Learn · Heat Treatment and Surface Hardening - II
Lecture 32 of 40Week-7:Verification of Avrami equation using experimental data and stereology
Lecture - 32:Linear regression (least squares) method to find the value of n and k in Avrami equation.
Prof. Kallol Mondal and Prof. Sandeep Sangal · IIT Kanpur
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- Heat Treatment and Surface Hardening - II, IIT Kanpur (at NPTEL)
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All the lectures
- Lecture-1:Recap - I
- Lecture-2:Recap - II
- Lecture-3:Recap - III
- Lecture-4:Determination of Phase Diagram (Experimentally) - I
- Lecture-5:Determination of Phase Diagram (Experimentally) - II
- Lecture-6:Determination of Phase Diagram (Thermodynamically)
- Lecture 7:Effect of pressure on phase transformation temperature and concept of equilibrium between condensed and vapor phase
- Lecture -8 : Effect of different parameters on heat treatment and concept of saturation vapor pressure with examples
- Lecture -9 Title: Formation of ideal solid or liquid solution and (G-X) diagrams for ideal solutions (Part-I).
- Lecture-10: G-X diagrams (Part- II) and concept of chemical potential (Micro Sign) from G-X diagrams.
- Lecture-11:Concept of common tangent for equilibrium between two phases
- Lecture-12:Expressions for equilibrium of two phases - I
- Lecture-13:Expressions for equilibrium of two phases - II
- Lecture-14:Expressions for equilibrium of two phases - III
- Lecture-15:Determining nucleation of phases using G-X plot
- lecture-16: ΔG for nucleation and overall transformation, concepts of solid state transformation including precipitation and Quasi-Chemical Model (QCM)
- lecture 17: Introduction to real solutions and expression of ΔHmix based on the Quasi-Chemical Model (QCM)
- lecture-18: Expression for ΔHmix as a function of interaction energy and mole fraction, based on the QCM (Part-I)
- lecture: 19 Expression for ΔHmix as a function of interaction energy and mole fraction, based on the QCM (part-II)
- lecture-20: Graphical representation of ΔGmix, ΔHmix, and -TΔSmix for real solutions and evolution of eutectic phase diagram from the G-X plots
- Lecture 21: Effect of ΔHmix on determination of phase diagrams (same crystal structure)
- Lecture 22: Effect of ΔHmix on determination of phase diagrams contd..
- Lecture 23: Importance of phase diagrams
- Lecture 24: Effect of heat treatment on microstructure evolution in steel -I
- Lecture 25: Effect of heat treatment on microstructure evolution in steel -II
- Lecture-26:Recap of homogeneous and heterogeneous nucleation for solid to solid transformation.
- Lecture-27:Nucleation rate and its dependence on T (temp. of interest), ΔT, ΔG v and ΔG* and, introduction to growth kinetics.
- Lecture-28:Growth kinetics cont.
- Lecture-29:Growth rate variation with undercooling and kinetics of overall phase transformation.
- Lecture-30:Implication of Avrami's equation with example on excel spreadsheet.
- Lecture-31:Experimental verification of Avrami Equation.
- Lecture - 32:Linear regression (least squares) method to find the value of n and k in Avrami equation.
- Lecture - 33:In this lecture, method to determine the goodness of fit has been explained. Procedure to estimate the values of n and k from experimental data have also been discussed.
- Lecture-34:Stereology and quantitative metallography - I
- Lecture-35:Stereology and quantitative metallography - II
- Lecture-36:Grain size measurements methods.
- Lecture-37:Statistical tools for analysis and reporting of obtained data with examples.
- Lecture-38:Evolution of TTT and CCT diagram from f vs. t plots.
- Lecture-39:TTT, CCT continue and hardenability of steel
- Lecture-40:Importance of heat treatment practices in real life (with examples).