Testing properties of materials - Industrial

Question 1

Tensile strength - Industrial testing - what is found out

Answer 1

ability to be stretched before deforming

Question 2

Tensile strength - Industrial test

Answer 2

a standard test piece into a tensiometer which clamps both ends, one is fixed and the other pulls the piece at a constant rate putting tension on it

Question 3

Toughness testing - Industrial test - what is found out

Answer 3

ability to absorb impact

Question 4

Toughness testing - Industrial test

Answer 4

Izod impact test - a test piece is placed vertically in the vice of the machine and a pendulum is released from a set position and swings to strike the piece, energy absorbed is calculated, more energy absorbed = more tough

Question 5

Hardness testing - Industrial test - what is found out

Answer 5

ability to resist surface wear - abrasion/indenting

Question 6

Hardness testing - Industrial test

Answer 6

Rockwell - a rounded diamond is pushed into the material as a preload where is breaks just the surface of the material, then an additional load is applied, distance between preload and applied load is measured, smaller indent = harder material

Brinell - standard sized steel ball is forced into the material and the diameter of the indent in the surface is measured

Vickers pyramid test - used for very hard materials, uses a square based pyramid which is forced into the material and a microscope is used to
measure the indent

Question 7

Malleability/Ductility - Industrial test - what is found out

Answer 7

materials resistance to compressing/stretching

Question 8

Malleability/Ductility - Industrial test

Question 9

Non-destructive testing - why are they done

Answer 9

they are done to objects that have a likelihood of an internal defect /imperfection which would not be picked up on through other methods, they also do not damage the material

Question 10

Non-destructive testing - examples

Answer 10

ultrasonic, x-ray, electrical conductivity, thermal conductivity