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Schematically draw the evolution of the microstructure of Fe-C alloy as T decreases from 1000C to 500C, with the following composition (wt % of C)
a) 0.5% of C (hypo eutectoid alloy)
b) 0.76% of C (eutectoid alloy)
c) 1.0% of C (hypereutectoid alloy)
[Hint: refer to the phase diagram in the lecture notes]
How the lubricants reduce the friction and wear characteristics of the parts in contact?
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