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  4. Microstructural Evolution during Isothermal Annealing of a Cold-Rolled Al-Mn-Fe-Si Alloy with Different Microchemistry States
 
conference paper

Microstructural Evolution during Isothermal Annealing of a Cold-Rolled Al-Mn-Fe-Si Alloy with Different Microchemistry States

Huang, Ke  
•
Li, Yan Jun
•
Marthinsen, Knut
2014
Materials Science Forum
14th International Conference on Aluminium Alloys (ICAA)

In this paper, investigation of the softening behaviour of a supersaturated Al-Mn-Fe-Si alloy during annealing after cold rolling has been carried out. Two different homogenization conditions were considered, of which one gives a condition of a large amount of small pre-existing dispersoids, i.e. providing a significant static Zener drag, while the other gives a condition where both concurrent precipitation and dispersoid drag effects are limited. The homogenized samples with different microchemistry states were then cold-rolled to different strains before subsequent annealing at 300 degrees C. The softening and concurrent precipitation behaviours have been monitored by hardness and electrical conductivity measurements respectively, and the microstructural evolution has been characterized by EBSD. It is clearly demonstrated that the actual microchemistry state, i.e. amount of solutes and second-phase particle structures as determined by the homogenization procedure strongly influence the softening behaviour where a fine dispersion of pre-existing dispersoids together with concurrent precipitation slow down the recrystallization kinetics considerably and give a very coarse and elongated grain structure.

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Type
conference paper
DOI
10.4028/www.scientific.net/MSF.794-796.1163
Author(s)
Huang, Ke  
Li, Yan Jun
Marthinsen, Knut
Date Issued

2014

Publisher

TRANS TECH PUBLICATIONS LTD

Published in
Materials Science Forum
ISBN of the book

978-3-03835-120-7

Volume

794-796

Start page

1163

End page

1168

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
IMX  
Event nameEvent placeEvent date
14th International Conference on Aluminium Alloys (ICAA)

Trondheim, NORWAY

JUN 15-19, 2014

Available on Infoscience
March 6, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/112201
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