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SiC含量對近β鈦合金顯微組織及力學性能的影響
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太原理工大學,太原理工大學,太原理工大學,太原理工大學,內(nèi)蒙古工業(yè)大學,哈爾濱工業(yè)大學

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國家自然科學基金 (51504163)；北京科技大學新金屬材料國家重點實驗室基金(2014-ZD06)；太原理工大學人才基金資助項目 (tyut-rc201343a)；太原理工大學校青年團隊項目(2013T001-2013T004)


Effect of SiC Contend on Microstructure and Mechanical Properties of Beta Titanium Alloy
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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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    摘要:

    通過真空非自耗熔煉工藝制備了不同SiCp添加量(0wt.%、0.1wt.%、0.4wt.%、1.wt.%)的近β鈦合金。采用X射線衍射儀(XRD)、掃描電鏡(SEM)、維氏顯微硬度計和萬能材料試驗機，系統(tǒng)研究了SiCp添加量對近β鈦合金顯微組織及力學性能的影響規(guī)律。研究結(jié)果表明，不同SiCp添加量的近β鈦合金主要由α-Ti、β-Ti和TiC所組成。近β鈦合金的初生β晶粒尺寸取決于SiCp的添加量，SiCp添加量由0%增加到1wt.%時，近β鈦合金初生β晶粒尺寸由639μm降低至323μm。由于受細晶強化、TiC承載強化以及Si的固溶強化的影響，隨著SiCp添加量的增加，近β鈦合金的顯微硬度、壓縮強度有顯著提高，而壓縮率卻明顯降低。

    Abstract:

    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.

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張長江,林思波,張樹志,侯趙平,杜趙新,陳玉勇. SiC含量對近β鈦合金顯微組織及力學性能的影響[J].稀有金屬材料與工程,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
  • 錄用日期:2016-04-27
  • 在線發(fā)布日期: 2017-09-27
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