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https://hdl.handle.net/20.500.13091/165
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ataş, Mehmet Şahin | - |
dc.contributor.author | Yıldırım, Mehmet | - |
dc.date.accessioned | 2021-12-13T10:19:53Z | - |
dc.date.available | 2021-12-13T10:19:53Z | - |
dc.date.issued | 2019 | - |
dc.identifier.issn | 0925-8388 | - |
dc.identifier.issn | 1873-4669 | - |
dc.identifier.uri | https://doi.org/10.1016/j.jallcom.2019.151784 | - |
dc.identifier.uri | https://hdl.handle.net/20.500.13091/165 | - |
dc.description.abstract | The temporal evolution including size, amount, morphology and distribution of gamma' precipitates in gamma matrix in conjunction with coarsening kinetics and oxidation behavior of a model Ni-15Al alloy aged at 800 degrees C for 1, 4, 16, 64 and 256 h is studied in detail. The microstructure of the investigated samples consists of L1(2)-type ordered gamma' (Ni3Al) precipitates and a disordered Ni-rich gamma (FCC) matrix phase. Spheroidal-to-cuboidal-to parallelpipedic morphological transition is observed as the mean precipitate radius increases with increasing aging time. The temporal exponent p is calculated as 0.35 which agrees well with the diffusion-controlled LSW theory (p = 0.33) for coarsening of a binary alloy. However, the power law dependence of the number density (N-V) departs from the theoretical predictions which suggests a quasi-stationary coarsening. The cyclic oxidation behavior of as-cast and aged (800 degrees C for 4, 16, 64 and 256 h) Ni-15Al superalloys at 1000 degrees C in laboratory air were investigated in detail. The results showed that 4 and 16 h aged samples exhibited considerably better oxidation resistance compared to as-cast and 64 and 256 h aged samples. The oxide product is identified as NiO by X-ray diffraction (XRD) analyses. Uniform, even and adherent oxide scale formed without any void formation and important scale spallation. (C) 2019 Elsevier B.V. All rights reserved. | en_US |
dc.language.iso | en | en_US |
dc.publisher | ELSEVIER SCIENCE SA | en_US |
dc.relation.ispartof | JOURNAL OF ALLOYS AND COMPOUNDS | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Ni-Based Superalloys | en_US |
dc.subject | Coarsening | en_US |
dc.subject | Temporal Evolution | en_US |
dc.subject | Cyclic Oxidation | en_US |
dc.subject | Ni-Based Superalloys | en_US |
dc.subject | Cr-Al Superalloy | en_US |
dc.subject | Feal Intermetallics | en_US |
dc.subject | Alloying Elements | en_US |
dc.subject | Cyclic Oxidation | en_US |
dc.subject | Rhenium Addition | en_US |
dc.subject | Kinetics | en_US |
dc.subject | Gamma | en_US |
dc.subject | Microstructure | en_US |
dc.subject | Chemistry | en_US |
dc.title | Temporal evolution, coarsening behavior and oxidation resistance of Ni-15Al superalloy | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1016/j.jallcom.2019.151784 | - |
dc.identifier.scopus | 2-s2.0-85070675853 | en_US |
dc.department | Fakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü | en_US |
dc.authorid | ATAS, Mehmet Sahin/0000-0001-8361-5913 | - |
dc.authorwosid | ATAS, Mehmet Sahin/T-6503-2017 | - |
dc.identifier.volume | 809 | en_US |
dc.identifier.wos | WOS:000483698900067 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
dc.authorscopusid | 57210426052 | - |
dc.authorscopusid | 56640743700 | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.openairetype | Article | - |
item.grantfulltext | embargo_20300101 | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.author.dept | 02.11. Department of Metallurgical and Materials Engineering | - |
crisitem.author.dept | 02.11. Department of Metallurgical and Materials Engineering | - |
Appears in Collections: | Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections |
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1-s2.0-S0925838819330178-main.pdf Until 2030-01-01 | 3.17 MB | Adobe PDF | View/Open Request a copy |
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