exam 3 part 2 Flashcards
What is stronger an alloy fully aged at a higher or lower temp?
Lower temp
What is stronger, a as solidified or solutionized, quench, and aged alloy?
solutonized, quenched and aged alloy
An as quenched martensite is always tempered before use to do what?
increase ductility
As percent cold work of metal increased, the yield strength…
increases
As percent cold work of metal increased, the ductility…
decreases
As percent cold work of metal increased, the modulus…
stays the same
True or false. The surface finish of a cold worked metal is better than hot owrked metal.
True
What is the stage of annealing that gives the biggest change in mechanical property
recrystalization
True or false. The ductility decreases during hot work if you start from a cold work structure.
False
True or false. The strength decreases during hot working if you start from a cold worked structure.
True
True or false. The corrosion resistance of a cold worked metal is better than that of hot worked metal.
False
True or false. The electrical conductivity of a cold worked metal is better than that of a hot worked.
False
True or false. The properties of a cold worked metal are isotopic (same direction)
False
What curve has a faster cooling rate and higher undercooling?
Curve A
Which is more likely a heterogeneous or homogeneous nucleation?
heterogenous
