6 Solid Solutions
6 Solid Solutions
6 Solid Solutions
Heterogeneous Nucleation
When nucleation takes place in a liquid metal with the help of any impurities.
The impurities could be insoluble particles like sand, alloying elements or any foreign
agent deliberately added to initiate nucleation and solidification.
Dendrites
Solidification of Metals
Cooling curve of Pure Metals
Solidification of Metals
Cooling curve of Pure Metals (Undercooling / Supercooling)
Solidification of Metals
Cooling curve of Alloys
Grain Structure
Factors affecting grain structure
a) Pouring temperature
b) Mass of metal
c) Mould material
d) Thermal conductivity
e) Composition of alloy
• Hall-Petch equation