Controlling Discontinuous Grain Growth in a Heat-Treatable Aluminum Alloy

摘要

Discontinuous grain growth (D.G.G.) or "secondary recrystallization" has caused forming problems for AA2117 alloy rivets. The large grains resulting from D.G.G. cause the rivets to upset non-uniformly when the second rivet head is made. Parameters used to control D.G.G. are composition, initial recrystallized grain size, texture and heat treat conditions.