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components
the elements or compounds that are present in an alloy
system
an alloy eg: bronze
vapor → ice
sublimation
binary system
2 component system
in a 2 or more component system you can vary …
pressure, temperature and composition
solubility limit
maximum concentration for which only a single -phase solution exists
isomorphous
complete solubility of one component in another
liquidus line
the line that separates the L and L+alpha phases
soludus line
the line that seperates the alpha and L+ alpha fields
tie line
overall alloy composition connects the phases in equilibrium with eachother
eutectic point
the lowest temperature at which pure liquid will exist
Walpha
=S/ R+S
Wbeta
R/R+S
at temperature in alpha+beta ranges
polycrystalline with alpha grains and beta phase particles
eutectic
liquid transforms to two solid phases
eutectoid
one solid phase transforms to two other solid phases
peritectic
liquid and one solid phase transform to a second solid phase
gibbs phase rule
F+P=C+N
a binary composition-temperature phase diagram for an isomorphous system is composed of regions that contain…
alpha, liquid, alpha+liquid