Discontinuity of G.P.(I) zone andθ'-phase in an Al-Cu alloy.

摘要

The present study examined the precipitation behavior in Al-Cualloys, using DSC measurement, TEM and the Vickers hardness tests. At 433K,precipitation hardening was observed in an Al-Cu alloy containing >1.2 at.%Cu. The present study conclusively established the discontinuity of G.P.(1) andtheta " in thermal stability. It is essential to take the copper concentration intoaccount when considering the precipitation behavior in an Al-Cu alloy, since thestability of the precipitates also depends on the solute concentration.Descriptors: Journal Article; Aluminum base alloys; Structural hardening;