metals 1 Flashcards
1
Q
what are the 2 characteristics of metals?
A
hardness and toughness
2
Q
what is the critical crack length?
A
what a crack within the bonds is larger than the CCL, failure will occur
3
Q
what are some advantages of pure metals?
A
ductile, high stiffness and tensile strength, have strong bonds and are non porous
4
Q
what are some disadvantages of pure metals?
A
expensive to produce, reaction chemically in normal atmosphere, high density
5
Q
what is an alloy?
A
a mixture of different metals
6
Q
what is a phase diagram?
A
a graphical representation of the relationship between mixing percentage and heat
7
Q
iron + WHAT= steel
A
up to 2% of carbon
8
Q
iron + WHAT= cast iron
A
2%-5% of carbon
9
Q
iron + >5% carbon = WHAT?
A
cementite
10
Q
draw the iron carbon phase diagram
A
see notes
