Investigation of multiple strengthening mechanism in pure titanium

	Investigation of multiple strengthening mechanism in pure titanium
	Zhang, JB; Ji, GS; Fan, D; Xu, JL
	2002
关键词	biomaterials titanium shot peening fatigue
页码	147-149
英文摘要	The goal of the project is to increase the fatigue strength of pure titanium for medical implants by multiple strengthening. The processes combine quenching and shot peening. Fatigue behavior has been studied on shot peened smooth specimens of pure titanium under three-point bending tests, and the obtained results are compared with those of quenched specimens. Based on detailed transmission electron microscopy (TEM) observations of the local plastic deformation and X-ray diffraction (XRD) measurements of the residual stresses, the improvement in fatigue strength by shot peening in pure titanium was primarily attributed to compressive residual stresses and deformation twins induced at near surface layer. The microstructure of pure titanium formed by aligned martensite plates, while in shot peening specimens, high density dislocations, deformation twins and deformation bands formed in the strengthened surface layers. Compressive residual stress occurred, and then partially relaxed under fatigue loading. The mechanisms of the enhancement of fatigue strength were explained by the factors that had been mentioned.
会议录	CONTRIBUTIONS OF SURFACE ENGINEERING TO MODERN MANUFACTURING AND REMANUFACTURING
会议录出版者	SOUTHWEST JIAOTONG UNIV PRESS
会议录出版地	ERHUAN RD, CHENGDU 610031, SICHUAN, PEOPLES R CHINA
语种	英语
WOS研究方向	Engineering ; Materials Science
WOS记录号	WOS:000180624600027
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/38377]
专题	材料科学与工程学院
通讯作者	Zhang, JB
作者单位	Gansu Univ Technol, Coll Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Zhang, JB,Ji, GS,Fan, D,et al. Investigation of multiple strengthening mechanism in pure titanium[C]. 见:.