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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Mechanical Behavior at the Nanoscale VI
Presentation Title Thermal Stability of Nanocrystalline NiYZr Alloys
Author(s) Saurabh Sharma, Kris Darling, Vikrant Beura, Yashaswini Karanth, Kiran Solanki
On-Site Speaker (Planned) Saurabh Sharma
Abstract Scope Thermal stability of nanocrystalline Ni-Y-Zr duplex alloys, wherein both grain boundary segregation (some solid solubility of Zr in Ni) and phase formation (e.g., Ni-Y and Ni-Zr precipitates) occur, was investigated. The initial materials with different compositions were synthesized using ball-milling. The microstructural changes after annealing (up to 1473K) were characterized using X-ray-line-broadening, micro-hardness, ion beam channeling contrast imaging, and transmission electron microscopy. Results demonstrated that the rate of grain growth observed in Ni-Y-Zr ternary alloy at 873K is similar to the growth rate in pure NC-Ni at 373 K. Furthermore, the maximum hardness of 753 HV was obtained for Ni-Y-Zr ternary system at 873 K, approximately 60 HV greater than Ni-Y, Ni-Zr binary alloys, and more than double as compared to pure NC-Ni. Overall, the thermal stability of ternary alloy has been enhanced due to the presence of Y and Zr.
Proceedings Inclusion? Planned:
Keywords Other, Other, Other

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