Magnitude of Hardening
Estimate magnitude of hardening in Al-4% Cu
Assume for Al that G=28GPa, c=0.04, ?=0.1, b=0.28nm.
Solid Solution Hardening
- Mott and Nabarro expression, ?yield=G?2c where ? is the linear misfit strain of solvent and solute atoms
- ?yield~11MPa
- Only slightly greater than the yield stress of a pure, large grained solid