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Journal of Materials Science
Published in: Journal of Materials Science 16/2020

29-02-2020 | Metals & corrosion

Influence of multi-axial compression pre-treatment on the microstructure evolution and mechanical properties of an Al–Cu–Li alloy during aging

Authors: Qingqing Zhu, Yuan Lu, Xiaochang Xu, Nan Hu

Published in: Journal of Materials Science | Issue 16/2020

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Abstract

The influence of multi-axial compression (MAC) pre-treatment on the microstructure evolutions and mechanical properties of an Al–Cu–Li alloy during aging was investigated by transmission electron microscopy, tensile tests and X-ray diffractometer. The results show that the aging kinetics and strength of the samples processed by MAC pre-treatment are significantly enhanced compared with those treated by the conventional T6 treatment during aging at 160 °C. The precipitation sequence for the T6 treatment is as follows: SSS → G.P. zones + δ′/β′ → θ′ + δ′/β′ → δ′/β′ + θ′ + T1. However, the precipitation sequence during post-MAC aging changes to: SSS → T1 → T1 + θ′. After MAC pre-treatment, the number density of T1 precipitates increases with decreased diameters and the precipitations of θ′ and δ′/β′ are suppressed during the subsequent aging.
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Appendix
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Metadata
Title
Influence of multi-axial compression pre-treatment on the microstructure evolution and mechanical properties of an Al–Cu–Li alloy during aging
Authors
Qingqing Zhu
Yuan Lu
Xiaochang Xu
Nan Hu
Publication date
29-02-2020
Publisher
Springer US
Published in
Journal of Materials Science / Issue 16/2020
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-020-04494-w

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