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旋压变形量对B4C增强铝基复合管微观组织及力学性能的影响
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太原理工大学 山西省镁基重点实验室 新材料界面科学与工程省部共建教育部重点实验室 山西 太原

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TG77

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国家自然科学基金资助(项目号51805358、51775366),博士后基金资助(项目号2018M631773)


Influence of spinning deformation on microstructures and tensile properties ofB4C particulate reinforced aluminium matrix composite tube
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Taiyuan University of Technology

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    摘要:

    本文采用等离子放电烧结+异步错距旋压方法制备了不同旋压变形量的B4C颗粒含量为10wt.%的铝基复合材料管材,研究了变形量对复合管材微观组织和力学性能的影响。 研究结果表明:随着旋压变形量的增加,B4C铝基复合管材内部B4C颗粒分布由类似网状结构变为均匀分布,B4C颗粒与基体铝合金之间界面形成了冶金结合;等离子放电烧结过程中的颗粒之间的“尖端放电”效应使得颗粒之间的界面处产生局部高温,促进了界面之间的结合,在界面处产生了AlB2和Al3BC金属间化合物;旋压变形量的增加,细化了铝合金的晶粒尺寸,减小了B4C的颗粒尺寸,但旋压过程中导致的大尺寸B4C颗粒的断裂弱化了细晶强化和颗粒强化对抗拉强度的作用。

    Abstract:

    In this study,the B4C particles reinforced aluminium matrix composite tube with different deformation was first fabricated by spark plasma sintering (SPS) and followed by asynchronous offset spinning. It was found that the B4C particles distributed change from net to relatively homogeneously in the aluminium matrix with the spun deformation increase. The interface between B4C and aluminium was formatted metallurgical bonding due to the discharge was happened lead to the local high temperature existed during SPS processing and the interface was mainly consisted of AlB2 and Al3BC phase. With the deformation increasing, the aluminium grain and B4C size was decrease. But, large size of B4C particles fracture was decrease the fine-grain and particles strengthening function for the tensile strengthening.

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陈洪胜,王文先,聂慧慧,张鹏,刘润爱,杨涛,张媛琦.旋压变形量对B4C增强铝基复合管微观组织及力学性能的影响[J].稀有金属材料与工程,2019,48(9):2923~2929.[chenhongsheng, Wangwenxian, niehuihui, zhangpeng, liurunai, Yang Tao, Zhang Yuanqi. Influence of spinning deformation on microstructures and tensile properties ofB4C particulate reinforced aluminium matrix composite tube[J]. Rare Metal Materials and Engineering,2019,48(9):2923~2929.]
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  • 收稿日期:2018-11-11
  • 最后修改日期:2018-12-27
  • 录用日期:2019-02-21
  • 在线发布日期: 2019-10-09
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