Lu, J. B.Shi, H.Sedlakova-Ignacova, SilviaEspinoza, R.Kopeček, JaromírŠittner, PetrBártová, BarboraSchryvers, D.2016-03-162016-03-162016-03-16201310.1016/j.jallcom.2013.03.228https://infoscience.epfl.ch/handle/20.500.14299/124976Transmission electron microscopy was performed to investigate the microstructure and precipitates in the annealed Co38Ni33Al29 ferromagnetic shape memory alloy. Apart from the dendritic secondary phase in the austenite matrix, micron-sized (up to 100 μm) fcc-based precipitates with partial γ′ L12 ordering and containing none, one or three {1 1 1}p parallel twin planes were found. The orientation relationship between the precipitates and matrix was found to be Kurdjumov–Sachs. STEM–EDX analysis indicates that twinned and non-twinned precipitates are Co-rich and Al- and Ni-deficient with respect to the matrix and with a lower Co/Al ratio for the latter. The 3D morphologies of precipitates were reconstructed with focused ion beam/scanning electron microscope dual-beam slice-and-view imaging, showing that the single {1 1 1}p plane twinned precipitates have a plate-like shape while the non-twinned precipitates are lath-like and often bent.Ferromagnetic shape memory alloyPrecipitationMicrostructureTEMFIB/SEMtext::journal::journal article::research article