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研究了在150和300℃温度下采用顺轧、交叉轧2种方式制备的4种AZ31镁合金轧制板材的显微组织、织构和单轴拉伸力学性能.研究表明:{1011}{1012}双孪晶是镁合金板轧制变形过程中的重要变形机制.变形温度的升高会抑制{1011}{1012}双孪晶的产生.轧制过程中,{1011}-{1012}双孪晶的变体选择机制与轧制方向有关,进而对轧制板材的显微组织、织构及力学性能产生不同的影响.低温顺轧将使板材中的双孪晶平行排列,板材的织构各向异性、单轴拉伸塑性各向异性增强;而低温交叉轧将使板材中的孪晶分布杂乱.织构各向异性、单轴拉伸塑性各向异性均较顺轧板材减弱.高温轧制板材中双孪晶较少,板材的织构各向异性和拉伸各向异性均较弱.
The microstructures, textures and uniaxial tensile mechanical properties of four AZ31 magnesium alloy rolled plates prepared by rolling and cross rolling at 150 and 300 ℃ were studied.The results show that {1011} 1012} twinning is an important deformation mechanism in the deformation process of magnesium alloy sheet. The increase of deformation temperature will suppress the generation of {1011} {1012} double twins. {1011} - {1012} Twin twins variation selection mechanism and the rolling direction, and thus the rolling of the microstructure, texture and mechanical properties have a different impact.Short-temperature rolling will make the twins parallel to the plate, the plate The anisotropy of texture and the plastic anisotropy of uniaxial tension are enhanced.When the cold cross-rolling is applied, the twins in the sheet will be disordered.Antivisure anisotropy and uniaxial tensile ductility anisotropy are weaker than the ductile sheet In the high temperature rolled sheet, the twin twins are less and the texture anisotropy and tensile anisotropy of the sheet are weaker.