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添加La、B对钛基复合材料显微组织和力学性能影响规律的研究
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上海交通大学

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国家重点基础研究发展计划(973计划);国家自然科学基金项目(面上项目,重点项目,重大项目);中国博士后科学基金


Effect of La and B Addition on the Microstructure and Mechanical Properties of titanium Matrix Composite
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ShanghaiJiao Tong University

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National Natural Science Foundation of China (51071122, 51271147, 51201134, 51201133)

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    摘要:

    本研究通过添加不同含量(0.36, 0.72, 1.45wt. %)的镧(La)和不同含量 (0.17, 0.34, 0.68wt. %)的硼(B)到Ti6Al4V基体合金中,经过普通的真空自耗电弧熔炼和热锻技术成功制备了TiB La2O3颗粒增强钛基复合材料,并对材料热处理后的显微组织和力学性能进行了分析。利用XRD对试样进行了物相分析,应用金相显微镜和扫描电镜对复合材料显微组织进行了观察,特别探讨了增强体的演变特征,测定了材料的室温力学性能和高温力学性能。结果表明,La、B的添加对复合材料的显微组织和力学性能的影响巨大,制备的复合材料表现出优异的力学性能,抗拉强度可提高148MPa,能显著地强化基体合金。

    Abstract:

    The Ti6Al4V titanium matrix composite added with (0.36, 0.72, 1.45wt. %) La and (0.17, 0.34, 0.68wt. %) B, were successfully synthesized using common casting and hot forging technology. The microstructural characteristic and tensile properties of the heat-treated materials were investigated, with purticular emphasis on the effect of trace reinforcements. The phase analysis was identified by XRD. Optical microscopy (OM) and scanning electron microscopy (SEM) were used to observe the microstructure. Both room temperature and high temperature tensile properties were tested. The results showed that the addition of La and B plays an important role in the microstructure and mechanical properties of titanium matrix composite, tensile strength can be increased 148MPa, which can strengthen the matrix metal seriously.

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韩远飞.添加La、B对钛基复合材料显微组织和力学性能影响规律的研究[J].稀有金属材料与工程,2016,45(12):3104~3107.[hanyuanfei. Effect of La and B Addition on the Microstructure and Mechanical Properties of titanium Matrix Composite[J]. Rare Metal Materials and Engineering,2016,45(12):3104~3107.]
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  • 收稿日期:2014-09-08
  • 最后修改日期:2014-10-05
  • 录用日期:2014-12-03
  • 在线发布日期: 2017-02-06
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