Analysis of austenite-martensite phase boundary and twinned microstructure in shape memory alloys: The role of twinning disconnections

Geometry of martensite needles in shape memory alloys

“…A phase-field approach, also with a geometrically nonlinear model, has been presented in [14] and also shows bending and tapering of needle-like structures (see in particular Figure 3 there). In [5] the stored elastic energy was numerically minimized with respect to variation in the period of the twinned microstructure. The formation of needles was also observed using a Fourier-space discretization of a viscoelastic model [20].…”