Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe
Main Author: | |
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Publication Date: | 2014 |
Other Authors: | , , , , , , , |
Format: | Conference object |
Language: | eng |
Source: | Repositório Institucional da UNESP |
Download full: | http://dx.doi.org/10.1016/j.mspro.2014.06.122 http://hdl.handle.net/11449/184812 |
Summary: | Fatigue crack usually initiates at welded joints of structural elements. For a high-responsibility aeronautic component, called Motor-Cradle - critical to the flight safety -, successive weld repairs are carried out toward restoring the original condition of the aircraft and extending the in-service life of them. Motivated by the high fracture incidence on this particular component an extensive research program to evaluate the effects of maintenance weld repairs on the structural integrity, mechanical properties and microstructural changes has been developed. In this research-work, a maintenance weld repair procedures widely employed along the useful life of aircrafts, characterized by overlapping the weld bead by gas tungsten arc welding with filler metal was investigated. From the data obtained with fatigue crack growth laboratorial tests in base material (BM), heat affected zone (HAZ) and weld metal (WM) the effects of successive TIG welding repairs on the structural integrity of AISI 4130 aeronautical steel were analysed. After TIG welding and re-welding processes, specimens were prepared in accordance with ASTM 647 standard and fatigue tested with constant amplitude (R=0,1) at 10 Hz frequency and room temperature. The obtained results were associated to the micro hardness and microstructure variations, as well as to the residual stresses field generated by the successive weld cycles. Key-conclusion is that welding repair increase the fatigue crack growth resistance in the weld metal and in the HAZ. (C) 2014 Published by Elsevier Ltd. |
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Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility AirframeAISI 4130 aeronautic steelTIG WeldingWelding RepairFlight-SafetyHAZFatigue crack usually initiates at welded joints of structural elements. For a high-responsibility aeronautic component, called Motor-Cradle - critical to the flight safety -, successive weld repairs are carried out toward restoring the original condition of the aircraft and extending the in-service life of them. Motivated by the high fracture incidence on this particular component an extensive research program to evaluate the effects of maintenance weld repairs on the structural integrity, mechanical properties and microstructural changes has been developed. In this research-work, a maintenance weld repair procedures widely employed along the useful life of aircrafts, characterized by overlapping the weld bead by gas tungsten arc welding with filler metal was investigated. From the data obtained with fatigue crack growth laboratorial tests in base material (BM), heat affected zone (HAZ) and weld metal (WM) the effects of successive TIG welding repairs on the structural integrity of AISI 4130 aeronautical steel were analysed. After TIG welding and re-welding processes, specimens were prepared in accordance with ASTM 647 standard and fatigue tested with constant amplitude (R=0,1) at 10 Hz frequency and room temperature. The obtained results were associated to the micro hardness and microstructure variations, as well as to the residual stresses field generated by the successive weld cycles. Key-conclusion is that welding repair increase the fatigue crack growth resistance in the weld metal and in the HAZ. (C) 2014 Published by Elsevier Ltd.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)UNESP Univ Estadual Paulista, Dept Mat & Technol FEG DMT, 333 Ariberto Pereira Cunha Ave, BR-12516410 Guaratingueta, SP, BrazilUNESP Univ Estadual Paulista, Dept Math FEG DMA, BR-12516410 Guaratingueta, SP, BrazilUNESP Univ Estadual Paulista, Dept Mat & Technol FEG DMT, 333 Ariberto Pereira Cunha Ave, BR-12516410 Guaratingueta, SP, BrazilUNESP Univ Estadual Paulista, Dept Math FEG DMA, BR-12516410 Guaratingueta, SP, BrazilFAPESP: 1999/11948-6FAPESP: 2008/56424-5Elsevier B.V.Universidade Estadual Paulista (Unesp)Nascimento, Marcelino P. [UNESP]Batista, Carolina C. [UNESP]Sorrija, Bruno A. [UNESP]Voorwald, Herman J. C. [UNESP]Zhang, Z.Skallerud, B.Thaulow, C.Ostby, E.He, J.2019-10-04T12:30:14Z2019-10-04T12:30:14Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject744-749http://dx.doi.org/10.1016/j.mspro.2014.06.12220th European Conference On Fracture. Amsterdam: Elsevier Science Bv, v. 3, p. 744-749, 2014.2211-8128http://hdl.handle.net/11449/18481210.1016/j.mspro.2014.06.122WOS:000398274600117Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPeng20th European Conference On Fractureinfo:eu-repo/semantics/openAccess2021-10-23T11:59:47Zoai:repositorio.unesp.br:11449/184812Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T11:59:47Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe |
