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

doi:10.3724/SP.J.1037.2010.00155

IMR OpenIR

	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
通讯作者	Yang Rui(ryang@imr.ac.cn)
	2010-09-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	46 期号:9 页码:1086-1092
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.
关键词	titanium alloy microstructure crack propagating path crack growth rate
DOI	10.3724/SP.J.1037.2010.00155
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000282804800010
出版者	SCIENCE PRESS
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/100547
专题	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.