Influence of the Feathery Crystal on the Tensile Behavior of Commercial Pure Aluminum

摘要

The structure and tensile behavior of an abnormal feathery crystal on the AA1N30 commercial pure Al slab cast by semi-continuous direct-chill process was investigated. The result shows that the lamellar feathery crystal has a {111} twin plane and an either or twin axis. Tensile deformation behavior of feathery crystal was strongly dependent on the tensile axis of specimens being parallel or vertical to the twin axis. This kind of anisotropic tensile behavior can be explained based on the difference of the Schmid factor, which was calculated on the relationship of tensile axis and grain orientation.