The copper content of Guinier-Preston (GP1) zones in Al-1.84 at% Cu alloy

Journal Article · Mon Mar 02 04:00:00 EST 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(97)00342-X· OSTI ID:616403

Karlik, M; Jouffrey, B; Belliot, S ^[1]

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1. Ecole Centrale Paris, Chatenay-Malabry (France)

The (Guinier-Preston) GP1 zones were studied by means of high resolution electron microscopy and contrast simulations. In the <110> zone axis orientation, shearing of a GP1 zone by a dislocation has been observed. Different models of monolayer GP1 zones--containing 100, 80, 60, 50 and 40% Cu (balance of Al)--were used for the multislice simulations. According to the contrast analysis of through focus series of experimental images and other experimental data, the GP1 zones with the composition ranging from 40 to 100% Cu coexist. A simple model of a displacement field around the GP1 zone was used in simulations in order to interpret the atomic column displacement measured on some experimental micrographs.

• OSTI ID: 616403
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 5 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
CHEMICAL COMPOSITION
COPPER ALLOYS
DISLOCATIONS
GRAIN ORIENTATION
GUINIER-PRESTON ZONES
MATHEMATICAL MODELS