Please use this identifier to cite or link to this item:
http://hdl.handle.net/10603/426557
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.date.accessioned | 2022-12-17T10:23:55Z | - |
dc.date.available | 2022-12-17T10:23:55Z | - |
dc.identifier.uri | http://hdl.handle.net/10603/426557 | - |
dc.description.abstract | Ni-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.extent | xvi, 130 p. | - |
dc.language | English | - |
dc.rights | university | - |
dc.title | On understanding the role of V addition in design and development of high specific strength γ L12 strengthened Co base superalloys | - |
dc.creator.researcher | Singh, Mahander Pratap | - |
dc.subject.keyword | Engineering | - |
dc.subject.keyword | Engineering and Technology | - |
dc.subject.keyword | Engineering Multidisciplinary | - |
dc.contributor.guide | Chattopadhyay, Kamanio and Basu, Bikramjit | - |
dc.publisher.place | Bangalore | - |
dc.publisher.university | Indian Institute of Science Bangalore | - |
dc.publisher.institution | Interdisciplinary Centre for Energy Research | - |
dc.date.completed | 2020 | - |
dc.date.awarded | 2021 | - |
dc.format.dimensions | 30 cm. | - |
dc.format.accompanyingmaterial | None | - |
dc.source.university | University | - |
dc.type.degree | Ph.D. | - |
Appears in Departments: | Interdisciplinary Centre for Energy Research |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
01_title.pdf | Attached File | 148.64 kB | Adobe PDF | View/Open |
02_prelim pages.pdf | 650.3 kB | Adobe PDF | View/Open | |
03_table of contents.pdf | 170.97 kB | Adobe PDF | View/Open | |
04_abstract.pdf | 191.94 kB | Adobe PDF | View/Open | |
05_chapter 1.pdf | 154.11 kB | Adobe PDF | View/Open | |
06_chapter 2.pdf | 556.86 kB | Adobe PDF | View/Open | |
07_chapter 3.pdf | 174.45 kB | Adobe PDF | View/Open | |
08_chapter 4.pdf | 2.83 MB | Adobe PDF | View/Open | |
09_chapter 5.pdf | 3.62 MB | Adobe PDF | View/Open | |
10_chapter 6.pdf | 1.55 MB | Adobe PDF | View/Open | |
80_recommendation.pdf | 293.31 kB | Adobe PDF | View/Open |
Items in Shodhganga are licensed under Creative Commons Licence Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0).
Altmetric Badge: