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Age-hardening by metastable phases in an experimental Au–Ag–Cu–Pd alloy

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dc.contributor.authorLee, Jae-Ho-
dc.contributor.authorYi, Sang-Joon-
dc.contributor.authorSeol, Hyo-Joung-
dc.contributor.authorKwon, Yong Hoon-
dc.contributor.authorLee, Jai-Bong-
dc.contributor.authorKim, Hyung-Il-
dc.date.accessioned2010-09-09T07:01:05Z-
dc.date.available2010-09-09T07:01:05Z-
dc.date.issued2006-11-
dc.identifier.citationJournal of Alloys and Compounds 425 (2006) 210–215en
dc.identifier.issn0925-8388-
dc.identifier.urihttps://hdl.handle.net/10371/69792-
dc.description.abstractThe age-hardening mechanism and phase transformation during the age-hardening process were examined for a low carat gold alloy with a composition of 30 wt.% Au–30 wt.% Ag–20 wt.% Cu–20 wt.% Pd. By aging the solution-treated specimen, the fcc α0 phase was transformed into the Au-containing Ag-rich phase and the Pd-containing AuCu I phase through the metastable state. The phase transformation of the α0 phase into the metastable Ag-rich α′1 and AuCu I′ phases caused the apparent hardness increase. And the phase transformation of the Ag-rich α′1 and AuCu I′ phases into the Ag-rich α1 and AuCu I phases, caused the hardness decrease. The hardness increase in the early stage of the age-hardening process seemed to be caused by an introduction of the coherency strains at the interface between the metastable Ag-rich α′1 and AuCu I′ phases during the phase transformation of α0 into Ag-rich α′1 and AuCu I′. In the later stage of aging process, the alternative lamellar structure composed of the Au-containing Ag-rich phase and the Pd-containing AuCu I phase grew from the grain boundary consuming the Ag-rich α′1 and AuCu I′ phases in the grain interior, which caused the hardness decrease by releasing the coherency strains.en
dc.language.isoenen
dc.publisherElsevieren
dc.subjectDental alloysen
dc.subjectScanning electron microscopyen
dc.subjectX-ray diffractionen
dc.titleAge-hardening by metastable phases in an experimental Au–Ag–Cu–Pd alloyen
dc.typeArticleen
dc.contributor.AlternativeAuthor이재호-
dc.contributor.AlternativeAuthor이상준-
dc.contributor.AlternativeAuthor설효정-
dc.contributor.AlternativeAuthor권용훈-
dc.contributor.AlternativeAuthor이재봉-
dc.contributor.AlternativeAuthor김형일-
dc.identifier.doi10.1016/j.jallcom.2006.01.081-
Appears in Collections:
College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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