Role of Grain Refinement Mechanism on Microstructure and Performance in AZ31B Alloy During Interactive Alternating Forward Extrusion (AFE) Process

Yu Wang; Feng Li; Ye Wang; Qiang Chen; Xue Wen Li; Wen Bin Fang

doi:10.1007/s12540-020-00962-9

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자료유형: 학술저널

저자정보: Yu Wang (Harbin University of Science and Technology) Feng Li (Harbin University of Science and Technology) Ye Wang (Harbin University of Science and Technology) Qiang Chen (Southwest Technique and Engineering Institute) Xue Wen Li (Harbin University of Science and Technology) Wen Bin Fang (Harbin University of Science and Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.4

발행연도: 2022.4

수록면: 823 - 832 (10page)

DOI: 10.1007/s12540-020-00962-9

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In this study, interactive alternate forward extrusion (AFE) experiments with varying number of extrusion passes of AZ31magnesium alloy were carried out. The evolution of microstructure, and texture and their effects on the mechanical propertieswere studied. The results show that with the increase of loading passes, the grains are significantly refined, and thedynamic recrystallisation (DRX) structure is uniformly distributed in the product, which is the main reason for the increasein microhardness, compressive strength and failure strain. Further, slip and twinning induced DRX behaviour are consideredto be the main deformation methods in the early stage of deformation. Whereas continuous DRX is considered to be the maindeformation methods for the change in grain morphology in the later stage. During the extrusion process, the deflection angleof the base pole decreases. Finally, the fibre texture is formed; the texture strength is significantly reduced because of theeffect of recrystallisation. The AZ31 magnesium alloy interactive AFE process is discussed with respect to the technologicalexperiment and the microstructure deformation, thus providing a vital scientific basis for further application.

#Magnesium alloy · Alternating forward extrusion (AFE) · Properties · Recrystallisation · Slip · Texture

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