Abstract
Binary Al-Li alloys containing 1.5-3.0 wt% Li are hardened by precipitation of the metastable, coherent δ' (Al3Li) phase having an Ll2 type crystal structure. Plastic deformation in these alloys occurs by the shearing of δ' precipitates by glide dislocations, resulting in the formation of planar slip bands and therefore stress concentrations at grain boundaries and slip band intersections. These stress concentrations become potential crack nucleation sites in the early stages of deformation.
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Schedule a callMore From: Proceedings, annual meeting, Electron Microscopy Society of America
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