JMAK Phase Transformation Kinetics Calculator
Solid-State Phase Kinetics: Model isothermal transformation curves, evaluate Avrami exponents ($n$), rate constants ($k$), and half-times ($t_{0.5}$).
JMAK Kinetic Parameters
Avrami Exponent Meaning:
• $n = 4$: 3D continuous nucleation + linear growth
• $n = 3$: 3D site-saturated (grain boundaries)
• $n = 2$: 2D growth (plates/discs) or 1D diffusion
• $n = 1$: 1D needles or cellular impingement
• $n = 4$: 3D continuous nucleation + linear growth
• $n = 3$: 3D site-saturated (grain boundaries)
• $n = 2$: 2D growth (plates/discs) or 1D diffusion
• $n = 1$: 1D needles or cellular impingement
Transformation State & Characteristic Times
Fraction Transformed
-- %
Half-Time ($t_{0.5}$)
-- s
Onset Time ($t_{0.01}$)
-- s
End Time ($t_{0.99}$)
-- s
Kinetic Rate Analysis
• Instantaneous Transformation Rate ($dX/dt$): -- $% / ext{s}$
• Remaining Parent Phase ($1 - X$): -- %
• Half-Time in Minutes: -- min
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