Synergistic effect of multimodal γ' precipitates tuned through Ti addition on phase stability and strength of Co-Ni based superalloy

Mazumder, Namrata ; Kumar, Dipanjan ; Singh, Mahander Pratap ; Makineni, Surendra Kumar ; Mukhopadhyay, Nilay Krishna ; Chattopadhyay, Kamanio (2023) Synergistic effect of multimodal γ' precipitates tuned through Ti addition on phase stability and strength of Co-Ni based superalloy Scripta Materialia, 223 . p. 115105. ISSN 13596462

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Official URL: http://doi.org/10.1016/j.scriptamat.2022.115105

Related URL: http://dx.doi.org/10.1016/j.scriptamat.2022.115105

Abstract

The paper explores the role of multimodal γ' distribution in a CoNi-based superalloy on their thermophysical and mechanical properties. Three categories of γ' size distribution as primary, secondary type-1, and secondary type-2 were obtained by varying Ti composition (2, 4, and 6 at.%) in a Co-30Ni-7Al-2Nb (at.%) alloy. The study reveals an anomaly in primary γ' solvus with an increase in Ti composition that influences the microstructure. The anomaly can be related to the interplay between Nb and Ti composition in the γ'. We report a direct correlation among the nature of γ' distribution, its composition, and the yield strength of the alloys at room and high temperatures.

Item Type:Article
Source:Copyright of this article belongs to Elsevier B.V
ID Code:134982
Deposited On:17 Jan 2023 10:06
Last Modified:17 Jan 2023 10:06

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