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dc.contributor.authorWei, Chao-Nanen_US
dc.contributor.authorBor, Hui-Yunen_US
dc.contributor.authorChang, Lien_US
dc.date.accessioned2014-12-08T15:12:45Z-
dc.date.available2014-12-08T15:12:45Z-
dc.date.issued2008-01-01en_US
dc.identifier.issn1345-9678en_US
dc.identifier.urihttp://dx.doi.org/10.2320/matertrans.MER2007088en_US
dc.identifier.urihttp://hdl.handle.net/11536/9820-
dc.description.abstractThis study investigates how hot isostatic pressing (HIP) affects the microstructure and fracture modes of CM-681LC superalloy. As-cast test bars with grain size of 80 mu m were prepared using the fine-grain process followed by HIP. Experimental results indicate that micropores formed during solidification and contraction degrade the tensile strengths and elongations of the fine-grain CM-681LC superalloy before HIP. The area fraction of micropores was reduced from 0.2% to 0.06% following HIP. Scriptlike MC carbides decompose into particlelike M23C6 carbides during HIP, revealing that HIP refines and spheroidizes the carbides. Eliminating the micropores and refining the carbides increases the mechanical strength by up to about 9% and the elongation by over 10% in room- and high-temperature tensile tests. The fracture analyses after tensile tests of the fine-grain test bars reveal that the microporosity and the scriptlike carbides at the grain boundaries are the main causes of the fracture of the test bars before HIP. The fracture mode of the fine-grain test bars following HIP, according to the tensile test, is typically intergranular because the micropores are eliminated and the carbides are refined. Since the elimination of the micropores and refinement of the carbides by HIP effectively improves the tensile strength and elongation, the fine-grain casting yields favorable mechanical properties.en_US
dc.language.isoen_USen_US
dc.subjecthot isostatic pressingen_US
dc.subjectfine-grainen_US
dc.subjectsuperalloyen_US
dc.subjectcarbideen_US
dc.subjecttensile testen_US
dc.titleEffect of hot isostatic pressing on microstructure and mechanical properties of CM-681LC nickel-base superalloy using microcasten_US
dc.typeArticleen_US
dc.identifier.doi10.2320/matertrans.MER2007088en_US
dc.identifier.journalMATERIALS TRANSACTIONSen_US
dc.citation.volume49en_US
dc.citation.issue1en_US
dc.citation.spage193en_US
dc.citation.epage201en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000253442100033-
dc.citation.woscount4-
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