Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC
This work evaluates the phase transformations during aging of an UNS S31803 DSS at 650ºC and its influence on the DOS. The material was solution treated at 1175ºC and then aged at 650ºC for times up to 360 h. SEM-BSC images indicate the formation of Cr2N, σ and χ phases in the samples aged at 650ºC....
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2013-08-01
|
| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600017&tlng=en |
| _version_ | 1818732219466776576 |
|---|---|
| author | Evelin Barbosa de Mélo Rodrigo Magnabosco Carlos de Moura Neto |
| author_facet | Evelin Barbosa de Mélo Rodrigo Magnabosco Carlos de Moura Neto |
| author_sort | Evelin Barbosa de Mélo |
| collection | DOAJ |
| description | This work evaluates the phase transformations during aging of an UNS S31803 DSS at 650ºC and its influence on the DOS. The material was solution treated at 1175ºC and then aged at 650ºC for times up to 360 h. SEM-BSC images indicate the formation of Cr2N, σ and χ phases in the samples aged at 650ºC. The analysis of DL-EPR curves, obtained in a 1 M H2SO4 + 0.25 M NaCl + 0.01 M KSCN solution, shows an increase in DOS values for samples aged at 650ºC. Probably, this increase observed in DOS values is mainly related to the presence of Cr- and/or Mo-depleted α, as a result of σ phase, χ phase and/or Cr2N formation at 650ºC. Moreover, a possible healing up of Cr- and/ or Mo-depleted areas is observed between 1 h and 4 h of aging at 650ºC. |
| first_indexed | 2024-12-17T23:30:06Z |
| format | Article |
| id | doaj.art-cd1d6c0f06f44b37b03e48f414191451 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-17T23:30:06Z |
| publishDate | 2013-08-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-cd1d6c0f06f44b37b03e48f4141914512022-12-21T21:28:41ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392013-08-011661336134310.1590/S1516-14392013005000125Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºCEvelin Barbosa de Mélo0Rodrigo Magnabosco1Carlos de Moura Neto2Technological Institute of AeronauticsFundação Educacional Inaciana Padre Sabóia de MedeirosTechnological Institute of AeronauticsThis work evaluates the phase transformations during aging of an UNS S31803 DSS at 650ºC and its influence on the DOS. The material was solution treated at 1175ºC and then aged at 650ºC for times up to 360 h. SEM-BSC images indicate the formation of Cr2N, σ and χ phases in the samples aged at 650ºC. The analysis of DL-EPR curves, obtained in a 1 M H2SO4 + 0.25 M NaCl + 0.01 M KSCN solution, shows an increase in DOS values for samples aged at 650ºC. Probably, this increase observed in DOS values is mainly related to the presence of Cr- and/or Mo-depleted α, as a result of σ phase, χ phase and/or Cr2N formation at 650ºC. Moreover, a possible healing up of Cr- and/ or Mo-depleted areas is observed between 1 h and 4 h of aging at 650ºC.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600017&tlng=enduplex stainless steelDL-EPRdegree of sensitizationsigma phase |
| spellingShingle | Evelin Barbosa de Mélo Rodrigo Magnabosco Carlos de Moura Neto Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC Materials Research duplex stainless steel DL-EPR degree of sensitization sigma phase |
| title | Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC |
| title_full | Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC |
| title_fullStr | Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC |
| title_full_unstemmed | Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC |
| title_short | Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC |
| title_sort | influence of the microstructure on the degree of sensitization of a duplex stainless steel uns s31803 aged at 650ºc |
| topic | duplex stainless steel DL-EPR degree of sensitization sigma phase |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600017&tlng=en |
| work_keys_str_mv | AT evelinbarbosademelo influenceofthemicrostructureonthedegreeofsensitizationofaduplexstainlesssteelunss31803agedat650oc AT rodrigomagnabosco influenceofthemicrostructureonthedegreeofsensitizationofaduplexstainlesssteelunss31803agedat650oc AT carlosdemouraneto influenceofthemicrostructureonthedegreeofsensitizationofaduplexstainlesssteelunss31803agedat650oc |