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.
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.
1 Li Hongmei, Lei Ting, Fang Shuming, et al. Researc h progress of biomedical titanium alloys [J]. Metall Funct Mater,2011,18(2):70 (in Chinese). 李红梅,雷霆,方树铭,等. 生物医用钛合金的研究进展[J]. 金属功能材料,2011,18(2):70. 2 Zhang Wenyu. The research progress of biomedical titanium alloys [J]. Chem Adhesion,2014,36(5):369(in Chinese). 张文毓. 生物医用钛合金的研究进展[J]. 化学与黏合,2014,36(5):369. 3 Kuroda D, Niinomi M, Morinaga M, et al. Design and mechanical properties of new β type titanium alloys for implant materials [J]. Mater Sci Eng A,1998,243(1):244. 4 Hao Yulin, Yang Rui. High strength nano-structured Ti-Nb-Zr-Sn alloy [J]. Acta Metall Sin,2005,41(11):75(in Chinese). 郝玉琳,杨锐. 纳米高强Ti-Nb-Zr-Sn合金[J]. 金属学报,2005,41(11):75. 5 Zhao X L, Niinomi M, Nakai M, et al. Microstructures and mechanical properties of metastable Ti-30Zr-(Cr, Mo) alloys with changeable Young′s modulus for spinal fixation applications [J]. Acta Biomater,2011,7(8):3230. 6 Santosp F, Niinomi M, Cho K, et al. Microstructures, mechanical properties and cytotoxicity of low beta Ti-Mn alloys for biomedical applications [J]. Acta Biomater,2015,26:366. 7 Liu H H, Niinomi M, Nakai M, et al. β-Type titanium alloys for spinal fixation surgery with high Young′s modulus variability and good mechanical properties [J]. Acta Biomater,2015,24:361. 8 Liu H H, Niinomi M, Nakai M, et al. Mechanical properties and cytocompatibility of oxygen-modified β-type Ti-Cr alloys for fixation devices [J]. Acta Biomater,2015,12(1):352. 9 Liu H H, Niinomi M, Nakai M, et al. Athermal and deformation-induced ω-phase transformations in biomedical beta-type alloy Ti-9Cr-0.2O [J]. Acta Mater,2016,106:162. 10 Zheng Kai, Yu Xiuchun, Guo Zheng, et al. The application and development of metal materials in orthopedics [J]. Orthopaedic Biomech Mater Clinical Study,2013,10(2):31(in Chinese). 郑凯,于秀淳,郭征,等. 生物金属材料在骨科的应用及发展[J]. 生物骨科材料与临床研究,2013,10(2):31. 11 《中国组织工程研究与临床康复》学术部.医用金属材料相关产品的应用现状和发展趋势[J]. 中国组织工程研究与临床康复,2010,14(51):9621. 12 Jia Zonghai. The optimum design and mechanical test of the novel cannulated pedicle screw [D]. Jinan: Shandong University,2011(in Chinese). 贾宗海. 新型可灌注椎弓根螺钉的优化设计及力学检测[D]. 济南:山东大学,2011. 13 Griza S, Andrade C E C, Batista W W, et al. Case study of Ti6Al4V pedicle screw failures due to geometric and microstructural aspects [J]. Eng Failure Anal,2012,25:133. 14 Huang Yongguang. Developments of titanium and titanium alloy and standardization for surgical implant [J]. Titanium Ind Prog,2010,27(1):1(in Chinese). 黄永光. 外科植入用钛及钛合金标准发展现状[J]. 钛工业进展,2010,27(1):1. 15 Huang Yamin, Pan Chunxu. Micro-stress-strain analysis in materials based upon EBSD technique: A review [J]. J Chinese Electron Microscope Soc,2010,29(1):662(in Chinese). 黄亚敏,潘春旭. 基于电子背散射衍射(EBSD)技术的材料微区应力应变状态研究综述[J]. 电子显微学报,2010,29(1):662. 16 Choi J Y, Ji J H, Hwang S W, et al. TRIP aided deformation of a near-Ni-free, Mn-N bearing duplex stainless steel [J]. Mater Sci Eng A,2012,535:32. 17 Calcagnotto M, Adachi Y, Ponge D, et al. Deformation and fracture mechanisms in fine- and ultrafine-grained ferrite/martensite dual-phase steels and the effect of aging [J]. Acta Mater,2011,59:658. 18 Min X H, Emura S, Zhang L, et al. Improvement of strength-ductility tradeoff in β titanium alloy through pre-strain induced twins combined with brittle ω phase [J]. Mater Sci Eng A,2015,646:279. 19 Cai M H, Wei X, Rolfe B, et al. Microstructure and texture evolution during tensile deformation of symmetric/asymmetric-rolled low carbon microalloyed steel [J]. Mater Sci Eng A,2015,641:297.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2017, Vol. 31 
