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首页> 外文期刊>Materials Science and Engineering >Competition behavior of the strengthening effects in as-extruded AZ91 matrix: Influence of pre-existed Mg_(17)Al_(12) phase
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Competition behavior of the strengthening effects in as-extruded AZ91 matrix: Influence of pre-existed Mg_(17)Al_(12) phase

机译：挤压后的AZ91基体中增强效应的竞争行为：预先存在的Mg_（17）Al_（12）相的影响

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摘要

The AZ91 alloy containing ("AC") and without ("AS") Mg_(17)Al_(12) phase were both subject to hot extrusion at 693 K with the extrusion ratio of 16:1. Results showed that the pre-existed Mg_(17)Al_(12) phase in "AC" alloy led to finer grain size and lower intensity of basal plane texture as compared with "AS" alloy. Almost the same YS between "AC" and "AS" alloy indicated that the grain boundary and precipitation strengthening of "AC" alloy was balanced by the texture strengthening and solid solution strengthening of "AS" alloy. Nevertheless, the elongated Mg_(17)Al_(12) phase along extrusion direction in "AC" alloy reduced its ultimate tensile strength as compared with "AS" alloy. Existence of SiCp led to a dispersive and uniform distribution of Mg_(17)Al_(12) phase, which gave a full play on grain boundary and precipitation strengthening in "AC" composite. Unlike "AC" alloy, just the uniform and dispersive Mg_(17)Al_(12) phase in "AC" composite contributed to the higher YS and UTS as compared with "AS" composite.
机译：含有（“ AC”）和没有（“ AS”）Mg_（17）Al_（12）相的AZ91合金都在693 K下以16：1的挤压比进行热挤压。结果表明，与“ AS”合金相比，“ AC”合金中预先存在的Mg_（17）Al_（12）相导致更细的晶粒尺寸和更低的基面织构强度。 “ AC”和“ AS”合金之间几乎相同的YS表明，“ AC”合金的晶界和析出强化通过“ AS”合金的织构强化和固溶强化得以平衡。然而，与“ AS”合金相比，在“ AC”合金中沿挤压方向伸长的Mg_（17）Al_（12）相降低了其极限拉伸强度。 SiCp的存在导致Mg_（17）Al_（12）相的分散均匀分布，充分发挥了“ AC”复合材料的晶界和析出强化作用。与“ AC”合金不同，与“ AS”复合材料相比，“ AC”复合材料中均匀且分散的Mg_（17）Al_（12）相有助于更高的YS和UTS。

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  • 来源
    《Materials Science and Engineering》 |2016年第22期|102-110|共9页
  • 作者

    Cui-ju Wang; Kun-kun Deng; Kai-bo Nie; Shuan-jun Shang; Wei Liang;

  • 作者单位

    Shanxi Key laboratory of advanced magnesium-based materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;

    Shanxi Key laboratory of advanced magnesium-based materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;

    Shanxi Key laboratory of advanced magnesium-based materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;

    Shanxi Key laboratory of advanced magnesium-based materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;

    Shanxi Key laboratory of advanced magnesium-based materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;

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  • 正文语种 eng
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  • 关键词

    AZ91 alloy; Mg_(17)Al_(12) phase; Microstructure; Mechanical property; Strengthening mechanism;

    机译：AZ91合金;Mg_（17）Al_（12）相;微观结构机械性能强化机制;

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