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Rapid nondestructive assessment of the degrees of sensitization of 5456 aluminum alloys using laser-induced breakdown spectroscopy (LIBS) with multivariate analysis

hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorLIU, Lei
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorHUANG, Xi
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorDONG, Haoyu
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorMAO, Aofei
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorLI, Peizi
hal.structure.identifierDepartment of Mechanical and Materials Engineering
dc.contributor.authorCUI, Bai
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSILVAIN, Jean-François
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorLU, Yongfeng
dc.date.accessioned2023-11-20T17:27:34Z
dc.date.available2023-11-20T17:27:34Z
dc.date.issued2023
dc.identifier.issn0267-9477
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/185902
dc.description.abstractEnThe 5xxx series aluminum (Al)–magnesium (Mg) alloys are extensively used in marine transportation and naval ships due to their high strength-to-weight ratios and great corrosion resistance properties. However, material degradation of the 5xxx alloys occurs over time after exposure to environments at elevated temperatures, referred to as sensitization. Sensitization is characterized by β-phase (Mg2Al3) precipitates along the grain boundaries, which increase the susceptibility to intergranular corrosion (IGC) and stress corrosion cracking (SCC). Therefore, it is important to assess the degree of sensitization (DoS) in modern naval ships, whose structures are primarily made of Al–Mg alloys, to determine whether they have reached a DoS threshold that may require maintenance or repair activities. In this study, laser-induced breakdown spectroscopy (LIBS) with statistical multivariate analysis methods was successfully developed to assess the DoS levels of the 5xxx alloys. LIBS measurements were conducted after chemical etching on 5456 Al–Mg alloy samples with DoS values of 7.1 (unsensitized), 20.2 (indeterminate), and 47.3 (sensitized) mg cm−2, respectively. The statistical multivariate analysis method of principal component and discriminant function analysis (PC-DFA) was used to process the LIBS spectra to establish a calibration model used for prediction of Al alloys with unknown DoS values. For each alloy sample, a total of 400 LIBS spectra were acquired. 350 of them were used to establish the calibration model by PC-DFA and the remaining 50 were used as unknown spectra for external validation of the model established. External validation of the established classification model shows accuracies of 100%, 100%, and 82%, respectively, for predicting tested Al alloy samples with unsensitized, indeterminate, and sensitized DoS values. Successful external validation of the classification model established by PC-DFA indicates the ability for sensitization assessment of 5456 Al alloys with unknown DoS values. The technology developed has the capability for rapid and non-destructive sensitization assessment on site.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enRapid nondestructive assessment of the degrees of sensitization of 5456 aluminum alloys using laser-induced breakdown spectroscopy (LIBS) with multivariate analysis
dc.typeArticle de revue
dc.identifier.doi10.1039/D3JA00017F
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Analytical Atomic Spectrometry
bordeaux.page1494-1500
bordeaux.volume38
bordeaux.hal.laboratoriesInstitut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026*
bordeaux.issue7
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-04165060
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04165060v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Analytical%20Atomic%20Spectrometry&rft.date=2023&rft.volume=38&rft.issue=7&rft.spage=1494-1500&rft.epage=1494-1500&rft.eissn=0267-9477&rft.issn=0267-9477&rft.au=LIU,%20Lei&HUANG,%20Xi&DONG,%20Haoyu&MAO,%20Aofei&LI,%20Peizi&rft.genre=article


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