Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/426557
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dc.date.accessioned2022-12-17T10:23:55Z-
dc.date.available2022-12-17T10:23:55Z-
dc.identifier.urihttp://hdl.handle.net/10603/426557-
dc.description.abstractNi-based superalloys with excellent mechanical, thermal and oxidation resistance properties have great demand in energy applications. Over the time, varied compositions of Ni-based superalloys have been utilized for the fabrication of aero-based and land-based turbines. Recently, these are also proposed as key alloys for construction of Advanced Ultra-supercritical (AUSC) plants. Co has 40 ºC higher melting temperature than Ni, and offers superior sulfidation, hot corrosion and thermal fatigue resistance at elevated temperatures. Recent discoveries suggest that Co-based superalloys having similar microstructure to Ni-based superalloys can be synthesized with base compositions of Co-Al-W or Co-Al-Mo-Nb/Ta. Further developments of these demonstrated that Co-base superalloys can be a promising alternative to Ni-based superalloys. The major challenges with the Co-based superalloys development is to (a) obtain a high and#947;and#697;(L12)-solvus temperature, (b) low mass density, (c) high specific strength at elevated temperatures, (d) long-term microstructural stability (e) better creep properties and (f) optimum oxidation resistance. In the current work, V is investigated as a potential additive in Co-Al based system to produce and#947;and#697;(L12)-strengthened Co-base superalloys. V having complet­­e solid solubility with Mo was systematically replaced in base composition of Co-10Al-5Mo-2Nb alloy, earning benefits in and#947;and#697;-solvus temperature and mass density. A detailed microscopic characterization and microanalysis studies on the developed Co-10Al-5V-2Nb alloy demonstrated the role of V and its interaction with other participating elements in and#947;- and and#947;and#697;- phases. This further guided development of a novel and#947;and#697;-strengthened Co-Al-V ternary system. In a further endeavour, Ni and Ti was added, which led to design a new class of low-density Co-based super alloys. In a parallel effort, oxidation behaviour of the developed Co-Ni-Al-Ti-Nb-V alloy was studied at 800 ºC and 900 ºC...-
dc.format.extentxvi, 130 p.-
dc.languageEnglish-
dc.rightsuniversity-
dc.titleOn understanding the role of V addition in design and development of high specific strength γ L12 strengthened Co base superalloys-
dc.creator.researcherSingh, Mahander Pratap-
dc.subject.keywordEngineering-
dc.subject.keywordEngineering and Technology-
dc.subject.keywordEngineering Multidisciplinary-
dc.contributor.guideChattopadhyay, Kamanio and Basu, Bikramjit-
dc.publisher.placeBangalore-
dc.publisher.universityIndian Institute of Science Bangalore-
dc.publisher.institutionInterdisciplinary Centre for Energy Research-
dc.date.completed2020-
dc.date.awarded2021-
dc.format.dimensions30 cm.-
dc.format.accompanyingmaterialNone-
dc.source.universityUniversity-
dc.type.degreePh.D.-
Appears in Departments:Interdisciplinary Centre for Energy Research

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01_title.pdfAttached File148.64 kBAdobe PDFView/Open
02_prelim pages.pdf650.3 kBAdobe PDFView/Open
03_table of contents.pdf170.97 kBAdobe PDFView/Open
04_abstract.pdf191.94 kBAdobe PDFView/Open
05_chapter 1.pdf154.11 kBAdobe PDFView/Open
06_chapter 2.pdf556.86 kBAdobe PDFView/Open
07_chapter 3.pdf174.45 kBAdobe PDFView/Open
08_chapter 4.pdf2.83 MBAdobe PDFView/Open
09_chapter 5.pdf3.62 MBAdobe PDFView/Open
10_chapter 6.pdf1.55 MBAdobe PDFView/Open
80_recommendation.pdf293.31 kBAdobe PDFView/Open


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