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METALS AND ALLOYS 2
- Cf californium metals are: harder, stronger, higher elastic limits
- HARDENING EFFECT:as atoms of differing radii form mechanical resistance to dislocations
- INSOLUBILITY OF METALS
- Consequences: risk of electrolytic corrosion
- Consequences: risk of electrolytic corrosion
- PARTIAL SOLUBILITY OF METALS
- Alloy has different phases:
- Solid solution of metal B in metal A and vice versus
- Alloy has different phases:
- AFFINITY OF METALS
- Form intermetallic compounds
- precise chemical formation : as specific valence (bonds given atom has formed)
- Few crystal imperfections- less potential for slip plane movement
- Hard, brittle, low ductility
- Form intermetallic compounds
- CHARACTERISATION OF METALS AND ALLOYS
- USE OF COOLING CURVES
- Temp vs Time. Tm = melting point
- plateau = temp constant during crystalilisation
- PHASE DIAGRAMS
- Larger the seperation between solidus and liquidus the greater the coring
- Alloy components insoluable in each other
- Larger the seperation between solidus and liquidus the greater the coring
- To make structural and coring predictions
- USE OF COOLING CURVES
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