Development of Al-Mg-Si-(Cu) alloys for automotive body panels and the related ageing behaviours

Hao Zhong, Bin Liao, Xiaodong Wu, Lingfei Cao, Paul A. Rometsch

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

Abstract

In this work, Al-Mg-Si-Cu alloys for automotive body panels were designed and the related ageing behaviours were discussed in detail to help understand natural ageing and pre-ageing, as well as their influence on the subsequent paint-bake response. The clustering behavior of these Al-Mg-Si-Cu alloys in different ageing conditions was investigated by hardness/yield strength and electrical conductivity testing. The microstructure was investigated by using Electron Backscattered Diffraction (EBSD) technique, along with Scanning Electron Microscopy with Backscattered Electron Detector (BSE). The results show that the paint bake response is strongly influenced by the pre-ageing and natural ageing conditions. Both alloys show serrated yielding in a short natural ageing condition. Immediate high-temperature pre-ageing treatments were found to give a promising hardening response during the subsequent artificial ageing/ paint baking at 170°C.

Original languageEnglish
Title of host publication9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
Subtitle of host publicationGraz; Austria; 29 May 2016 through 3 June 2016
EditorsC. Sommitsch, M. Ionescu, B. Mishra, E. Kozeschnik, T. Chandra
Place of PublicationSwitzerland
PublisherTrans Tech Publications
Pages279-283
Number of pages5
ISBN (Print)9783035711295
DOIs
Publication statusPublished - 2017
EventInternational Conference on Processing and Manufacturing of Advanced Materials 2016 - Graz, Austria
Duration: 29 May 20163 Jun 2016
Conference number: 9th

Publication series

NameMaterials Science Forum
PublisherTrans Tech Publications Ltd.
Volume879
ISSN (Print)0255-5476

Conference

ConferenceInternational Conference on Processing and Manufacturing of Advanced Materials 2016
Abbreviated titleTHERMEC 2016
CountryAustria
CityGraz
Period29/05/163/06/16

Keywords

  • 3DAP
  • 6xxx alloy
  • Natural ageing
  • Paint bake response
  • Pre-ageing

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