Formation mechanism of curved martensite structures in Cu-based shape memory alloys

The curved martensite structures have been observed in CuZnAl-based shape m emory alloys by both transmission electron microscope and optical microscop e. It was found that the curved martensite structures observed in as-soluti on treated, as-aged and as-trained alloys usually occurred around dislocati on tangles or precipitate, at the plate boundary or grain boundary, and whe n the growing plates collided with each other or alternate mutually.