Toughness

Question 1

What is toughness?

Answer 1

Ability of a metal to absorb energy before fracturing

Question 2

The amount of deformation that a metal can handle before fracture is _________. The force that is required to cause a fracture in the material is the material _______________.

Answer 2

Ductility, strength

Question 3

What kind of surface fractures are usually exhibited in material that have high toughness?

Answer 3

High toughness materials typically exhibit a significant amount of plastic deformation.

Question 4

What kind of surface fractures are usually exhibited in material that have low toughness?

Answer 4

Low toughness materials typically exhibit surface fractures that show little or no plastic deformation.

Question 5

What factors affect material toughness?

Answer 5

1) Temperature
2) Stress conditions
3) Stress concentration
4) Environment
5) Heat treatment/ condition
6) Velocity of loading

Question 6

What is transition temperature?

Answer 6

A small range of temperature at which a very large drop of energy for a fracture to occur happens

Question 7

What are some ways to determine Transition Temperature?

Answer 7

1) FATT: Fracture Appearance Transition Temperature
2) ECTT: Energy Criteria Transition Temperature

Question 8

Carbon _________ transition temperature.

Answer 8

Increases

Question 9

Manganese _________ transition temperature for low Carbon steels

Answer 9

Decreases

Question 10

Notch toughness is a relative property influenced by the _______________ ___________ of the alloy

Answer 10

Chemical composition