太原理工大学,太原理工大学,太原理工大学,哈尔滨工业大学,哈尔滨工业大学
国家自然科学基金 (51504163)；北京科技大学新金属材料国家重点实验室基金(2014-ZD06)；太原理工大学人才基金资助项目 (tyut-rc201343a)；太原理工大学校青年团队项目(2013T001-2013T004)
Shanxi Key Laboratory of Advanced Magnesium-Based Materials,Taiyuan University of Technology,Shanxi Key Laboratory of Advanced Magnesium-Based Materials,Taiyuan University of Technology,Shanxi Key Laboratory of Advanced Magnesium-Based Materials,Taiyuan University of Technology,The National Key Laboratory for Precision Hot Forming of Metals,Harbin Institute of technology,The National Key Laboratory for Precision Hot Forming of Metals,Harbin Institute of technology
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通过真空非自耗熔炼工艺制备了不同TiC含量(1,2.5,5,7.5,10,15vol.%)的近α高温钛合金基复合材料。采用X射线衍射仪(XRD)、金相显微镜(OM)、扫描电镜(SEM)和万能材料试验机,系统研究了TiCp含量对近α高温钛合金基复合材料显微组织和力学性能的影响规律。研究结果表明,可以利用Ti与C之间的原位反应制备TiC/Ti复合材料,随着TiC含量的升高,TiC的形态逐渐由长条状向等轴状、枝晶状发展,其不同的形态主要是由其凝固路径决定的。室温压缩性能表明,随着TiC含量的升高,抗压强度和屈服强度明显升高,但达到一定值后强度有不同程度的降低,而压缩率随着TiC含量的升高明显降低。
In this paper, a near-α titanium alloys reinforced with different volume fraction of TiCwere prepared by vacuum induction melting technology. The addition of TiCp was 1, 2.5, 5, 7.5, 10, 15 vol.% respectively. The effect of TiC content on microstructure and mechanical properties of near-α titanium alloys was systematically investigated by XRD, OM, SEM and Instron universal testing machine. The XRD result confirms that in-situ casting process is feasible to fabricate the composite. As TiC content increases, the morphologies of TiC are transformed from long strip-like to equiaxed shape and then to dendritic characteristic, which is closely related to the solidification paths. The addition of TiCpromotes the ultimate compression strength (UCS) and yield strength(YS) of the alloy. However, as the TiC content reaches to a certain degree, the strength decreases in different degree. The increased UCS and YS is accompanied by the rapid decreasing in fracture strain.
引用本文
张长江,林思波,张树志,孔凡涛,陈玉勇. TiC含量对高温钛基复合材料组织与性能的影响[J].稀有金属材料与工程,2017,46(S1):185~189.[Zhang Changjiang, Lin Sibo, Zhang Shuzhi, Kong Fantao, Chen Yuyong. Effect of TiC Contend on Microstructure and Mechanical Properties of High-Temperature Titanium Matrix Composites[J]. Rare Metal Materials and Engineering,2017,46(S1):185~189.]
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- 收稿日期:2016-05-12
- 最后修改日期:2016-05-12
- 录用日期:2017-08-08
- 在线发布日期: 2017-12-13