Stabilizing Effect of (100) Compound Twinning in NiTi Martensite
According to experimental findings, the martensite structure of NiTi is monoclinic (B19'). However, previous first principles calculations have shown that, after a full optimization of the lattice, the ideal martensite structure relaxed into orthorhombic B33 structure. Present calculations reveal that a presence of twins in a real martensite can stabilize the B19' structure.
P. Šesták et al., "Stabilizing Effect of (100) Compound Twinning in NiTi Martensite", Key Engineering Materials, Vol. 465, pp. 81-84, 2011