Published June 2009 | Version v1
Journal article Metadata-only

Influence of equal-channel angular pressing on precipitation in an Al-Zn-Mg-Cu alloy

Creators

  • 1. Australian Key Centre for Microscopy and Microanalysis, University of Sydney, NSW 2006 (Australia)
  • 2. ARC Centre of Excellence for Design in Light Metals, University of Sydney, NSW 2006 (Australia)
  • 3. School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW 2006 (Australia)
  • 4. Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453 (United States)
  • 5. Materials Research Group, School of Engineering Sciences, University of Southampton, Southampton SO17 1BJ (United Kingdom)

Description

Processing by equal-channel angular pressing (ECAP) affects the morphology of η precipitates in an Al-Zn-Mg-Cu (Al-7136) alloy. It is shown by transmission electron microscopy that ECAP changes the orientation of precipitates and this influences the atomic configuration and the interfacial energy at the η/α-Al interfaces. Consequently, η precipitates adopt an isotropic growth mode and evolve into equiaxed particles. A three-dimensional atom probe analysis demonstrates that large η precipitates formed in different numbers of ECAP passes are of similar composition. The coalescence of smaller precipitates, rather than the fragmentation of larger precipitates, dominates the precipitate evolution.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.actamat.2009.03.017

Additional details

Identifiers

DOI
10.1016/j.actamat.2009.03.017;
PII
S1359-6454(09)00167-0;

Publishing Information

Journal Title
Acta Materialia
Journal Volume
57
Journal Issue
10
Journal Page Range
p. 3123-3132
ISSN
1359-6454
CODEN
ACMAFD

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43038855
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM ALLOYS; ATOMS; COALESCENCE; CONFIGURATION; EVOLUTION; FRAGMENTATION; INTERFACES; MORPHOLOGY; ORIENTATION; PARTICLES; PRECIPITATION; PRESSING; PROBES; THREE-DIMENSIONAL CALCULATIONS; TRANSMISSION ELECTRON MICROSCOPY
Descriptors DEC
ALLOYS; ELECTRON MICROSCOPY; FABRICATION; MATERIALS WORKING; MICROSCOPY; SEPARATION PROCESSES

Optional Information

Copyright
Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.