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INFLUENCES OF MICROSTRUCTURE ON FATIGUE CRACK PROPAGATING PATH AND CRACK GROWTH RATES IN TC4ELI ALLOY
Ma Yingjie1; Li Jinwei2; Lei Jiafeng1; Tang Zhenyun2; Liu Yuyin1; Yang Rui1
Corresponding AuthorYang Rui(ryang@imr.ac.cn)
2010-09-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume46Issue:9Pages:1086-1092
AbstractLong 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.
Keywordtitanium alloy microstructure crack propagating path crack growth rate
DOI10.3724/SP.J.1037.2010.00155
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000282804800010
PublisherSCIENCE PRESS
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/100547
Collection中国科学院金属研究所
Corresponding AuthorYang Rui
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.AVIC Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China
Recommended Citation
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.
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