Influence of multi-axial compression pre-treatment on the microstructure evolution and mechanical properties of an Al–Cu–Li alloy during aging
Source abstract
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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Research context
OpenAlex topics: Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties · Microstructure and mechanical properties
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References (45)
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