Properties Flashcards
1
Q
define yield stress
A
the stress at which permanent deformation begins
2
Q
define Ultimate Tensile Strength
A
The highest stress resisted by a material, point at which necking starts
3
Q
define Breaking Strength
A
the stress at which a materialfails by fracture
4
Q
define hardness
A
A measure of resistance to plastic deformation
5
Q
How do you measure the hardness of a material
A
Vickers hardness test (HV)
HV = F/A
F = test force
A = surface area created but diamond tip
