Phase Transformations
Course Name:
Phase Transformations (MT411)
Programme:
Semester:
Category:
Credits (L-T-P):
Course Outcomes:
CO 1: Importance of phase transformation in metals and alloys to assess the properties
CO 2: Importance of phase transformation in designing of materials
CO 3: To identify the microstructure and phases
Course modules and teaching hours:
Module 1: (08 hours)
Thermodynamic concepts, homogeneous and heterogeneous transformation, nucleation and growth, growth kinetics, Johnson-Mehl and Avrami models
Module 2: (12 hours)
precipitation hardening, modern theories of precipitation hardening, crystallography and morphology of precipitates, typical age hardeningalloys, martensitic transformation, morphological features, crystallographic features, kinetic features, phenomenological theories of martensitic transformation, martensitic transformation in-Tl, Fe-Ni and Fe-C alloys, pearlitic transformation
Module 3: (10 hours)
Order-disorder transformation, short range order, long range order, degree of order, experimental methods to study ordering, dependence of order parameter on temperature, change of property with ordering, recovery, recrystallization and grain growth, secondary recrystallization
Module 4: (06 hours)
Anelasticity and internal friction, thermo-elastic effect, interstitial diffusion, Snoek effect, Kahn's torsionpendulum, relaxationtime, measurement of damping capacity