High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.matchar.2015.08.002 http://hdl.handle.net/11449/167957 |
Resumo: | Abstract In this paper, the high-temperature creep resistance and effects on the austenite reversion and the dynamic evolution of precipitates of maraging 300 steel were investigated. The main strengthening mechanism in a solution treated and aged material is the fine needle shaped Ni<inf>3</inf>(Ti,Mo) precipitates densely dispersed in a single martensitic phase. The specimens were submitted to creep tests at temperatures of 550, 600 and 650 °C and stress conditions of 200, 300 and 500 MPa. Stress exponent (n) varied from 6.0 to 7.2 and activation energy for creep (Q<inf>c</inf>) from 364 to 448 kJ/mol, associated to the tangled and cells arrangements of the dislocations, show that the dominant creep mechanism is controlled by dislocations climb and slip. The experimentally determined threshold stresses are about 25 MPa at 550 °C and close to 4 MPa at 600 and 650 °C. Due to high-temperature creep exposure, part of martensite was reverted to austenite in a range of 17.2% to 48.5%, depending upon the time, temperature and applied stress. At the same time, the Ni<inf>3</inf>(Ti,Mo) precipitates were coarsened and Fe<inf>2</inf>Mo precipitated, leading to undesirable alloy's strength reduction. Volume fraction of reverted austenite showed strong negative correlation with hardness. Fracture surfaces of specimens presented ductile failure consisting of equiaxed and bi-modal dimples in the fibrous zone surrounded by 45° shear lip. |
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High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steelCreepIntermetallic precipitatesMaraging 300 steelReverted austeniteAbstract In this paper, the high-temperature creep resistance and effects on the austenite reversion and the dynamic evolution of precipitates of maraging 300 steel were investigated. The main strengthening mechanism in a solution treated and aged material is the fine needle shaped Ni<inf>3</inf>(Ti,Mo) precipitates densely dispersed in a single martensitic phase. The specimens were submitted to creep tests at temperatures of 550, 600 and 650 °C and stress conditions of 200, 300 and 500 MPa. Stress exponent (n) varied from 6.0 to 7.2 and activation energy for creep (Q<inf>c</inf>) from 364 to 448 kJ/mol, associated to the tangled and cells arrangements of the dislocations, show that the dominant creep mechanism is controlled by dislocations climb and slip. The experimentally determined threshold stresses are about 25 MPa at 550 °C and close to 4 MPa at 600 and 650 °C. Due to high-temperature creep exposure, part of martensite was reverted to austenite in a range of 17.2% to 48.5%, depending upon the time, temperature and applied stress. At the same time, the Ni<inf>3</inf>(Ti,Mo) precipitates were coarsened and Fe<inf>2</inf>Mo precipitated, leading to undesirable alloy's strength reduction. Volume fraction of reverted austenite showed strong negative correlation with hardness. Fracture surfaces of specimens presented ductile failure consisting of equiaxed and bi-modal dimples in the fibrous zone surrounded by 45° shear lip.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Instituto Tecnologico de Aeronautica - ITA, Pr. M. Eduardo Gomes, 50Universidade Estadual Paulista - UNESP, ICT, Rodovia Presidente Dutra, km 137,8Universidade Federal de São Paulo - UNIFESP, R. Talim, 330Instituto de Estudos Avançados - IEAv, Rodovia dos Tamoios km 5,5Universidade Estadual Paulista - UNESP, ICT, Rodovia Presidente Dutra, km 137,8CNPq: 014/08CNPq: 141274/2013-1CNPq: 475194/2011-0Instituto Tecnologico de Aeronautica - ITAUniversidade Estadual Paulista (Unesp)Universidade Federal de São Paulo (UNIFESP)Instituto de Estudos Avançados - IEAvDos Reis, Adriano Gonçalves [UNESP]Reis, Danieli Aparecida PereiraAbdalla, Antônio JorgeOtubo, Jorge2018-12-11T16:39:01Z2018-12-11T16:39:01Z2015-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article350-357application/pdfhttp://dx.doi.org/10.1016/j.matchar.2015.08.002Materials Characterization, v. 107, p. 350-357.1044-5803http://hdl.handle.net/11449/16795710.1016/j.matchar.2015.08.0022-s2.0-849391415382-s2.0-84939141538.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Characterization1,291info:eu-repo/semantics/openAccess2023-12-09T06:21:58Zoai:repositorio.unesp.br:11449/167957Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-09T06:21:58Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel |
