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Erschienen in: Journal of Materials Engineering and Performance 4/2019

28.03.2019

Mechanical Properties and Corrosion Behavior of Spray-Formed 7075 Alloy with One-Stage Aging

verfasst von: Ruiming Su, Tong Liu, Yingdong Qu, Guang Bai, Rongde Li

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 4/2019

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Abstract

The mechanical properties, corrosion resistance and microstructure of the spray-formed 7075 alloy after one-stage aging treatments were studied by using a tensile tester, hardness tester, slow strain rate test, electrical test, intergranular corrosion test, electrochemical corrosion test, scanning electron microscope and transmission electron microscope. The results show that the strength and hardness of the alloy have double peaks with the one-stage aging treatments. With aging at 120 °C for 24 h (first peak), abundant tiny η′ phases and η phases precipitate in the matrix. The tensile strength of the alloy increases to 760 MPa, and the elongation is 4.8%. After aging at 120 °C for 132 h (second peak), blocky η phases appear. The tensile strength and elongation of the alloy are 757 MPa and 5.9%, respectively. The grain boundary precipitates dissociate, and the precipitate-free zones are widened. The corrosion resistance of the alloy increases.

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Metadaten
Titel
Mechanical Properties and Corrosion Behavior of Spray-Formed 7075 Alloy with One-Stage Aging
verfasst von
Ruiming Su
Tong Liu
Yingdong Qu
Guang Bai
Rongde Li
Publikationsdatum
28.03.2019
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 4/2019
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-019-03997-1

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