Useful links for Material Science

Below is a list of online resources.

1.Visit the Teaching and Learning Packages (TLPs) of University of Cambridge under DoITPoMS.
https://www.doitpoms.ac.uk/tlplib/index.php                                                                          Some of the TLPs useful for our course are:
a) Crystallography
b) Introduction to Deformation Processes
c) Introduction to Dislocations
d) Lattice Planes and Miller Indices
e) Introduction to Mechanical Testing
f) Slip in Single Crystals

2. Visit the following site created by Prof Helmut Föll, Kiel University, Germany on Iron, Steel and Swords. He gives useful insights on various material science topics.
https://www.tf.uni-kiel.de/matwis/amat/iss/index.html

3. Visit this site for some good Online tutorials by School of Materials Science and Engineering, UNSW Sydney

http://www.materials.unsw.edu.au/tutorials/online-tutorials

4. For few virtual experiments by Michigan Tech, visit:
http://www.mtu.edu/materials/k12/experiments/

5. Visit http://www.e-student.in/metallurgical-engineering.html

6. Do visit the nptel site for video lectures and web courses:

http://nptel.ac.in/course.php

• Visit the following in Metallurgy and Material Science discipline:
  Video Courses:
  a) Structure of Materials by Dr. Anandh Subramaniam, IIT Kanpur
  b) Principles of Physical Metallurgy by Prof. R.N. Ghosh, IIT Kharagpur
  c) Defects in Materials by Prof. M Sundararaman, IIT, Madras
  d) Phase Diagrams in Materials Science and Engineering by Dr. Krishanu Biswas, IIT Kanpur
  Web Courses:
  a) Introduction to Materials Science and Engineering by Dr. Ranjit Bauri, IIT Madras
• Visit the following in the Mechanical Engineering discipline:
  Video Courses :
  a) Heat Treatment and Surface Hardening, Dr. Kallol Mondal, IIT Kanpur
  b) Materials Science by Prof. S.K. Gupta, IIT Delhi
  Web Courses: 
  a) Materials Science by Prof. Satish V Kailas, IISc Bangalore

 

Clarity on Plastic Deformation in Metals

Before we start the discussion on underlying physical mechanisms responsible for plastic deformation in metals. It is important that we understand a 1-D defect in metals, what the material scientists refer as dislocations. The two limiting cases of dislocations are:

1) Edge dislocation and

2) Screw dislocation.

In reality the dislocation encountered are mix of both therefore rightly referred as “Mixed dislocation”.

The Edge dislocation can be schematically shown in Figure 1:

Figure 1: Edge Dislocation (By Cdang – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=6641475)

Figure 1 shows that in a perfectly ordered crystal there is an incomplete half plane of atoms; this being called the edge defect.

Now one theory to explain the plastic deformation in metals is by “Slip” mode; here they talk about dislocation movement in the Figure 1. This can be better understood by the visualization shown in Figure 2.

Figure 2: Dislocation movement by glide (By Cdang – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=6695062)

The above analogy can be well understood from this video of glide movement where the bonds of the crystal do not shear off all at once.

MOOC at edX!

After a couple of courses at Coursera, I wanted to learn how edX would be different.

There the first course I enrolled at edX was “Linear Algebra-Foundations to Frontiers” offered by Professor Robert van de Geijn, University of Texas at Austin. This course was very unique in a way there were “Programming Assignments” which were to be submitted using ‘Python’.

 

MOOC at iversity!

The first course I enrolled at iversity was “Vehicle Dynamics I” . The instructor for the course was Martin Meywerk, Professor in Automotive Engineering at the Helmut-Schmidt-University in Hamburg, Germany.

Here it was required to use open source applications like OpenOffice Calc unlike the objective type questions (radio buttons or check marks) in most MOOC and then to upload the assignments for assessment.

 

MOOC at Coursera!

The first MOOC I attempted was in the year 2012; the course was host by coursera. The course title was “Calculus One” offered by Ohio State University. It was out of sheer curiosity to know as to how a subject like Calculus can be taught through online mode and also to refresh my Calculus concepts. The course was taught by Jim Fowler, PhD, Professor in Department of Mathematics along with other two instructors (Bart Snapp PhD and Jennifer). At the end of 8 weeks, I could successfully complete the course and I had the satisfaction of achieving what the course claimed it would deliver!