Phase Investigation of Nitinol SMA According to Melting Method

Control of Ni-Ti Phase Structure, Solid-State Transformation Temperatures and Enthalpies Via Control of L-Pbf Process Parameters

“…Comparatively, most of the B19 0 peaks were stronger and wider in the case of V2. Some of the minor obscure peaks may indicate the presence of secondary phases such as NiTi 2 and Ni 3 Ti [49]. The presence of R-phases and precipitates or secondary phases might be caused due to intense thermal stresses generated from the processing conditions.…”

“…The presence of R-phases and precipitates or secondary phases might be caused due to intense thermal stresses generated from the processing conditions. The presence of Ni 4 Ti 3 precipitates often results in a stable R-phase [49]. It has to be noted that the austenitic transformation (heating cycle) is an endothermic process, while the martensitic transforma- tion (cooling cycle) is an exothermic process involving enthalpy changes.…”