INFLUENCES OF MICROSTRUCTURE ON FATIGUE CRACK PROPAGATING PATH AND CRACK GROWTH RATES IN TC4ELI ALLOY

doi:10.3724/SP.J.1037.2010.00155

CORC > 金属研究所 > 中国科学院金属研究所

	INFLUENCES OF MICROSTRUCTURE ON FATIGUE CRACK PROPAGATING PATH AND CRACK GROWTH RATES IN TC4ELI ALLOY
	Ma Yingjie 1; Li Jinwei 2; Lei Jiafeng 1; Tang Zhenyun 2; Liu Yuyin 1; Yang Rui 1
刊名	ACTA METALLURGICA SINICA
	2010-09-11
卷号	46 期号:9 页码:1086-1092
关键词	titanium alloy microstructure crack propagating path crack growth rate
ISSN号	0412-1961
DOI	10.3724/SP.J.1037.2010.00155
通讯作者	Yang Rui(ryang@imr.ac.cn)
英文摘要	Long fatigue crack propagating path in TC4ELI alloy with lamellar microstructure was studied by SEM. Statistics of angles between cracking path and alpha lamella exhibits that fatigue crack is apt to parallel alpha lamella or cross alpha lamella vertically, which will induce the ladder shape of crack propagating path. The parallel and vertical propagating patterns were interpreted with the weak alpha/beta interface and the orientation of hcp alpha-Ti unit cell. Analysis of crack propagating path helps to understand the effect of microstructure on fatigue crack growth (FCG) rates. FCG rates tests with different microstructures reveal that in near fatigue crack threshold (Delta K(th)) region the thickness of alpha lamella is the main influential factor on fatigue crack growth rate da/dN, and the da/dN seems impervious to beta grain size. However, in Paris region the FCG rates are both influenced by grain size and lamellar thickness.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000282804800010
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/100546]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang Rui
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.AVIC Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China
推荐引用方式 GB/T 7714	Ma Yingjie,Li Jinwei,Lei Jiafeng,et al. INFLUENCES OF MICROSTRUCTURE ON FATIGUE CRACK PROPAGATING PATH AND CRACK GROWTH RATES IN TC4ELI ALLOY[J]. ACTA METALLURGICA SINICA,2010,46(9):1086-1092.
APA	Ma Yingjie,Li Jinwei,Lei Jiafeng,Tang Zhenyun,Liu Yuyin,&Yang Rui.(2010).INFLUENCES OF MICROSTRUCTURE ON FATIGUE CRACK PROPAGATING PATH AND CRACK GROWTH RATES IN TC4ELI ALLOY.ACTA METALLURGICA SINICA,46(9),1086-1092.
MLA	Ma Yingjie,et al."INFLUENCES OF MICROSTRUCTURE ON FATIGUE CRACK PROPAGATING PATH AND CRACK GROWTH RATES IN TC4ELI ALLOY".ACTA METALLURGICA SINICA 46.9(2010):1086-1092.