CH1012
L1 /
‹#›
L1 /
4
METAL ALLOYS II
eg. Mild Steel <0.2% C ductile cables
Medium Steel 0.2-0.6%
C
tougher girders
Carbon Steel 0.6-1.5% C tough
tools
2) Heterogeneous
alloys - components not dispersed uniformly. eg. pearlite
steel,
phase 1 ferrite, phase 2 cementite Fe3C
phase 1 ferrite, phase 2 cementite Fe3C
3Fe + C D Fe3C DH +ve
steel at 0.8%C is entirely pearlite
steel at 0.8%C is entirely pearlite
3) Intermetallic
compounds- components have discrete compositions (no range).
eg. Ni3Al - jet engines, strong, low r,
Co5Sm - headset audio magnets, high B / g
eg. Ni3Al - jet engines, strong, low r,
Co5Sm - headset audio magnets, high B / g
