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Course11210421940 lectures

Heat Treatment and Surface Hardening - II

Prof. Kallol Mondal and Prof. Sandeep Sangal · IIT Kanpur

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Lectures

Week-1:Recap of phase-I and determination of phase diagram (Experimentally)

  1. Lecture-1:Recap - I Video
  2. Lecture-2:Recap - II Video
  3. Lecture-3:Recap - III Video
  4. Lecture-4:Determination of Phase Diagram (Experimentally) - I Video
  5. Lecture-5:Determination of Phase Diagram (Experimentally) - II Video

Week-2:Determination of phase diagram (thermodynamically), G-X plots, and concept of saturation vapo

  1. Lecture-6:Determination of Phase Diagram (Thermodynamically) Video
  2. Lecture 7:Effect of pressure on phase transformation temperature and concept of equilibrium between condensed and vapor phase Video
  3. Lecture -8 : Effect of different parameters on heat treatment and concept of saturation vapor pressure with examples Video
  4. Lecture -9 Title: Formation of ideal solid or liquid solution and (G-X) diagrams for ideal solutions (Part-I). Video
  5. Lecture-10: G-X diagrams (Part- II) and concept of chemical potential (Micro Sign) from G-X diagrams. Video

Week-3:Concept of common tangent in G-X plot and determination of phase diagram thermodynamically

  1. Lecture-11:Concept of common tangent for equilibrium between two phases Video
  2. Lecture-12:Expressions for equilibrium of two phases - I Video
  3. Lecture-13:Expressions for equilibrium of two phases - II Video
  4. Lecture-14:Expressions for equilibrium of two phases - III Video
  5. Lecture-15:Determining nucleation of phases using G-X plot Video

Week-4: Quasi-Chemical Model (QCM), its assumptions, concepts and expressions of ΔHmix for real sol

  1. lecture-16: ΔG for nucleation and overall transformation, concepts of solid state transformation including precipitation and Quasi-Chemical Model (QCM) Video
  2. lecture 17: Introduction to real solutions and expression of ΔHmix based on the Quasi-Chemical Model (QCM) Video
  3. lecture-18: Expression for ΔHmix as a function of interaction energy and mole fraction, based on the QCM (Part-I) Video
  4. lecture: 19 Expression for ΔHmix as a function of interaction energy and mole fraction, based on the QCM (part-II) Video
  5. lecture-20: Graphical representation of ΔGmix, ΔHmix, and -TΔSmix for real solutions and evolution of eutectic phase diagram from the G-X plots Video

Week-5:Effect of ΔHmix on phase diagrams and effect of heat treatment on microstructure evolution

  1. Lecture 21: Effect of ΔHmix on determination of phase diagrams (same crystal structure) Video
  2. Lecture 22: Effect of ΔHmix on determination of phase diagrams contd.. Video
  3. Lecture 23: Importance of phase diagrams Video
  4. Lecture 24: Effect of heat treatment on microstructure evolution in steel -I Video
  5. Lecture 25: Effect of heat treatment on microstructure evolution in steel -II Video

WEEK-6: Concepts and expression for nucleation and growth kinetics, variation of growth rate with un

  1. Lecture-26:Recap of homogeneous and heterogeneous nucleation for solid to solid transformation. Video
  2. Lecture-27:Nucleation rate and its dependence on T (temp. of interest), ΔT, ΔG v and ΔG* and, introduction to growth kinetics. Video
  3. Lecture-28:Growth kinetics cont. Video
  4. Lecture-29:Growth rate variation with undercooling and kinetics of overall phase transformation. Video
  5. Lecture-30:Implication of Avrami's equation with example on excel spreadsheet. Video

Week-7:Verification of Avrami equation using experimental data and stereology

  1. Lecture-31:Experimental verification of Avrami Equation. Video
  2. Lecture - 32:Linear regression (least squares) method to find the value of n and k in Avrami equation. Video
  3. 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. Video
  4. Lecture-34:Stereology and quantitative metallography - I Video
  5. Lecture-35:Stereology and quantitative metallography - II Video

WEEK-8: Grain size measurement, statistical tool for analysing the data, evolution of TTT and CCT di

  1. Lecture-36:Grain size measurements methods. Video
  2. Lecture-37:Statistical tools for analysis and reporting of obtained data with examples. Video
  3. Lecture-38:Evolution of TTT and CCT diagram from f vs. t plots. Video
  4. Lecture-39:TTT, CCT continue and hardenability of steel Video
  5. Lecture-40:Importance of heat treatment practices in real life (with examples). Video

Syllabus and materials

At NPTEL, as the course publishes them.

Credits and licence

Institution
IIT Kanpur
Department
Mechanical Engineering
Taught by
Prof. Kallol Mondal, Prof. Sandeep Sangal
Level
Undergraduate
Language
English
Subjects
Engineering
Source
NPTEL
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
Attribution
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