Fig. 4: Kinetics of coupled strain-induced phase transformations and transformation-induced plasticity (TRIP).
From: Resolving puzzles of the phase-transformation-based mechanism of the strong deep-focus earthquake
a, b Shear strain and volume fraction of the high-pressure phase vs. τ/τy, respectively. Dots denote shear stress τmin for initiation of strain-induced phase transformation (PT). Line for the stress-induced PT corresponds to Eq. 5. c Kinetics of olivine → γ-spinel PT for different kinetic parameters A. d, e Shear stress τmin/τy for initiation of strain-induced PT and angle α between the shear-transformation band and direction with maximum shear stress τmax, respectively, vs. kinetic parameter A. Results for chemical reaction γ-spinel → bridgmanite+oxide (magnesiowüstite) are included in a–e with A = 2.3 and ε0 = 0.083. f, g Shear strain and shear strain rate, respectively, required to reach temperatures of 1400 K and 1800 K during transformation time t for parameters for the Punchbowl Fault.
