Effects of different temper and aging temperature on the precipitation behavior of Al 5xxx alloy

Gaosong Yi, David A. Cullen, Alexander T. Derrick, Yakun Zhu, Michael L. Free

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

Al 5xxx alloys can become sensitized to intergranular corrosion (IGC) and stress corrosion cracking (SCC) because of the precipitation of intergranular β phase (Al3Mg2) when exposed to elevated temperature for sufficient time. In this study, ASTM G67 mass loss tests of Al 5083 H131, H116 and Al 5456 H116 aged at 323 K and 343 K for different times were conducted. The average grain size and grain boundary thickness of the three alloys were obtained from Electron Backscattered Diffraction (EBSD) images, and the classical nucleation theory was used to predict the precipitation behavior. Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray Spectroscopy (EDS) were used to characterize Al 5083 H116 aged at different temperature for different times. Scanning Electron Microscopy (SEM) images of Al 5083 H131 etched for different times were used to evaluate the corrosion behavior of different grain boundaries.

Original languageEnglish
Title of host publicationLight Metals 2015 - At the TMS 2015 Annual Meeting and Exhibition
EditorsMargaret Hyland, Margaret Hyland
PublisherMinerals, Metals and Materials Society
Pages361-365
Number of pages5
ISBN (Electronic)9781119082446
StatePublished - 2015
EventLight Metals 2015 - TMS 2015 Annual Meeting and Exhibition - Orlando, United States
Duration: Mar 15 2015Mar 19 2015

Publication series

NameTMS Light Metals
Volume2015-January
ISSN (Print)0147-0809

Conference

ConferenceLight Metals 2015 - TMS 2015 Annual Meeting and Exhibition
Country/TerritoryUnited States
CityOrlando
Period03/15/1503/19/15

Keywords

  • Al 5xxx alloy
  • EBSD
  • Intergranular precipitates
  • Temper

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