title |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel |
spellingShingle |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel Dos Reis, Adriano Gonçalves [UNESP] Creep Intermetallic precipitates Maraging 300 steel Reverted austenite |
title_short |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel |
title_full |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel |
title_fullStr |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel |
title_full_unstemmed |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel |
title_sort |
High-temperature creep resistance and effects on the austenite reversion and precipitation of 18 Ni (300) maraging steel |
author |
Dos Reis, Adriano Gonçalves [UNESP] |
author_facet |
Dos Reis, Adriano Gonçalves [UNESP] Reis, Danieli Aparecida Pereira Abdalla, Antônio Jorge Otubo, Jorge |
author_role |
author |
author2 |
Reis, Danieli Aparecida Pereira Abdalla, Antônio Jorge Otubo, Jorge |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Instituto Tecnologico de Aeronautica - ITA Universidade Estadual Paulista (Unesp) Universidade Federal de São Paulo (UNIFESP) Instituto de Estudos Avançados - IEAv |
dc.contributor.author.fl_str_mv |
Dos Reis, Adriano Gonçalves [UNESP] Reis, Danieli Aparecida Pereira Abdalla, Antônio Jorge Otubo, Jorge |
dc.subject.por.fl_str_mv |
Creep Intermetallic precipitates Maraging 300 steel Reverted austenite |
topic |
Creep Intermetallic precipitates Maraging 300 steel Reverted austenite |
description |
Abstract In this paper, the high-temperature creep resistance and effects on the austenite reversion and the dynamic evolution of precipitates of maraging 300 steel were investigated. The main strengthening mechanism in a solution treated and aged material is the fine needle shaped Ni<inf>3</inf>(Ti,Mo) precipitates densely dispersed in a single martensitic phase. The specimens were submitted to creep tests at temperatures of 550, 600 and 650 °C and stress conditions of 200, 300 and 500 MPa. Stress exponent (n) varied from 6.0 to 7.2 and activation energy for creep (Q<inf>c</inf>) from 364 to 448 kJ/mol, associated to the tangled and cells arrangements of the dislocations, show that the dominant creep mechanism is controlled by dislocations climb and slip. The experimentally determined threshold stresses are about 25 MPa at 550 °C and close to 4 MPa at 600 and 650 °C. Due to high-temperature creep exposure, part of martensite was reverted to austenite in a range of 17.2% to 48.5%, depending upon the time, temperature and applied stress. At the same time, the Ni<inf>3</inf>(Ti,Mo) precipitates were coarsened and Fe<inf>2</inf>Mo precipitated, leading to undesirable alloy's strength reduction. Volume fraction of reverted austenite showed strong negative correlation with hardness. Fracture surfaces of specimens presented ductile failure consisting of equiaxed and bi-modal dimples in the fibrous zone surrounded by 45° shear lip. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-09-01 2018-12-11T16:39:01Z 2018-12-11T16:39:01Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.matchar.2015.08.002 Materials Characterization, v. 107, p. 350-357. 1044-5803 http://hdl.handle.net/11449/167957 10.1016/j.matchar.2015.08.002 2-s2.0-84939141538 2-s2.0-84939141538.pdf |
url |
http://dx.doi.org/10.1016/j.matchar.2015.08.002 http://hdl.handle.net/11449/167957 |
identifier_str_mv |
Materials Characterization, v. 107, p. 350-357. 1044-5803 10.1016/j.matchar.2015.08.002 2-s2.0-84939141538 2-s2.0-84939141538.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Characterization 1,291 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
350-357 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797789951253807104 |