A body-centered tetragonal (bet) twin martensite has been found in Co 39Ni33Al28 ferromagnetic shape memory alloy by transmission electron microscope (TEM) observation. The twin lamellae have ∑ = 25 (011̄) twin boundaries and slip system //(011̄). Periodic appearance of the twin lamellae resulted in a modulated structure with a repeat periodicity of 56d011 perpendicular to the twin interface. The twinning mechanism during martensite transformation is discussed briefly.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering