Test 2. Chapter 9

Question 1

components:?

Answer 1

the elements or compounds which are present in the mixture

Question 2

Phases:?

Answer 2

the physically and chemically distinct material regions that result

Question 3

What information can we get from a phase diagram?

Answer 3

1. # and types of phases
2. amount of different phases in wt%
3. compositions in each phases in wt%
4. Phase evolution with temperature

Question 4

solutions=?

Answer 4

solid solutions, single phase

Question 5

mixtures=?

Answer 5

more than one phase

Question 6

solubility limit?

Answer 6

max concentration for which only a single phase solution occurs

Question 7

temperature and concentration change ____________

Answer 7

number of phases

Question 8

if we know T and C, then we know

Answer 8

the number and type of phases present

Question 9

tie line

Answer 9

connects the phases in equilibrium with each other-essentially and isotherm

Question 10

eutectic

eutectoid

peritectic

Answer 10

connects the phases in equilibrium with each other-essentially and isotherm

solid phase in equation with two solid phases

liquid + solid 1 –> solid 2

Question 11

PHASE DIAGRAM are useful tools to determine:

Answer 11

– the number and types of phases
– the wt% of each phase,
–and the composition of each phase
for a given T and composition of the system

Question 12

Alloying to produce a solid a solution usually………..

Answer 12

• • increasing the tensile strength (TS)

- - decrease the ductility

Question 13

binary ______ and binary ____________ allow for a range of microstructures

Answer 13

eutectics

eutectoids