Repository logo
 
Publication

Fracture toughness of the heat affected zone on Nd-YAG laser welded joints

2009-06Journal article Open access
Simple item page
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.fosEngenharia e Tecnologia::Outras Engenharias e Tecnologias
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorCosta, J.M.
dc.contributor.authorFerreira, J.M.
dc.contributor.authorCapela, C.
dc.contributor.authorCapela, Carlos
dc.date.accessioned2025-04-29T17:18:16Z
dc.date.available2025-04-29T17:18:16Z
dc.date.issued2009-06
dc.description.abstractLaser deposit welding based on modern Nd-YAG lasers is a new mould repair process with advantages relatively to the traditional methods (Micro-plasma and TIG methods). For moulds steels there are no research studies about the laser deposit welding process effects in respect to fracture toughness, hardness and residual stresses variations in the laser-deposited layer and in the heat affected zone. These variations will have an important influence in the thermal-mechanical fatigue strength of the moulds parts. This paper is concerned on the study of the fracture toughness of transient microstructure regions in Nd-YAG laser welded joints performed in mould steels. Fracture toughness tests were performed in two hot-working tool steels: AISI H13 and AISI P20. Small welded specimens were prepared with U notches and filled with laser welding deposits. The hardness profiles were obtained at the middle cross-section of specimens against distance to the surface in order to identify the microstructures present at the crack tip region. Fracture toughness was evaluated and plotted against the Vickers hardness measured at the fatigue crack tip. Depending of the crack tip depth two very different toughness levels were observed in the H13 steel, while a lower variation of toughness was observed for the P20 steel. The values of fracture toughness observed in each specimen are consistent with the correspondent crack tip microstructure hardness.eng
dc.description.sponsorshipThe authors would like to acknowledge POCI programme, Project POCI/EME/55918/2004, for funding the work reported and Anibal H. Abrantes S.A. company for performing the laser welds.
dc.identifier.citationJ.M. Costa, J.M. Ferreira, C. Capela, Fracture toughness of the heat affected zone on Nd-YAG laser welded joints, Engineering Failure Analysis, Volume 16, Issue 4, 2009, Pages 1245-1251, ISSN 1350-6307, https://doi.org/10.1016/j.engfailanal.2008.08.002.
dc.identifier.doi10.1016/j.engfailanal.2008.08.002
dc.identifier.issn1350-6307
dc.identifier.urihttp://hdl.handle.net/10400.8/12836
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationPOCI/EME/55918/2004
dc.relation.hasversionhttps://www.sciencedirect.com/science/article/pii/S135063070800160X
dc.relation.ispartofEngineering Failure Analysis
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMould producing
dc.subjectLaser repairing
dc.subjectWelded joints
dc.subjectFracture toughness
dc.titleFracture toughness of the heat affected zone on Nd-YAG laser welded jointseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1251
oaire.citation.issue4
oaire.citation.startPage1245
oaire.citation.titleEngineering Failure Analysis
oaire.citation.volume16
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCapela
person.givenNameCarlos
person.identifier.ciencia-id9B1E-6857-3D6B
person.identifier.orcid0000-0003-3334-4945
person.identifier.ridG-6395-2016
person.identifier.scopus-author-id7801358401
relation.isAuthorOfPublication9b079aa3-b79b-4395-b081-1f23d6a17514
relation.isAuthorOfPublication.latestForDiscovery9b079aa3-b79b-4395-b081-1f23d6a17514

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Fracture toughness of the heat affected zone on Nd-YAG laser welded joints.pdf
Size:
203.92 KB
Format:
Adobe Portable Document Format
Description:
Laser deposit welding based on modern Nd-YAG lasers is a new mould repair process with advantages relatively to the traditional methods (Micro-plasma and TIG methods). For moulds steels there are no research studies about the laser deposit welding process effects in respect to fracture toughness, hardness and residual stresses variations in the laser-deposited layer and in the heat affected zone. These variations will have an important influence in the thermal-mechanical fatigue strength of the moulds parts. This paper is concerned on the study of the fracture toughness of transient microstructure regions in Nd-YAG laser welded joints performed in mould steels. Fracture toughness tests were performed in two hot-working tool steels: AISI H13 and AISI P20. Small welded specimens were prepared with U notches and filled with laser welding deposits. The hardness profiles were obtained at the middle cross-section of specimens against distance to the surface in order to identify the microstructures present at the crack tip region. Fracture toughness was evaluated and plotted against the Vickers hardness measured at the fatigue crack tip. Depending of the crack tip depth two very different toughness levels were observed in the H13 steel, while a lower variation of toughness was observed for the P20 steel. The values of fracture toughness observed in each specimen are consistent with the correspondent crack tip microstructure hardness.
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.32 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CDRsp - Artigos em revistas internacionais
ESTG - Artigos em revistas internacionais