions are studied. Representative samples of the structures obtained after cooling at moderate rates (i.e. pure martensitic and mixed martensitic-ferritic) were analyzed in order to incorporate information to the Continuous Cooling Transformation (CCT) diagram of this material. The characterization was carried out by means of scanning and transmission electron microscopy (TEM), X-ray diffraction and Mössbauer spectroscopy. For the working conditions here employed, the results showed the existence of retained austenite within both, the pure martensitic and the mixed martensitic-ferritic domains of cooling rates, adding important information to the CCT diagram since retained austenite presence could be detrimental to the mechanical properties of the steel. Second phase precipitates, being relevant to fix the mechanical behavior of the material, were identified by means of TEM on carbon replicas. Mössbauer spectroscopy was very helpful to detect a low volume fraction of cementite-type phase in all of the samples, considering that it could not be conclusively determined by XRD due to orientation effects. Keywords: Ferritic-martensitic steels, Scanning and transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy |
| first_indexed | 2024-12-12T20:46:38Z |
| format | Article |
| id | doaj.art-14e8c69679ec4131809c7e931fef3056 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-12T20:46:38Z |
| publishDate | 2019-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-14e8c69679ec4131809c7e931fef30562022-12-22T00:12:34ZengElsevierJournal of Materials Research and Technology2238-78542019-01-0181923934Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate ratesDenise Alejandra Carrizo0Jorge Ignacio Besoky1María Luppo2Claudio Danon3Cinthia Paula Ramos4Gerencia Materiales, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, ArgentinaGerencia Investigación y Aplicaciones, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, ArgentinaGerencia Materiales, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, ArgentinaGerencia Materiales, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, ArgentinaGerencia Investigación y Aplicaciones, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina; Corresponding author.In this contribution some aspects of the behavior of the ASTM A335 P91 (9Cr1MoVNbN) steel subjected to continuous cooling cycles under fixed austenitization conditions are studied. Representative samples of the structures obtained after cooling at moderate rates (i.e. pure martensitic and mixed martensitic-ferritic) were analyzed in order to incorporate information to the Continuous Cooling Transformation (CCT) diagram of this material. The characterization was carried out by means of scanning and transmission electron microscopy (TEM), X-ray diffraction and Mössbauer spectroscopy. For the working conditions here employed, the results showed the existence of retained austenite within both, the pure martensitic and the mixed martensitic-ferritic domains of cooling rates, adding important information to the CCT diagram since retained austenite presence could be detrimental to the mechanical properties of the steel. Second phase precipitates, being relevant to fix the mechanical behavior of the material, were identified by means of TEM on carbon replicas. Mössbauer spectroscopy was very helpful to detect a low volume fraction of cementite-type phase in all of the samples, considering that it could not be conclusively determined by XRD due to orientation effects. Keywords: Ferritic-martensitic steels, Scanning and transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopyhttp://www.sciencedirect.com/science/article/pii/S2238785418300723 |
| spellingShingle | Denise Alejandra Carrizo Jorge Ignacio Besoky María Luppo Claudio Danon Cinthia Paula Ramos Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate rates Journal of Materials Research and Technology |
| title | Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate rates |
| title_full | Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate rates |
| title_fullStr | Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate rates |
| title_full_unstemmed | Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate rates |
| title_short | Characterization of an ASTM A335 P91 ferritic-martensitic steel after continuous cooling cycles at moderate rates |
| title_sort | characterization of an astm a335 p91 ferritic martensitic steel after continuous cooling cycles at moderate rates |
| url | http://www.sciencedirect.com/science/article/pii/S2238785418300723 |
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