Test 2

Question 1

_______ cooling of austenite results in pearlite

Answer 1

Slow

Question 2

Bainite has __________ particles of cementite

Answer 2

Elongated

Question 3

Adding zinc to copper to form a substitution also solid solution would cause the crystal lattice to be distorted, which would _________ the yield strength

Answer 3

Increase

Question 4

Nonpermanent deformation recovered upon release of a mechanical stress is called _________

Answer 4

Elastic

Question 5

Impose compressive surface stresses will prevent cracks from growing (T or F)

Answer 5

True

Question 6

Cleavage is a ___________ type of brittle fracture

Answer 6

Transgranular

Question 7

In the diagram above, what is the point corresponding to 61.9% wt. Sn called?

Answer 7

Eutectic

Question 8

When two elements are completely miscible into each other, the resulting phase diagram is called?

Answer 8

Isomorphous

Question 9

Which of the following has the highest carbon content?

Answer 9

Hypereutectic steel

Question 10

Can pearlite be a pro-eutectoid phase (Y or N)

Answer 10

No

Question 11

Which curve is most probably for elastomer

Answer 11

Curve with lowest slope. Elastomers typically show a very elastic behavior with low tensile strength

Question 12

Which materials do you expect to fail in brittle fashion?

Answer 12

Two highest slopes. Have a very low % elongation and reaches a high tensile stress before fracturing

Question 13

Which material is toughest and why?

Answer 13

Material with squiggle. Has the largest area beneath the curve

Question 14

Which material is stiffest?

Answer 14

Highest slope. Young’s modulus is greatest on the graph because it has the steepest slope

Question 15

Y, gamma

Answer 15

Austenite

Question 16

Alpha, fish looking a

Answer 16

Ferrite

Question 17

Fe3C

Answer 17

Cementite

Question 18

A + Fe3C

Answer 18

Pearlite

Question 19

Most ductile to least ductile

Answer 19

Most pearlite , bainite, martensite