Abstract
The strengthening model by Li and Wawner for Al alloys with {111}α precipitate plates observing the shearing of the omega (AlCu) phase in plastically-deformed samples is demonstrated to be inevitably incorrect. The model was based on the interfaces between dislocations and {111}α precipitate plates of Ω phase in AlCuMgAg alloy using the conventional and high resolution TEM. Since the Ω phase is structurally distinguishable from the phase θ, it is possible that the deformation of the Ω phase will be different from that of the θ phase. Therefore, a discrepancy is evident between the claimed [001](110)Ω slip system and the apparent {001}(100)Ω slip system ignoring the plate-like form and the effect of the aspect ratio for the strengthening.
Original language | English |
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Pages (from-to) | 409-413 |
Number of pages | 5 |
Journal | Scripta Materialia |
Volume | 42 |
Issue number | 4 |
DOIs | |
Publication status | Published - 31 Jan 2000 |