Slide 1

Happy New Year

Dr. Vivek Pancholi

Assistant Professor, MMED

Research Interest

High temperature deformation

Superplastic deformation,

Friction stir processing

Crystallographic texture

Other interests

Innovative ideas:

Environmental issues, Safety, Transport, Common problems

Art & Craft

Any trivia about film making

Phase transformation

and

Heat treatment

Course objective:

The objective of this course is to develop understanding of phase transformations in materials.

Understanding of phase transformation is essential in tailoring of the microstructure for getting specific physical properties.

Concepts of thermodynamics and Kinetics will be used to elucidate principles of phase transformations.

Learning objectives

The student will be able to;

Apply thermodynamics principle to understand phase diagrams

Differentiate between different microstructures; deformed, recrystallized, eutectic, diffusionless and so on

Suggest thermal and/or mechanical treatment to get a particular microstructure with the help of phase diagrams and kinetics of the process

Predict microstructure for a given thermal and/or mechanical process

Thermodynamics & Phase diagram Equilibrium, Single component systems, Binary solutions, Equilibrium in heterogeneous systems, binary phase diagram, Kinetics of phase transformation.

Diffusion Atomic mechanism of diffusion, Interstitial diffusion, Substitusional diffusion, Atomic mobility, Tracer diffusion in Binary alloys, High diffusivity paths, Diffusion in multiphase binary systems.

Syllabus

3. Crystal interface & microstructure Interfacial free energy, Solid/vapor interfaces, Boundaries in single phase solids, Interphase interfaces in solids, Interface migration.

4. Solidification Nucleation in pure metals, Growth of a pure solid, Alloy solidification, Solidification of ingots and castings, Solidification of fusion welds, Solidification during quenching from the melt.

4. Diffusional transformation in solids Homogeneous nucleation in solids, Heterogeneous nucleation, Precipitate growth, Overall transformation kinetics TTT diagram, Precipitation in Age-hardening alloys, Precipitation of ferrite from austenite, Cellular precipitation, Eutectoid transformations, Massive transformations Ordering transformations.

5. Diffusionless Transformations - Characteristics of diffusionless transformation, Martensite crystallography, Theory of martensite nucleation, Martensite growth, Pre-martensite phenomena, Tampering of ferrous martensite.

6. Heat treatment

Textbook:

Phase transformations in metals and alloys, III edition, D.A. Porter, K.E. Easterling and M.Y. Sherif, CRC Press, Taylor and Francis Group, 2004.

References:

Phase transformation in materials, A. K. Jena and M. C. Chaturvedi, Prentice Hall, New Jersey, USA, 1992.

Phase transformation in materials, Editor G. Kostoz, Wiley-VCH, Verlag Gmbh, Weinhein FRG, 2001.

Heat treatment principles and technique, T.V. Rajan, V.P. Sharma, A. Sharma, Prentice-Hall of India Pvt.Ltd., N. Delhi

References:

Robert E. Reed-Hill, , Physical Metallurgy Principles, East-West Press, N. Delhi, 1973

Phase transformations, Editor H. I. Aaronson, American Society for metals, Chapman and Hall, London, 1969.

Theory of transformations in metals and alloys An advanced textbook in Physical Metallurgy, J. W. Christian, Pergamon Press, Oxford, London, 1965.

Websites:

Prof. HKDH Bhadeshia, Phase transformations and complex properties research group, U. of Cambridge (www.msm.cam.ac.uk/phase-trans/ )

Department of Materials Sci & Engg., U. Wisconsin Madison ( www. Engr.wisc.edu/msc/course/mse352.html )

Database on websites is not exhaustive, you are encouraged to explore more and bring it to notice of the class.

Websites:

Solid solutions

http://www.msm.cam.ac.uk/doitpoms/tlplib/solid-solutions/index.php

Solidification

http://www.matter.org.uk/solidification/

http://www.msm.cam.ac.uk/doitpoms/tlplib/solidification_alloys/index.php

Good site for lot of stuff

http://www.matter.org.uk/

http://www.msm.cam.ac.uk/doitpoms/tlplib/index.php

Teach yourself phase diagram

http://www-g.eng.cam.ac.uk/mmg/teaching/typd/

http://www.msm.cam.ac.uk/doitpoms/tlplib/phase-diagrams/index.php

http://www.soton.ac.uk/~pasr1/

Microstructures

http://www.georgesbasement.com/Microstructures/Introduction.htm

http://pwatlas.mt.umist.ac.uk/internetmicroscope/index.html

Materials science on CDROM This software is loaded on PCs located in Department Library, Second floor, MMED, contact person Mr. Ram Vir Singh.

Modules relevant to this course are:

Introduction to phase diagrams

Thermodynamics of phase diagrams

Atomic diffusion in metals and alloys

Nucleation in metals and alloys

CWS: 15 PRS: 15MTE: 15ETE: 40PRE: 15

Evaluation scheme:

Assignments - 10

Attendance - 5

Lab reports- 7

Viva-Voce - 8