. In the 95 wt.% Al- 5 wt.% Si alloy from the given Al-Si phase diagram a) What
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Question
. In the 95 wt.% Al- 5 wt.% Si alloy from the given Al-Si phase diagram
a) What are the liquidus and solidus temperatures?
b) What phase or phases are present at 700oC? What are their compositions? How much of each phase is present?
c) Repeat b) at 600oC.
d) When slow-cooled from 700oC, how much of the primary solid phase is formed at the reaction temperature? What is its composition? How much of it is present in the alloy?
e) Denote the phase reaction at 577oC and indicate what type it is. Give the composition of each phase involved in the reaction.
f) How much of the two phase mixture is formed through the phase reaction given in e)? What is its composition?
g) What are the relative fractions (fractional amounts) of the two phases in the two-phase mixture formed through the reaction in e)?
h) Fragment the microstructure developed in the alloy right after the phase reaction and denote the amounts of each microstructural constituent phase.
i) Repeat b) at 300oC. One of the phases is found in two different microconstituents. Identify it, its location and its composition.
j) Calculate the compositions of phases and phase contents at room temperature in this alloy.
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