Pandey, P and Pantawane, MV and Baler, N and Ravi, R and Makineni, SK and Chattopadhyay, K (2022) Effect of Cr addition on the γ′ strengthened CoNiCrAlMo compositionally complex alloy. In: Materials Science and Technology (United Kingdom) .
Full text not available from this repository.Abstract
The present study illustrates the effect of varying Cr content in Co51-xNi30Al10Mo5Nb2Ti2Cr x (x = 2, 5, and 8 at.-%) compositionally complex alloys (CCAs). STEM-EDS analysis suggests a change in Mo partitioning from equal in both the phases (γ and γ′) in CCA-2Cr to the γ phase in CCA-5Cr and CCA-8Cr alloys. This peculiar compositional partitioning with Cr content beyond 2% brings a change in γ′ precipitate morphology from cuboidal to spheroidal in CCAs. The shape change-induced reduction in strain energy rendered a decrease in γ′ coarsening rate by ∼ 1/2, i.e. from 11.5 to 4.6 nm3/s in the CCA-2Cr and CCA-8Cr alloys, respectively. All three alloys show an anomalous increase in 0.2% proof stress (PS) with temperature and achieve peak values at 770°C.
| Item Type: | Journal Article |
|---|---|
| Publication: | Materials Science and Technology (United Kingdom) |
| Publisher: | Taylor and Francis Ltd. |
| Additional Information: | The copyright for this article belongs to Taylor and Francis Ltd. |
| Keywords: | Aluminum alloys; Coarsening; Cobalt alloys; Molybdenum alloys; Niobium alloys; Ostwald ripening; Strain energy; Titanium alloys, Coarsening kinetics; Complex alloys; Compositionally complex alloy; Cr addition; Cr content; EDS analysis; Partition coefficient; Shape change; Thermodynamics calculations; γ'precipitate morphology, Chromium alloys |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 06 Oct 2022 11:18 |
| Last Modified: | 06 Oct 2022 11:18 |
| URI: | https://eprints.iisc.ac.in/id/eprint/77061 |
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