原位自生(TiB+La2O3)/TC4钛基复合材料的显微组织和力学性能
Microstructure and Mechanical Properties of In-situ Synthesized (TiB+La2O3)/TC4 Titanium Matrix Composite
摘 要
利用钛与镧、硼单质之间的原位反应,经真空自耗电弧熔炼与后续的热加工工艺制备了增强体含量不同的(TiB+La2O3)/TC4钛基复合材料,并研究了它的显微组织和室温拉伸性能.结果表明:该复合材料的基体为网篮状组织,增强体分布均匀,其中TiB呈短纤维状并沿加工方向分布,La2O3呈短棒状或颗粒状;与基体TC4合金相比,复合材料的室温抗拉强度均有所提高,且随着TiB与La2O3增强体含量的增多而增大,增强体起到了较好的增强作用;复合材料的拉伸断裂方式均为韧性断裂.
增强体
TiB
La2O3
力学性能
titanium matrix composite
reinforcement
TiB
La2O3
mechanical property
Abstract
In-situ synthesized (TiB+La2O3)/TC4 composites with different reinforcements contents were produced by vacuum consumable arc melting and heat treatment utilizing the reactions between Ti,B and La,and the microstructure and mechanical properties of the composite were studied.The results show that the basketweave structure and dispersed reinforcements were obtained in the composites,the short fibrous TiB reinforcement distributed along processing direction and the La2O3 reinforcement was in short-rob like and granulated state.Compared with TC4 alloy,the room temperature tensile strength of the composites increased with the increase of TiB and La2O3 reinforcement contents and the renforcements had good potentiation to the substrate.The fracture mechanism of the composites was ductile rupture.
中图分类号 TG146.2
所属栏目 材料性能及其应用
基金项目 国家重点基础研究发展计划资助项目(2012CB619600);国家自然科学基金资助项目(51371114);上海市科委学术带头人项目(12XD1402800);上海航天技术研究院-上海交大航天先进技术联合研究中心资助项目(USCAST2012-14);中国博士后基金资助项目(2014M550235);上海市博士后基金资助项目(14R21410900)
收稿日期 2013/10/17
修改稿日期 2014/8/15
网络出版日期
作者单位点击查看
备注邝玮(1989-),男,江西赣州人,硕士研究生.
引用该论文: KUANG Wei,WANG Min-min,LI Jiu-xiao,HAN Yuan-fei,HUANG Guang-fa,Lv Wei-jie,ZHANG Di. Microstructure and Mechanical Properties of In-situ Synthesized (TiB+La2O3)/TC4 Titanium Matrix Composite[J]. Materials for mechancial engineering, 2015, 39(2): 67～72
邝玮,王敏敏,李九霄,韩远飞,黄光法,吕维洁,张荻. 原位自生(TiB+La2O3)/TC4钛基复合材料的显微组织和力学性能[J]. 机械工程材料, 2015, 39(2): 67～72
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