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Flashcards in Test 2 Deck (19)
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1

_______ cooling of austenite results in pearlite

Slow

2

Bainite has __________ particles of cementite

Elongated

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

Increase

4

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

Elastic

5

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

True

6

Cleavage is a ___________ type of brittle fracture

Transgranular

7

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

Eutectic

8

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

Isomorphous

9

Which of the following has the highest carbon content?

Hypereutectic steel

10

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

No

11

Which curve is most probably for elastomer

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

12

Which materials do you expect to fail in brittle fashion?

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

13

Which material is toughest and why?

Material with squiggle. Has the largest area beneath the curve

14

Which material is stiffest?

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

15

Y, gamma

Austenite

16

Alpha, fish looking a

Ferrite

17

Fe3C

Cementite

18

A + Fe3C

Pearlite

19

Most ductile to least ductile

Most pearlite , bainite, martensite