Quiz 5

Question 1

What do we get out of a PD?

Answer 1

1) Which phases are present at which temperature/composition combinations
2) Composition of a phase?
3) Weight fraction of each phase?

Question 2

How to determine the phase present in PD?

Answer 2

Locate the temp/concentration combination on the PD and read off the name of the phase field.

Question 3

Single phase region

Answer 3

The composition is the same as the overall alloy composition. Eg L or solid

Question 4

Phase composition in the two phase region

Answer 4

1) Find the composition/temp of interest
2) construct a horizontal line called tie line
3)write the concentrations where the tie line intersects the boundaries.

Question 5

Determination of phase amounts in single phase region

Answer 5

The amount of that phase is 100%

Question 6

What is the Eutectic Composition

Answer 6

The point where liquid is converted straight into solid

Question 7

Primary

Answer 7

Any phase forming above the eutectic temperature

Question 8

Total

Answer 8

The phases below the eutectic temperature

Question 9

α

Answer 9

Is a solid solution mainly element A with a small amount of element B

Question 10

β

Answer 10

Is a solid solution mainly element B with small amounts of element A.