Published February 22, 2006 | Version v1
Journal article Metadata-only

Precipitation and Corrosion Behaviour of Nano-Structured Near-Surface Layers on an AA6111 Aluminium Alloy

Creators

  • 1. Corrosion and Protection Centre, School of Materials, The University of Manchester, Manchester M60 1QD (United Kingdom)
  • 2. Innoval Technology, Beaumont Close, Banbury, Oxon, OX16 1TQ (United Kingdom)
  • 3. Novelis Technology and Management, 8212 Neuhausen (Switzerland)

Description

A nano-structured, near-surface layer has been generated by mechanically grinding an AA6111 alloy. After heat treatment at 180 deg. C for 30 minutes, Q phase particles, ∼20 nm diameter, were precipitated preferentially at grain boundaries within the nano-structured nearsurface layer. No such precipitates were observed in the bulk alloy after this heat treatment. This preferential precipitation results in the near-surface layers having increased corrosion susceptibility than the bulk microstructure, due to the micro-galvanic coupling between the precipitates at grain boundary and the grain matrix. The localized attack is predominately intergranular

Availability note (English)

Available online at http://stacks.iop.org/1742-6596/26/103/jpconf6_26_024.pdf or at the Web site for the Journal of Physics. Conference Series (Online) (ISSN 1742-6596) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/1742-6596/26/103/jpconf6_26_024.pdf;
DOI
10.1088/1742-6596/26/1/024;

Publishing Information

Journal Title
Journal of Physics. Conference Series (Online)
Journal Volume
26
Journal Issue
1
Journal Page Range
p. 103-106
ISSN
1742-6596

Conference

Title
Conference on imaging, analysis and fabrication on the nanoscale
Acronym
EMAG-NANO 2005
Dates
31 Aug - 2 Sep 2005
Place
Leeds (United Kingdom)

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37056063
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ALUMINIUM ALLOYS; CORROSION; COUPLING; GRAIN BOUNDARIES; GRINDING; HEAT TREATMENTS; LAYERS; NANOSTRUCTURES; PRECIPITATION; SURFACES
Descriptors DEC
ALLOYS; CHEMICAL REACTIONS; COMMINUTION; MACHINING; MICROSTRUCTURE; SEPARATION PROCESSES