Martensitic transformation of Ti50Ni30Cu20 alloy prepared by powder metallurgy

► Martensitic transformation sequence in Ti50Ni30Cu20 prepared high - energy milling. ► Two transformations (B2-B19, B2-B19') are evidenced after 10 hours of milling. ► B2-B19 transformation is not more observed after 20 hours of milling. ► A longer milling process promotes the formation of the secondary Ti2(NiCu) phase.