Microstructures
by George Langford, Sc.D., Massachusetts Institute of Technology, Cambridge, MA, 1966
Copyright©
2005 by George Langford
Unknowns - Set 1 - Tenth specimen - 1/8" square by 1/2" long high carbon steel bar
     1 2    3 4        5       6                7
Approximate positions of the seven photomicrographs along the bar. All images are at 1000X with Nital etch.
Position 1 - Roll13-27-fileAt1000X.jpg
This was just a small piece of a file.  See if you can tell what I did to it ... and of course, what microstructural changes have taken place.  Hint: whatever I did, it didn't take very long for me to do it.  And I only did the one thing.  No multi-step shenanigans going on.


Position 1 - very end of bar at far left.

Position 2 - Roll13-28-fileAt1000X.jpg
Position 2 - to the right of Position 1.
Position 3 - Roll13-29-fileAt1000X.jpg
Position 3 -  to the right of Position 2.
Position 4 - Roll13-30-fileAt1000X.jpg
Position 4 - to the right of Position 3.
Position 5 - Roll13-31-fileAt1000X.jpg Position 5 - to the right of Position 4.
Position 6 - Roll13-32-fileAt1000X.jpg
Position 6 - to the right of Position 5.
Position 7 - Roll13-33-fileAt1000X.jpg

Position 7
- to the right of Position 6.



Write out your answer; then go on to the Summary; you will be asked to give a Username ("unknowns") and Password ("himom") which are both different from what you'll need for the Answers ... these are just to keep the spammers away from the email address on the next page ...

The link to the Answer for this specimen is at the bottom of this page as usual.



























Answer: Follow this link.