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

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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

Published: 04 May 2018

CLC number:

TG146.2+3

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	Articles by authors
	BAI Pengfei
	MIN Xiaohua
	TAO Xiaojie
	ZHONG Gongcheng
	BAI Shuyu
	CHENG Congqian
	ZHAO Jie

Cite this article:

BAI Pengfei,MIN Xiaohua,TAO Xiaojie, et al. Effect of Microstructure on Necking of Medical U-shaped Nail of TC4 Titanium Alloy[J]. Materials Reports, 2017, 31(13): 146-150.

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

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