The effect of microstructure on creep behavior of a powder metallurgy (PM) beta gamma alloy.
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| Title: | The effect of microstructure on creep behavior of a powder metallurgy (PM) beta gamma alloy. |
|---|---|
| Authors: | Seo, D.1 dongyi.seo@nrc-cnrc.gc.ca, Sawatzky, T.2, Saari, H.2, Kim, D.3, Au, P.1, Seok, C.4 |
| Source: | Journal of Mechanical Science & Technology. Jul2012, Vol. 26 Issue 7, p2009-2013. 5p. |
| Subjects: | Microstructure, Creep (Materials), Powder metallurgy, Alloy analysis, Titanium aluminides, Isostatic pressing, Heat treatment of metals |
| Abstract: | Pre-alloyed beta gamma titanium aluminide powder with a nominal composition of TiAl-2Nb-2Mo (G2) is consolidated by hot isostatic pressing. After consolidation, a step cooled heat treatment is performed to homogenize the material and produce a fully lamellar microstructure. Various aging heat treatments are then performed to form interfacial beta phase precipitates along lamellar interfaces. The step cooled heat treatment produces a relatively fine microstructure with an average lamellar grain size of 40 μm. The aging heat treatments generate beta phase precipitates along lamellar grain boundaries as well as along lamellar interfaces, and result in limited lamellar degradation and grain growth. However, coarse intergranular grains consisting of beta and gamma grains form during aging. Constant load tensile creep tests are performed on step cooled heat treated and aged specimens. Primary creep resistance, generally, improves with aging time, even with interfacial precipitation, and the limited lamellar degradation occurs with aging. However, total creep life of aged samples decreases with aging time. The microstructures of the tested specimens are characterized and related to the creep behaviour of the TiAl-2Nb-2Mo alloy in the un-aged and aged conditions. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Mechanical Science & Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 77684371 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The effect of microstructure on creep behavior of a powder metallurgy (PM) beta gamma alloy. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Seo%2C+D%2E%22">Seo, D.</searchLink><relatesTo>1</relatesTo><i> dongyi.seo@nrc-cnrc.gc.ca</i><br /><searchLink fieldCode="AR" term="%22Sawatzky%2C+T%2E%22">Sawatzky, T.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Saari%2C+H%2E%22">Saari, H.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kim%2C+D%2E%22">Kim, D.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Au%2C+P%2E%22">Au, P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Seok%2C+C%2E%22">Seok, C.</searchLink><relatesTo>4</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Mechanical+Science+%26+Technology%22">Journal of Mechanical Science & Technology</searchLink>. Jul2012, Vol. 26 Issue 7, p2009-2013. 5p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Creep+%28Materials%29%22">Creep (Materials)</searchLink><br /><searchLink fieldCode="DE" term="%22Powder+metallurgy%22">Powder metallurgy</searchLink><br /><searchLink fieldCode="DE" term="%22Alloy+analysis%22">Alloy analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+aluminides%22">Titanium aluminides</searchLink><br /><searchLink fieldCode="DE" term="%22Isostatic+pressing%22">Isostatic pressing</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+treatment+of+metals%22">Heat treatment of metals</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Pre-alloyed beta gamma titanium aluminide powder with a nominal composition of TiAl-2Nb-2Mo (G2) is consolidated by hot isostatic pressing. After consolidation, a step cooled heat treatment is performed to homogenize the material and produce a fully lamellar microstructure. Various aging heat treatments are then performed to form interfacial beta phase precipitates along lamellar interfaces. The step cooled heat treatment produces a relatively fine microstructure with an average lamellar grain size of 40 μm. The aging heat treatments generate beta phase precipitates along lamellar grain boundaries as well as along lamellar interfaces, and result in limited lamellar degradation and grain growth. However, coarse intergranular grains consisting of beta and gamma grains form during aging. Constant load tensile creep tests are performed on step cooled heat treated and aged specimens. Primary creep resistance, generally, improves with aging time, even with interfacial precipitation, and the limited lamellar degradation occurs with aging. However, total creep life of aged samples decreases with aging time. The microstructures of the tested specimens are characterized and related to the creep behaviour of the TiAl-2Nb-2Mo alloy in the un-aged and aged conditions. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Mechanical Science & Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s12206-012-0504-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 2009 Subjects: – SubjectFull: Microstructure Type: general – SubjectFull: Creep (Materials) Type: general – SubjectFull: Powder metallurgy Type: general – SubjectFull: Alloy analysis Type: general – SubjectFull: Titanium aluminides Type: general – SubjectFull: Isostatic pressing Type: general – SubjectFull: Heat treatment of metals Type: general Titles: – TitleFull: The effect of microstructure on creep behavior of a powder metallurgy (PM) beta gamma alloy. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Seo, D. – PersonEntity: Name: NameFull: Sawatzky, T. – PersonEntity: Name: NameFull: Saari, H. – PersonEntity: Name: NameFull: Kim, D. – PersonEntity: Name: NameFull: Au, P. – PersonEntity: Name: NameFull: Seok, C. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 1738494X Numbering: – Type: volume Value: 26 – Type: issue Value: 7 Titles: – TitleFull: Journal of Mechanical Science & Technology Type: main |
| ResultId | 1 |
