首页|Fabrication of AZ31/Mg3Y Composites with Excellent Strength and Plasticity via Accumulated Rolling Bonding and Diffusion Annealing
Fabrication of AZ31/Mg3Y Composites with Excellent Strength and Plasticity via Accumulated Rolling Bonding and Diffusion Annealing
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AZ31/Mg3Y composites with a layer thickness of 100-200 μm were fabricated by accumulated rolling bonding(ARB),which was followed by diffusion annealing at 300 ℃ for 0-32 h.An interface layer,containing numerous Al-Y precipitates,is formed in the Mg3 Y layer that is adjacent to the interface as a result of Al diffusing from the AZ31 layers into the Mg3 Y layers.The thickness of the interface layer gets increased and more precipitates are formed in the interface layer with the extension of the annealing time.The microhardness of the AZ31 and Mg3 Y layer decreases firstly and then reaches a sta-ble value,while the microhardness of the interface layer increases gradually with the extension of the annealing time.The AZ31/Mg3Y composites exhibit equivalent strength but increased ductility after diffusion annealing,in comparison to the as-rolled AZ31/Mg3Y composite.In addition,the AZ31/Mg3Y composites after annealing always present higher strength and ductility than AZ31/AZ31 composite,which was fabricated by the same process as that for the AZ31/Mg3Y composites.Hetero-deformation induced strengthening also plays an important role in the excellent strength and ductility of the annealed AZ31/Mg3Y composite.This study can provide a direction for improving the plasticity and strength of magnesium alloys synergistically.
AZ31/Mg3Y compositeAccumulated rolling bondingDiffusion annealingPrecipitatesStrengthening
Yang Feng、Wenhuan Chen、Zheng Xu、Weijun He、Bin Jiang、Fusheng Pan
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College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China
International Joint Laboratory for Light Alloys(Ministry of Education),Chongqing University,Chongqing 400044,China
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