Chapter 4)Design and manufacture

Question 1

What is the difference between the Brinell and the Vickers destructive testing?

Answer 1

Vickers uses a pyramid punch unlike Brinell which is spherical

Question 2

What is an example of toughness testing?

Answer 2

Holding a material in the vice and hitting it with a hammer, if it bends hen it is not very tough

Question 3

How is magnetic testing done in metals?

Answer 3

The metal is sandwiched in between two magnets
Iron filings are out on top
Where be particles leave a space it indicates any defects in the metal

Question 4

Describe ultrasonic testing

Answer 4

A probe is put on top of the metal

The probe sends blips to the machine any change in these blips indicates a defect

Question 5

What is the difference between destructive and non-destructive testing?

Answer 5

Destructive testing means that the material tested will be physically damaged I.e it will have a hole or dents ion in it

Question 6

What is acid pickling?

Answer 6

Metal is cleaned with sulphuric acid removing any oxides and exposing any cracks on the metals surface