Experimental investigation of delta phase precipitation in inconel 625 superalloy aged at 550, 625 and 725 °C

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dc.contributor.authorBaldan R.
dc.contributor.authorda Silva A.A.A.P.
dc.contributor.authorTanno T.M.
dc.contributor.authorda Costa E.T.
dc.contributor.authorBrentegani J.V.N.
dc.contributor.authorCouto A.A.
dc.date.accessioned2024-03-12T23:49:38Z
dc.date.available2024-03-12T23:49:38Z
dc.date.issued2020
dc.description.abstract© 2020 Universidade Federal de Sao Carlos. All rights reserved.The δ is an important stable phase that replaces the metastable γ'' in the microstructure of Inconel 625 superalloy. The present work aims to investigate the kinetic of δ-phase precipitation in the microstructure of Inconel 625 nickel-based superalloy aged at 550, 625 and 725 °C up to 1000 h. Aging temperatures were chosen based on the thermodynamic simulation using JMatPro software which indicated that this phase is stable at temperatures below 905 °C. Microstructure of the heat-treated samples was analyzed via SEM/EDS and microhardness evolution was performed by Vickers microhardness tests. The results have shown that the samples aged at 550 °C (all times), 625 °C (all times) and 725 °C up to 200 h did not presented microstructural evidences of δ precipitation. However, samples aged at 725 °C for 500 and 1000 h clearly presented an acicular δ-phase precipitated mainly at the grain boundaries. It was noted changes in the microhardness at different aging time and temperatures probably due to the presence of γ'' and/or δ phases. The sample aged at 625 °C for 1000 h presented the highest microhardness value (333 ± 10 HV).
dc.description.issuenumber1
dc.description.volume23
dc.identifier.doi10.1590/1980-5373-MR-2019-0546
dc.identifier.issn1980-5373
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35074
dc.relation.ispartofMaterials Research
dc.rightsAcesso Aberto
dc.subject.otherlanguageAging
dc.subject.otherlanguageDelta phase
dc.subject.otherlanguageInconel 625
dc.subject.otherlanguageMicrostructure
dc.subject.otherlanguageSuperalloy
dc.titleExperimental investigation of delta phase precipitation in inconel 625 superalloy aged at 550, 625 and 725 °C
dc.typeArtigo
local.scopus.citations7
local.scopus.eid2-s2.0-85093653233
local.scopus.subjectAging temperatures
local.scopus.subjectAging time and temperatures
local.scopus.subjectExperimental investigations
local.scopus.subjectInconel 625 superalloys
local.scopus.subjectMicrohardness evolutions
local.scopus.subjectNickel- based superalloys
local.scopus.subjectThermodynamic simulations
local.scopus.subjectVickers microhardness tests
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85093653233&origin=inward
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