Microstructure, texture and mechanical properties of Y2O3p/ZG21 composites after rolling and subsequent annealing

• Published in: Journal of alloys and compounds Vol. 889; p. 161683
• Main Authors: Li, X.H., Yan, H., Chen, R.S.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 31.12.2021; Elsevier BV
• Subjects: Annealing; Composite materials; Cross rolling; Deformation mechanisms; Edge dislocations; Grain size; Isotropy; Magnesium composites; Mechanical properties; Microstructure; Recrystallization; Rolling; Rolling direction; Shear bands; Texture; Yield strength; Yield stress; Yttrium oxide; Rolling; Mechanical properties; Microstructure; Magnesium composites; Texture
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.161683

•The Y2O3p/ZG21 composites were firstly prepared and subjected to a multi-cross rolling and subsequent annealing.•The microstructure, texture and mechanical properties after rolling and annealing were systematically investigated.•After multi-cross rolling followed by annealing, a circle multi-peaks texture was formed.•The superior strength and ductility were obtained after annealing in Y2O3p/ZG21 composites. The Y2O3p/ZG21 composites were subjected to a multi-cross rolling and subsequent annealing and the microstructure, texture and mechanical properties were investigated. The main phase in composites was (W+ Y2O3p) phase but the grain size changed little after trace addition of Y2O3 micro-particles in ZG21 alloy. After rolling, the deformed microstructure with lots of twins and shear bands and a basal texture with double peaks were obtained. The yield strength showed a strong isotropy along rolling direction (RD) and transverse direction (TD). However, after annealing, the deformed microstructure and basal texture were replaced by the recrystallized microstructure and a circle multi-peaks texture. Compared with the rolling states, the yield strength was anisotropic along RD and TD. The anisotropic properties were attributed to the asynchronous change of R-texture component and T-texture component during annealing. The k values of Hall-Petch relationship along RD and TD were also different due to different deformation mechanisms. What’s more, the annealed Y2O3p/ZG21 composites still showed superior ductility.