Evaluation of the thermal aging of delta-ferrite in austenitic stainless steel welds by electrochemical analysis

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dc.contributor.authorSubramanian, Gokul Obulanko
dc.contributor.authorKong, Byeong Seoko
dc.contributor.authorLee, Ho Jungko
dc.contributor.authorJang, Changheuiko
dc.date.accessioned2018-11-12T04:18:32Z-
dc.date.available2018-11-12T04:18:32Z-
dc.date.created2018-10-22-
dc.date.created2018-10-22-
dc.date.created2018-10-22-
dc.date.created2018-10-22-
dc.date.issued2018-10-
dc.identifier.citationSCIENTIFIC REPORTS, v.8-
dc.identifier.issn2045-2322-
dc.identifier.urihttp://hdl.handle.net/10203/246317-
dc.description.abstractCr-segregation by spinodal decomposition and G-phase precipitation were observed in delta-ferrite of austenitic stainless steel welds thermally aged at 400 degrees C for up to 20,000 h. A reversion heat treatment (R-HT) at 550 degrees C for 1 h dissolved the Cr-segregation in the aged welds while some intermetallic precipitates were present. The double-loop electrochemical potentiokinetic reactivation (DL-EPR) analysis showed no significant differences among them. However, after selective etching of the austenite phase, the DL-EPR values of delta-ferrite phase steadily increased with aging time due to the growth of Cr-depleted regions by spinodal decomposition. The electrochemical behavior of delta-ferrite after R-HT condition was similar to that of unaged welds, indicating the intermetallic precipitates did not affect the corrosion resistance in this case. Overall, DL-EPR analysis of delta-ferrite phase provided better correlation with spinodal decomposition.-
dc.languageEnglish-
dc.publisherNATURE PUBLISHING GROUP-
dc.titleEvaluation of the thermal aging of delta-ferrite in austenitic stainless steel welds by electrochemical analysis-
dc.typeArticle-
dc.identifier.wosid000446856000038-
dc.identifier.scopusid2-s2.0-85054684837-
dc.type.rimsART-
dc.citation.volume8-
dc.citation.publicationnameSCIENTIFIC REPORTS-
dc.identifier.doi10.1038/s41598-018-33422-x-
dc.contributor.localauthorJang, Changheui-
dc.contributor.nonIdAuthorKong, Byeong Seo-
dc.contributor.nonIdAuthorLee, Ho Jung-
dc.description.isOpenAccessY-
dc.type.journalArticleArticle-
dc.subject.keywordPlus475 DEGREES-C-
dc.subject.keywordPlusG-PHASE PRECIPITATION-
dc.subject.keywordPlusLOW-TEMPERATURE-
dc.subject.keywordPlusCORROSION-RESISTANCE-
dc.subject.keywordPlusSPINODAL DECOMPOSITION-
dc.subject.keywordPlusMECHANICAL-PROPERTIES-
dc.subject.keywordPlusLOCALIZED CORROSION-
dc.subject.keywordPlusFRACTURE-TOUGHNESS-
dc.subject.keywordPlusALPHA-PRIME-
dc.subject.keywordPlusATOM-PROBE-
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