Tensile & Hardness Testing Flashcards
1
Q
What is a good way of knowing if a material is hard or not compared to another material?
A
Harder material scratches softer material (i.e. a key scratches a table therefore the key is harder than the table)
2
Q
What is aluminium oxide also known as? What is it called when aluminium oxide surrounding aluminium has grown thicker?
A
Sandpaper
Anodised aluminium
3
Q
Why is there no unit for hardness?
A
Because it is comparative
4
Q
What is work hardening?
A
Repeated stress on a material
