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- W3082614691 endingPage "156931" @default.
- W3082614691 startingPage "156931" @default.
- W3082614691 abstract "The post-deformation aging response and underlying precipitation kinetics in ultrafine-grained, age-hardened alloys processed by severe plastic deformation are critical and heretofore poorly understood phenomena that ultimately influence mechanical behavior. In this study, a supersaturated solid solution 7075 Al alloy was processed by equal-channel-angular pressing (ECAP) route Bc at 250 °C for 6 passes to attain ultrafine grained (UFG) structures. Thermal and mechanical analyses revealed that there are three sequential phase transitions that govern post-deformation aging: first, dissolution reactions of Guinier-Preston (GP) zones, metastable ηp and η′ precipitates which correspond to slight decreases in strength and ductility; second, afresh precipitating of GP zones, metastable ηp and η′/stable η phases corresponding to an increase in strength with significant decrease in ductility; and third, subsequent η transformation of the metastable η′ and ηp as well as coarsening of stable η phases corresponding to a dramatic decreases in strength. Microstructural analysis suggests that the significant decrease in ductility may be attributed to grain boundary precipitation of the metastable ηp and η′/stable η phases." @default.
- W3082614691 created "2020-09-08" @default.
- W3082614691 creator A5050857956 @default.
- W3082614691 creator A5063985653 @default.
- W3082614691 creator A5069945770 @default.
- W3082614691 creator A5089218718 @default.
- W3082614691 date "2021-01-01" @default.
- W3082614691 modified "2023-10-13" @default.
- W3082614691 title "Precipitation and aging phenomena in an ultrafine grained Al-Zn alloy by severe plastic deformation" @default.
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- W3082614691 doi "https://doi.org/10.1016/j.jallcom.2020.156931" @default.
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