title |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe |
spellingShingle |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe Nascimento, Marcelino P. [UNESP] AISI 4130 aeronautic steel TIG Welding Welding Repair Flight-Safety HAZ |
title_short |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe |
title_full |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe |
title_fullStr |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe |
title_full_unstemmed |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe |
title_sort |
Fatigue Crack Growth Investigation on a Maintenance Welding Repair Applied on a High Responsibility Airframe |
author |
Nascimento, Marcelino P. [UNESP] |
author_facet |
Nascimento, Marcelino P. [UNESP] Batista, Carolina C. [UNESP] Sorrija, Bruno A. [UNESP] Voorwald, Herman J. C. [UNESP] Zhang, Z. Skallerud, B. Thaulow, C. Ostby, E. He, J. |
author_role |
author |
author2 |
Batista, Carolina C. [UNESP] Sorrija, Bruno A. [UNESP] Voorwald, Herman J. C. [UNESP] Zhang, Z. Skallerud, B. Thaulow, C. Ostby, E. He, J. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Nascimento, Marcelino P. [UNESP] Batista, Carolina C. [UNESP] Sorrija, Bruno A. [UNESP] Voorwald, Herman J. C. [UNESP] Zhang, Z. Skallerud, B. Thaulow, C. Ostby, E. He, J. |
dc.subject.por.fl_str_mv |
AISI 4130 aeronautic steel TIG Welding Welding Repair Flight-Safety HAZ |
topic |
AISI 4130 aeronautic steel TIG Welding Welding Repair Flight-Safety HAZ |
description |
Fatigue crack usually initiates at welded joints of structural elements. For a high-responsibility aeronautic component, called Motor-Cradle - critical to the flight safety -, successive weld repairs are carried out toward restoring the original condition of the aircraft and extending the in-service life of them. Motivated by the high fracture incidence on this particular component an extensive research program to evaluate the effects of maintenance weld repairs on the structural integrity, mechanical properties and microstructural changes has been developed. In this research-work, a maintenance weld repair procedures widely employed along the useful life of aircrafts, characterized by overlapping the weld bead by gas tungsten arc welding with filler metal was investigated. From the data obtained with fatigue crack growth laboratorial tests in base material (BM), heat affected zone (HAZ) and weld metal (WM) the effects of successive TIG welding repairs on the structural integrity of AISI 4130 aeronautical steel were analysed. After TIG welding and re-welding processes, specimens were prepared in accordance with ASTM 647 standard and fatigue tested with constant amplitude (R=0,1) at 10 Hz frequency and room temperature. The obtained results were associated to the micro hardness and microstructure variations, as well as to the residual stresses field generated by the successive weld cycles. Key-conclusion is that welding repair increase the fatigue crack growth resistance in the weld metal and in the HAZ. (C) 2014 Published by Elsevier Ltd. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01 2019-10-04T12:30:14Z 2019-10-04T12:30:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.mspro.2014.06.122 20th European Conference On Fracture. Amsterdam: Elsevier Science Bv, v. 3, p. 744-749, 2014. 2211-8128 http://hdl.handle.net/11449/184812 10.1016/j.mspro.2014.06.122 WOS:000398274600117 |
url |
http://dx.doi.org/10.1016/j.mspro.2014.06.122 http://hdl.handle.net/11449/184812 |
identifier_str_mv |
20th European Conference On Fracture. Amsterdam: Elsevier Science Bv, v. 3, p. 744-749, 2014. 2211-8128 10.1016/j.mspro.2014.06.122 WOS:000398274600117 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
20th European Conference On Fracture |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
744-749 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science 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 |
|
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1799964449091616768 |