Mats Quiz#4

Question 1

Is the following statement true or false? During grain growth, larger grains consume smaller ones.

Answer 1

true

Question 2

Is the following statement true or false? Grain growth is driven by reduction in grain boundary area.

Answer 2

True

Question 3

Is the following statement true or false? Recovery and recrystallization are required for grain growth

Answer 3

False

Question 4

Is the following statement true or false? Recrystallization result in formation of equiaxed grains

Answer 4

True

Question 5

Is the following statement correct?
Processes conducted above 0.5 Tm (melting temperature in K) are considered as hot working

Answer 5

incorrect

Question 6

Is the following statement correct? Processes conducted below 0.2 Tm times the melting temperature are considered cold working

Answer 6

incorrect

Question 7

Is the following statement correct? Processes conducted between 0.3 Tm and 0.6 Tm times are considered warm working

Answer 7

correct

Question 8

Is the following statement correct? Processes conducted between 0.2 Tm and 0.6 Tm times are considered warm working

Answer 8

incorrect

Question 9

Is Elastic modulus changed during recovery?

Answer 9

No

Question 10

is Dislocation density changed during recovery?

Answer 10

No

Question 11

Is Residual Stresses changed during recovery?

Answer 11

Yes

Question 12

Is Grain size changed during recovery?

Answer 12

No

Question 13

What is the key feature of Recovery

Answer 13

It decreases residual stress

Question 14

What is the key feature of Recrystalization

Answer 14

If tensile strength begins to increase

Question 15

What is the key feature of the Annealing stage?

Answer 15

-Grain sizes begin to grow

Question 16

What manufacturing techniques make use of the cold-working process?

Answer 16

-Drawing
-Rolling
-Forging
-Extrusion
-Deep Drawing