Microstructures
by George Langford, Sc.D., Massachusetts Institute of Technology, Cambridge, MA, 1966
Copyright©
2005 by George Langford
Unknowns - Set 1 - Fourth specimen - M.I.T.'s #187
Cast iron at 200X etched
This specimen of cast iron, shown in my photomicrograph at left at 200X magnification, shows several extremes in its microstructure.  Identify which microconstituent is especially large, what microconstituent is present in a copious amount, and how many different microconstituents there are.


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