INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEEL
The formation of sigma phase in duplex stainless steels during isothermal aging is widely reported in the literature, but the influence of strain hardening prior to aging on the kinetics of formation of this phase was not a subject of systematic studies so far. The objective of this paper is to st...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia, Materiais e Mineração
2012-09-01
|
| Series: | Tecnologia em Metalurgia, Materiais e Mineração |
| Subjects: | |
| Online Access: | http://www.tecnologiammm.com.br/files/v9n3/v9n3a03.pdf |
| _version_ | 1797711526845480960 |
|---|---|
| author | Rodrigo Magnabosco Camila Carioni de Ávila Fernando Maraccini Rabechini |
| author_facet | Rodrigo Magnabosco Camila Carioni de Ávila Fernando Maraccini Rabechini |
| author_sort | Rodrigo Magnabosco |
| collection | DOAJ |
| description | The formation of sigma phase in duplex stainless steels during isothermal aging is widely reported in the literature,
but the influence of strain hardening prior to aging on the kinetics of formation of this phase was not a subject of systematic
studies so far. The objective of this paper is to study the influence of cold work degree and aging time in aging at 650°C or
850°C of an UNS S31803 steel. Cold rolling was conducted, resulting in four sets of samples with 0%, 10%, 30% or 80%
cross sectional area reduction. Those samples were submitted to isothermal aging between 10 minutes and 96 hours,
followed by water quenching. Sigma phase quantification is possible after selective electrolytic etching with 10% KOH
solution, and the volume fraction of ferrite is obtained with the aid of ferritscope. It is observed that increasing the
strain hardening increases the possibility of heterogeneous nucleation of sigma phase within the ferrite grains, leading to
increased rate of formation of sigma and consumption of ferrite with increasing aging time at both temperatures studied. |
| first_indexed | 2024-03-12T07:08:20Z |
| format | Article |
| id | doaj.art-a3aa77284dbf4371b394c8a3598e9fe1 |
| institution | Directory Open Access Journal |
| issn | 2176-1515 2176-1523 |
| language | English |
| last_indexed | 2024-03-12T07:08:20Z |
| publishDate | 2012-09-01 |
| publisher | Associação Brasileira de Metalurgia, Materiais e Mineração |
| record_format | Article |
| series | Tecnologia em Metalurgia, Materiais e Mineração |
| spelling | doaj.art-a3aa77284dbf4371b394c8a3598e9fe12023-09-02T23:16:39ZengAssociação Brasileira de Metalurgia, Materiais e MineraçãoTecnologia em Metalurgia, Materiais e Mineração2176-15152176-15232012-09-0193190196http://dx.doi.org/10.4322/tmm.2012.027INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEELRodrigo Magnabosco0Camila Carioni de Ávila 1Fernando Maraccini Rabechini2Engenheiro Metalurgista, Professor Doutor do Departamento de Engenharia de Materiais do Centro Universitário da Fundação Educacional Inaciana Pe. Sabóia de Medeiros – FEI Aluna de graduação do Departamento de Engenharia Mecânica do Centro Universitário da Fundação Educacional Inaciana Pe. Sabóia de Medeiros – FEIAluno de graduação do Departamento de Engenharia Mecânica do Centro Universitário da Fundação Educacional Inaciana Pe. Sabóia de Medeiros – FEI, The formation of sigma phase in duplex stainless steels during isothermal aging is widely reported in the literature, but the influence of strain hardening prior to aging on the kinetics of formation of this phase was not a subject of systematic studies so far. The objective of this paper is to study the influence of cold work degree and aging time in aging at 650°C or 850°C of an UNS S31803 steel. Cold rolling was conducted, resulting in four sets of samples with 0%, 10%, 30% or 80% cross sectional area reduction. Those samples were submitted to isothermal aging between 10 minutes and 96 hours, followed by water quenching. Sigma phase quantification is possible after selective electrolytic etching with 10% KOH solution, and the volume fraction of ferrite is obtained with the aid of ferritscope. It is observed that increasing the strain hardening increases the possibility of heterogeneous nucleation of sigma phase within the ferrite grains, leading to increased rate of formation of sigma and consumption of ferrite with increasing aging time at both temperatures studied.http://www.tecnologiammm.com.br/files/v9n3/v9n3a03.pdfSigma phase; Duplex stainless steel; Transformation kinetics. |
| spellingShingle | Rodrigo Magnabosco Camila Carioni de Ávila Fernando Maraccini Rabechini INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEEL Tecnologia em Metalurgia, Materiais e Mineração Sigma phase; Duplex stainless steel; Transformation kinetics. |
| title | INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEEL |
| title_full | INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEEL |
| title_fullStr | INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEEL |
| title_full_unstemmed | INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEEL |
| title_short | INFLUENCE OF COLD WORK ON SIGMA PHASE FORMATION IN DUPLEX STAINLESS STEEL |
| title_sort | influence of cold work on sigma phase formation in duplex stainless steel |
| topic | Sigma phase; Duplex stainless steel; Transformation kinetics. |
| url | http://www.tecnologiammm.com.br/files/v9n3/v9n3a03.pdf |
| work_keys_str_mv | AT rodrigomagnabosco influenceofcoldworkonsigmaphaseformationinduplexstainlesssteel AT camilacarionideavila influenceofcoldworkonsigmaphaseformationinduplexstainlesssteel AT fernandomaraccinirabechini influenceofcoldworkonsigmaphaseformationinduplexstainlesssteel |