太原理工大学,太原理工大学,太原理工大学,太原理工大学,内蒙古工业大学,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)
School of Materials Science and Engineering,Taiyuan University of Technology,School of Materials Science and Engineering,Taiyuan University of Technology,School of Materials Science and Engineering,Taiyuan University of Technology,School of Materials Science and Engineering,Taiyuan University of Technology,Inner Mongolia University of Technology,School of Materials Science and Engineering,Harbin Institute of technology
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通过真空非自耗熔炼工艺制备了不同SiCp添加量(0wt.%、0.1wt.%、0.4wt.%、1.wt.%)的近β钛合金。采用X射线衍射仪(XRD)、扫描电镜(SEM)、维氏显微硬度计和万能材料试验机，系统研究了SiCp添加量对近β钛合金显微组织及力学性能的影响规律。研究结果表明，不同SiCp添加量的近β钛合金主要由α-Ti、β-Ti和TiC所组成。近β钛合金的初生β晶粒尺寸取决于SiCp的添加量，SiCp添加量由0%增加到1wt.%时，近β钛合金初生β晶粒尺寸由639μm降低至323μm。由于受细晶强化、TiC承载强化以及Si的固溶强化的影响，随着SiCp添加量的增加，近β钛合金的显微硬度、压缩强度有显著提高，而压缩率却明显降低。
In this paper, a near beta titanium alloys reinforced with different weight fraction of SiCp were prepared by vacuum induction melting technology.The addition of SiCp was 0wt.%,0.1 wt.%,0.4wt.%,1.0wt.% respectively. Effect of SiCp addition on microstructure and mechanical properties of near beta titanium alloys was systematically investigated by XRD,SEM ,Vicker’s micro- hardness tester and Instron universal testing machine.The XRD patterns of the composite materials were α-Ti,β-Ti and TiC phase.The addition of SiCp refined prior β grain size obviously and the grain size in the alloy decreased from 639 to 323 μm with the addition of SiCp range from 0 to 1wt.%.Moreover, the Vicker hardness and compression strength were higher but worse plasticity compared with unreinforced titanium alloy. These composites utilize the strengthening effects of both particulate reinforcements of TiC and Si elements through solid solution hardening, fine grain hardening.
引用本文
张长江,林思波,张树志,侯赵平,杜赵新,陈玉勇. SiC含量对近β钛合金显微组织及力学性能的影响[J].稀有金属材料与工程,2017,46(5):1271~1276.[Zhang Changjiang, Lin Sibo, Zhang Shuzhi, Hou Zhaoping, Du Zhaoxin, Chen Yuyong. Effect of SiC Contend on Microstructure and Mechanical Properties of Beta Titanium Alloy[J]. Rare Metal Materials and Engineering,2017,46(5):1271~1276.]
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- 收稿日期:2016-01-25
- 最后修改日期:2016-03-26
- 录用日期:2016-04-27
- 在线发布日期: 2017-09-27