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OALib Journal期刊
ISSN: 2333-9721
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AZ31镁合金板轧制过程中的{10-11}-{10-12}双孪生对板材显微组织、织构、力学性能的影响
DOI: 10.3724/SP.J.1037.2011.00509, PP. 1567-1574
Keywords: AZ31镁合金,轧制,{10-11}-{10-12}双孪晶,显微组织,织构
Abstract:
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{10-11}-{10-12}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{10-11}-{10-12}双孪晶的产生.轧制过程中,{10-11}-{10-12}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.
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