Bala Narasimha, G.Murigendrappa, S.M.2026-02-052021Journal of Materials Research and Technology, 2021, 14, , pp. 1551-155822387854https://doi.org/10.1016/j.jmrt.2021.07.027https://idr.nitk.ac.in/handle/123456789/23095In this study, the effect of addition of manganese to the ternary Cu–Al–Be shape memory alloys on phase stability, phase transformation temperatures, microstructure, morphology and grain size has been investigated. Secondly, the effect of betatization temperatures and time period has been investigated on the phases and properties of Cu–Al–Be–Mn SMAs. Results reveal that the addition of manganese in the alloys with Al ? 11.8 wt.% forms coexistence of ?<inf>1</inf>? and ?<inf>1</inf>? martensites, and manganese ?1 wt.% forms austenite ?<inf>1</inf> (DO<inf>3</inf>). DSC studies exhibit two stage reverse transformation attributes to coexistence of martensites. Increase in manganese decreases the transformation temperatures and increase in betatization temperature and time increases transformation temperatures. Alloying manganese didn't exhibit significant grain refinement and results reduced shape recovery due to the coexistence of martensites. © 2021 The Author(s)Grain refinementGrain size and shapeManganeseManganese alloysMartensiteMartensitic transformationsPhase stabilityShape optimizationShape-memory alloyCu–al–beEffect of additionMemory alloyPhase transformation temperaturePhases transformationPropertyShape-memoryThermalTwo-stage transformationsHeat treatment