INTRODUCTION - Lesson 2This set of photomicrographs that I made of this group of specimens in the M.I.T. collection shows a wider range of microstructures and properties than the group in Lesson 1. Whether intentionally or not, the heat treatments did not always produce desirable results. Many of these failures of heat treatment can be modified by repeating or altering the heat treatment. That is why they are of particular interest to physical metallurgists and why an understanding of the kinetics of these phase changes is so important.
|Allow plenty of
time to study and to take good notes about each specimen. About
two hours per lesson would be appropriate. You will be expected
to interpret some of these specimens during the final
examination. Feel free to use the Internet to find additional
information about the alloys and applications mentioned here.
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