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热挤压对YAl2p/Mg-14Li-3Al复合材料组织和性能的影响

邱相儒 吴国清 潘英才 王刚刚 葛大梁

邱相儒, 吴国清, 潘英才, 等 . 热挤压对YAl2p/Mg-14Li-3Al复合材料组织和性能的影响[J]. 北京航空航天大学学报, 2017, 43(12): 2547-2553. doi: 10.13700/j.bh.1001-5965.2016.0900
引用本文: 邱相儒, 吴国清, 潘英才, 等 . 热挤压对YAl2p/Mg-14Li-3Al复合材料组织和性能的影响[J]. 北京航空航天大学学报, 2017, 43(12): 2547-2553. doi: 10.13700/j.bh.1001-5965.2016.0900
QIU Xiangru, WU Guoqing, PAN Yingcai, et al. Effect of hot extrusion on structure and properties of YAl2p/Mg-14Li-3Al composites[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(12): 2547-2553. doi: 10.13700/j.bh.1001-5965.2016.0900(in Chinese)
Citation: QIU Xiangru, WU Guoqing, PAN Yingcai, et al. Effect of hot extrusion on structure and properties of YAl2p/Mg-14Li-3Al composites[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(12): 2547-2553. doi: 10.13700/j.bh.1001-5965.2016.0900(in Chinese)

热挤压对YAl2p/Mg-14Li-3Al复合材料组织和性能的影响

doi: 10.13700/j.bh.1001-5965.2016.0900
基金项目: 

国家自然科学基金 50901005

航空科学基金 2010ZF51068

详细信息
    作者简介:

    邱相儒 男,硕士研究生。主要研究方向:镁锂基复合材料挤压成型

    吴国清 男,博士,副教授。主要研究方向:轻质合金及复合材料设计与成型技术

    通讯作者:

    吴国清, E-mail: guoqingwu@buaa.edu.cn

  • 中图分类号: TG376.2

Effect of hot extrusion on structure and properties of YAl2p/Mg-14Li-3Al composites

Funds: 

Foundation items: National Natural Science Foundation of China 50901005

Aeronautical Science Foundation of China 2010ZF51068

More Information
  • 摘要:

    利用搅拌铸造法制备出不同体积分数的YAl2p/Mg-14Li-3Al复合材料,然后将其挤压成薄壁管材,通过金相显微镜、扫描电镜和万能试验机等手段研究了热挤压变形对复合材料显微组织及力学性能的影响。结果表明,通过热挤压变形,YAl2p增强体的分散性得到改善,复合材料的显微组织明显细化,力学性能显著提升。其中挤压态体积分数为1%的YAl2p/Mg-14Li-3Al复合材料与铸态相比,抗拉强度和屈服强度均提高了60%以上,塑性得到改善。在挤压的过程中,复合材料的挤压力峰值与Mg-14Li-3Al合金相比略有增加,且挤压力峰值达到的时间存在滞后的现象。

     

  • 图 1  YAl2p/Mg-14Li-3Al复合材料拉伸试样尺寸

    Figure 1.  Geometry of tensile specimens of YAl2p/ Mg-14Li-3Al composites

    图 2  Mg-14Li-3Al合金与体积分数为1%的YAl2p/ Mg-14Li-3Al复合材料的挤压力-时间关系

    Figure 2.  Relationships between extrusion pressure and extrusion time of Mg-14Li-3Al alloy and YAl2p/ Mg-14Li-3Al composite with volume fraction of 1%

    图 3  铸态与挤压态体积分数为1%的YAl2p/ Mg-14Li-3Al复合材料的SEM照片

    Figure 3.  SEM photographs of as-cast and as-extruded YAl2p/ Mg-14Li-3Al composites with volume fraction of 1%

    图 4  铸态与挤压态体积分数为1%的YAl2p/ Mg-14Li-3Al复合材料的金相组织照片

    Figure 4.  Optical micrographs of as-cast and as-extruded YAl2p/ Mg-14Li-3Al composites with volume fraction of 1%

    图 5  铸态与挤压态体积分数为1%的YAl2p/ Mg-14Li-3Al复合材料的XRD谱图

    Figure 5.  XRD patterns of as-cast and as-extruded YAl2p/ Mg-14Li-3Al composites with volume fraction of 1%

    图 6  复合材料平均晶粒尺寸随YAl2p体积分数的变化关系

    Figure 6.  Changing relationship of average grain size of composites with volume fraction of YAl2p

    图 7  不同状态下YAl2p体积分数对复合材料力学性能的影响

    Figure 7.  Effect of volume fraction of YAl2p on mechanical property of composites in different conditions

    图 8  不同状态下复合材料硬度值随YAl2p体积分数的变化关系

    Figure 8.  Changing relationship of hardness of composites with volume fraction of YAl2p in different conditions

    表  1  LA143镁合金的主要化学成分

    Table  1.   Main chemical composition of LA143 magnesium alloy

    元素 Li Al Ca Ce Fe Mn Mg
    质量分数/% 13.6 2.7 0.016 0.019 0.048 0.025 83.292
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-11-29
  • 录用日期:  2017-02-24
  • 刊出日期:  2017-12-20

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