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Title: Influence of annealing temperature on sensitisation behaviour and corrosion properties of an Al‐6.8 wt% Mg alloy

Abstract

Influence of annealing temperature on β‐(Al 3 Mg 2 ) phase precipitation and corrosion properties of sensitised Al‐6.8 wt% Mg alloy is investigated. Sensitisation of specimens annealed at 320 °C results in IGC and SCC susceptibility. Microstructural characterization shows fine precipitation of Mg‐rich phase forming nearly continuous film at grain boundaries, despite small precipitated fraction (0.5%), and grain boundary faceting. Sensitised specimens annealed at 265 °C are IGC susceptible, but SCC resistant. Precipitation at grain boundaries is discrete, although the precipitated fraction is greater (3%) than in specimens annealed at 320 °C. Potentiodynamic measurements show that of all measured parameters, charge density is in the strongest correlation with the NAMLT and SSRT results.

Authors:
 [1];  [1];  [2];  [1]
  1. Department of Metallurgical Engineering, Faculty of Technology and Metallurgy University of Belgrade Karnegijeva 4, POB 35‐03 11 120 Belgrade Serbia
  2. ICTM‐Department of Electrochemistry University of Belgrade Njegoševa 12 11 120 Belgrade Serbia
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1400539
Grant/Contract Number:  
DE‐AC02‐05CH11231
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Materials and Corrosion
Additional Journal Information:
Journal Name: Materials and Corrosion Journal Volume: 67 Journal Issue: 8; Journal ID: ISSN 0947-5117
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Radetić, T., Popović, M., Jegdić, B., and Romhanji, E. Influence of annealing temperature on sensitisation behaviour and corrosion properties of an Al‐6.8 wt% Mg alloy. Germany: N. p., 2016. Web. doi:10.1002/maco.201508709.
Radetić, T., Popović, M., Jegdić, B., & Romhanji, E. Influence of annealing temperature on sensitisation behaviour and corrosion properties of an Al‐6.8 wt% Mg alloy. Germany. https://doi.org/10.1002/maco.201508709
Radetić, T., Popović, M., Jegdić, B., and Romhanji, E. Fri . "Influence of annealing temperature on sensitisation behaviour and corrosion properties of an Al‐6.8 wt% Mg alloy". Germany. https://doi.org/10.1002/maco.201508709.
@article{osti_1400539,
title = {Influence of annealing temperature on sensitisation behaviour and corrosion properties of an Al‐6.8 wt% Mg alloy},
author = {Radetić, T. and Popović, M. and Jegdić, B. and Romhanji, E.},
abstractNote = {Influence of annealing temperature on β‐(Al 3 Mg 2 ) phase precipitation and corrosion properties of sensitised Al‐6.8 wt% Mg alloy is investigated. Sensitisation of specimens annealed at 320 °C results in IGC and SCC susceptibility. Microstructural characterization shows fine precipitation of Mg‐rich phase forming nearly continuous film at grain boundaries, despite small precipitated fraction (0.5%), and grain boundary faceting. Sensitised specimens annealed at 265 °C are IGC susceptible, but SCC resistant. Precipitation at grain boundaries is discrete, although the precipitated fraction is greater (3%) than in specimens annealed at 320 °C. Potentiodynamic measurements show that of all measured parameters, charge density is in the strongest correlation with the NAMLT and SSRT results.},
doi = {10.1002/maco.201508709},
journal = {Materials and Corrosion},
number = 8,
volume = 67,
place = {Germany},
year = {Fri Jan 22 00:00:00 EST 2016},
month = {Fri Jan 22 00:00:00 EST 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1002/maco.201508709

Citation Metrics:
Cited by: 4 works
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