Plastic Deformation Behavior of Biomedical Ti-24Nb-4Zr-8Sn Single Crystal Alloy

doi:10.11900/0412.1961.2017.00255

CORC > 金属研究所 > 中国科学院金属研究所

	Plastic Deformation Behavior of Biomedical Ti-24Nb-4Zr-8Sn Single Crystal Alloy
	Zhang Jinrui 1,2; Zhang Yanwei 3; Hao Yulin 2; Li Shujun 2; Yang Rui 2
刊名	ACTA METALLURGICA SINICA
	2017-10-11
卷号	53 期号:10 页码:1385-1392
关键词	biomedical metal titanium alloy single crystal plastic deformation
ISSN号	0412-1961
DOI	10.11900/0412.1961.2017.00255
通讯作者	Hao Yulin(ylhao@imr.ac.cn)
英文摘要	Excellent corrosion resistance, good biocompatibility and relatively low elastic modulus make Ti and Ti alloys fulfill the property requirements in the biomedical field better than other competing materials such as stainless steels. Even so, there still exist some problems to be solved such as the biological toxicity of some alloy elements and the so-called stress shielding effect caused by higher elastic modulus than that of human bone. In response to these issues, several metastable b-type Ti alloys were developed with the advantage of nontoxicity and a much lower elastic modulus. Ti-24Nb-4Zr-8Sn (mass fraction, %, abbreviated Ti2448) alloy is a multifunctional biomedical Ti alloy with high strength and low elastic modulus, which makes it show great application prospect in the field of body implant. It put up obvious nonlinear elasticity and highly localized plastic deformation behavior. Study on deformation behavior of single crystal can help to understand the deformation mechanism of polycrystalline alloy. In this work, Ti2448 single crystal alloy along three different orientations were prepared by optical floating zone method. The plastic deformation behaviors of them under tensile stress were investigated in terms of mechanical properties, slip system and fracture morphology. Results show that Ti2448 single crystal shows obvious anisotropy, the tensile strengths along < 100>, < 110> and < 111> orientations are 650, 642 and 889 MPa, respectively, while the elongations are about 73%, 22% and 13%, respectively. The main plastic deformation mechanism of Ti2448 single crystal alloy is by slip. The appearance of slip bands and its direction relationship with crystal orientation were detailed observed. Under tensile stress, the operated slip systems for < 100>, < 110> and < 111> orientation single crystals are (112)[111]/(112)[111]/(112)[111]/(112)[111], (211) [111]/(211)[111] and (211)[111], respectively. This is in accordance with the law of critical shearing stress. SEM analyses show a fracture surface shape of rectangle, duckbilled and triangle for the < 100>, < 110> and < 111> orientation single crystals, respectively. The intersection angle between fracture surface and loading direction is all about 55 degree, and a lot of dimple was detected that show ductile fracture mode.
资助项目	National Natural Science Foundation of China[51571190] ; National Natural Science Foundation of China[51271180] ; National Natural Science Foundation of China[51631007] ; National Natural Science Foundation of China[51527801] ; National High Technology Research and Development Program of China[2015AA033702] ; National Key Research and Development Program of China[2016YFC1102600] ; National Key Research and Development Program of China[2017YFC1104903]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000416301400022
资助机构	National Natural Science Foundation of China ; National High Technology Research and Development Program of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/127026]
专题	金属研究所_中国科学院金属研究所
通讯作者	Hao Yulin
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Suzhou Nucl Power Res Inst, Life Management Technol Ctr, Suzhou 215004, Peoples R China
推荐引用方式 GB/T 7714	Zhang Jinrui,Zhang Yanwei,Hao Yulin,et al. Plastic Deformation Behavior of Biomedical Ti-24Nb-4Zr-8Sn Single Crystal Alloy[J]. ACTA METALLURGICA SINICA,2017,53(10):1385-1392.
APA	Zhang Jinrui,Zhang Yanwei,Hao Yulin,Li Shujun,&Yang Rui.(2017).Plastic Deformation Behavior of Biomedical Ti-24Nb-4Zr-8Sn Single Crystal Alloy.ACTA METALLURGICA SINICA,53(10),1385-1392.
MLA	Zhang Jinrui,et al."Plastic Deformation Behavior of Biomedical Ti-24Nb-4Zr-8Sn Single Crystal Alloy".ACTA METALLURGICA SINICA 53.10(2017):1385-1392.