On the origin of extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation

Details On the origin of extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation On the origin of extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation

2010-10-22

arxiv.org/abs/1010.4644v1

Scripta Materialia 63 (2010) 949

Physics

Condensed Matter

Materials Science

Scientific paper

10.1016/j.scriptamat.2010.07.014

Ultrafine-grained Al alloys produced by high pressure torsion are found to exhibit a very high strength, considerably exceeding the Hall-Petch predictions for the ultrafine grains. The phenomena can be attributed to the unique combination of ultrafine structure and deformation-induced segregations of solute elements along grain boundaries, which may affect the emission and mobility of intragranular dislocations.

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