Achieving dispersed fine soft Bi particles and grain refinement in a hypermonotectic Al–Bi alloy by severe plastic deformation and annealing. (October 2018)

• Record Type: Journal Article
• Authors: Zha, Min; Yu, Zhi-Yuan; Qian, Feng; Wang, Hui-Yuan; Li, Yan-Jun; Mathiesen, Ragnvald H.; Roven, Hans J.
• Is Part Of: Scripta materialia. Number 155(2018)
• Page Start: 124
• Page End: 128
• Publication Date: 2018-10
• Subjects: ECAP -- Particle dispersion -- Al–Bi alloys -- Microstructure -- Recrystallization; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.06.029
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The present work revealed that equal-channel angular pressing (ECAP) deformation combined with appropriate annealing could represent as an efficient route to modify immiscible as-cast microstructure of a monotectic Al–8Bi alloy by a complete redistribution of immiscible Bi particles and grain refinement of alloy matrix. Especially, we found that the mean size of Bi particles in the 4-pass ECAPed Al–8Bi sample decreases after annealing at 200 °C for 8 h, due to inverse coarsening driven by the reduction of elastic energy and interfacial energy induced by morphology change and spatial distribution of Bi particles. Graphical abstract: Unlabelled Image