Describe grain size refinement, solid solution strengthening,
precipiation hardening, and work hardening. Why and when do you use
each of these strengthening processes?
among the four mechanisms of materials strengthening.Which of
these strengthening mechanisms can or can not be used where creep
strength is a major cocern? Why?
An alloy manufacturer is planning to produce 1000 kg of an alloy
with 25% of metal A and 75% of metal B by combining five available
alloys. The quantity available and prices for these alloys is shown
in the following table. Alloy Type 1 Type 2 Type 3 Type 4 Type 5 %A
10 15 20 30 40 %B 90 85 80 70 60 Available quantity, kg 300 400 200
700 450 Price $/kg 6 10 18 24 30 As...
Assume you have a metal alloy - an aluminum alloy for example -
that has been welded and then heat treated in a way that leaves you
uncertain as to the microstructure. Since the component is to be
used for a critical application, you want to be sure of both the
structure and mechanical properties. You want to create a single
phase structure so that you can "start over" with a new heat treat
cycle to more exactly and carefully...