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摘要：
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利用自主研发的电脉冲轧制设备,对AZ91D镁合金板材进行了电脉冲轧制实验,证明了AZ91D镁合金具有一定的可轧性,并获得了合适的工艺参数。对高能电脉冲和轧制力共同作用下AZ91板材变形量、力学性能及微观组织的变化机理进行了分析,并与常规轧制进行了比较。结果表明,由于电塑性效应的影响,与常规轧制相比,道次累计变形量达到了40%,显微组织变化明显,晶粒明显细化,晶粒和晶界明显拉长,抗拉强度等力学性能有显著提高。
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The experiment on electrostimulated rolling of AZ91D magnesium alloy was carried out through the electrostimulated rolling equipment of independent researched and developed.The experiment confirmed that AZ91D alloy could be rolled under certain conditions and appropriate technological parameters were obtained for electrostimulated rolling to AZ91D magnesium alloy plate.After analyzing the deformation of the plate,the mechanical properties,and the mechanism of microstructure by the interaction of high-energy electrical pulse and the rolling force,the results with those of conventional rolling were compared.The results show that the accumulated deformation of passes reaches to 40%,the microstructure changes significantly,grains are refined obviously,grain and grain boundary are clearly stretched,and mechanical properties,such as tensile strength are significantly improved due to the electroplastic effect.
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基金项目：
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国家973计划资助项目(2007CB613700)
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作者简介：
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参考文献：
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[1]邹喜洋.难加工材料的特性及其应用前景[J].金属热处理,2003,28(4):44-46.
[2]田昊洋,唐国翌,丁飞.高能电脉冲处理对镁合金丝材性能的影响[J].有色金属,2008,60(4):1-4.
[3]Klimov K M,Novikov I I.Using new physics and technologyto advance electrostimulated rolling of metals and alloys[J].Journal of Guangdong Non-ferrous Metals,2005,15(2,3):530-532.
[4]唐国翌,姜雁斌,崔敬泉.电致塑性拉拔及电致塑性处理技术的应用[J].冶金设备,2008,(6):63-66.
[5]Conrad H,Karam N,Mannan S.Effect of electric currentpulses in the recrystallization of copper[J].Scripta Metall,1983,17(3):411.
[6]Di Y,Conrad H.Influence of an electric field in the plasticdeformation of polycrystalline NaCl at elevated temperature[J],Acta Mater,1998,46(6):1963-1968.
[7]Wei-di C,Sprecher A F,Conrad H.Effect of strain rate onthe electroplastic effect in Nb[J].Scripta Metall,1989,23(1):151-155.
[8]Sprecher A F,Mannan S L,Conrad H.On the temperaturerise associated with the electroplastic effect in titanium[J].Scripta Metall,1983,17(6):769-772.
[9]Troitskii O A.Pressure shaping by the application of a highenergy[J].Mater.Sci.Eng.,1985,(75):37-50.
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