显微组织对医用TC4钛合金U型钉缩口的影响

doi:10.11896/j.issn.1005-023X.2017.013.019

CLDB

2017, Vol. 31

Issue (13): 146-150 https://doi.org/10.11896/j.issn.1005-023X.2017.013.019

生物医用材料

显微组织对医用TC4钛合金U型钉缩口的影响

白鹏飞¹, 闵小华¹, 陶晓杰², 钟功诚², 白树玉², 程从前¹, 赵杰¹

1 大连理工大学材料科学与工程学院,大连 116024;
2 大连盛辉钛业有限公司,大连 116600

Effect of Microstructure on Necking of Medical U-shaped Nail of TC4 Titanium Alloy

BAI Pengfei¹, MIN Xiaohua¹, TAO Xiaojie², ZHONG Gongcheng², BAI Shuyu², CHENG Congqian¹, ZHAO Jie¹

1 School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024;
2 Dalian SUNTEC TITANIUM LTD, Dalian 116600

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摘要通过光学显微镜、维氏硬度、拉伸实验、X射线衍射和电子背散射衍射等方法,对比分析了两种缩口尺寸不同的医用U型钉用TC4钛合金棒材的显微组织和力学性能。基于两种棒材的显微组织和力学性能的差别,探讨了不同棒材加工的U型钉缩口差异的原因。结果表明:两种棒材横截面的显微组织比较均匀,差异不大,而纵截面显微组织的差异比较明显。大缩口棒材纵截面的α相为变形晶粒,小缩口棒材纵截面的β相主要为等轴晶,两种棒材的β相无明显差别。大缩口棒材的维氏硬度和屈服强度都高于小缩口棒材。再结晶程度的不同导致两种棒材的显微组织和力学性能不同,进而引起U型钉缩口的差异。

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关键词: TC4钛合金 U型钉缩口尺寸显微组织力学性能

Abstract: Microstructure and mechanical properties of two medical TC4 titanium alloy bars, which made medical U-shaped nails with different necking size, were studied by optical microscope, Vickers hardness, tensile test, X-ray diffraction (XRD) and electron backscatter diffraction (EBSD). Based on the difference of microstructure and mechanical properties of two TC4 alloy bars, the reason why necking of U-shaped nails didn′t unit had been explored. The results show that microstructure of two TC4 alloy bars are uniform at the cross-section. However, α phase of big necking bar is mainly deformed grain at the longitudinal-section, while the small necking bar is mainly equiaxial grain. In addition, β phase of two bars has no obvious difference. The Vickers hardness and yield strength of big necking bar are higher than that of small necking bar. The different degree of recrystallization of two bars contributes to the different microstructure and mechanical properties,which results in the difference of necking size of U-shaped nails.

Key words: TC4 titanium alloy U-shaped nail necking size microstructure mechanical property

出版日期: 2017-07-10 发布日期: 2018-05-04

ZTFLH:

TG146.2+3

通讯作者: 闵小华:通讯作者,男,1974年生,博士,教授,博士研究生导师,研究方向为高性能和多功能钛合金 E-mail:minxiaohua@dlut.edu.cn

作者简介: 白鹏飞:男,1990年生,硕士研究生,研究方向为生物医用钛合金 E-mail:bpf2014@mail.dlut.edu.cn

引用本文:

白鹏飞, 闵小华, 陶晓杰, 钟功诚, 白树玉, 程从前, 赵杰. 显微组织对医用TC4钛合金U型钉缩口的影响[J]. CLDB, 2017, 31(13): 146-150.
BAI Pengfei, MIN Xiaohua, TAO Xiaojie, ZHONG Gongcheng, BAI Shuyu, CHENG Congqian, ZHAO Jie. Effect of Microstructure on Necking of Medical U-shaped Nail of TC4 Titanium Alloy. Materials Reports, 2017, 31(13): 146-150.

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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.013.019 或 http://www.mater-rep.com/CN/Y2017/V31/I13/146

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