Dislocation-precipitate Interactions in Al-Li Binary and Al-Li-Cu Ternary Alloys

摘要: The different hardening mechanisms which may govern the structural strengthening of Al-Li and Al-Li-Cu alloys are analysed at microscopic scale. comparison between various contributions on flow stress points out prominent effect anti phase boundary creation, during shearing δ' precipitates. This is less effective in ternary Orowan by-passing appears earlier when increasing precipitates diameter. difference be explained with decrease matrix stacking fault energy presence copper.