The fracture behaviour of intermetallic TiAl alloys with and without warm pre-stressing

doi:10.1023/A:1014277323105

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	The fracture behaviour of intermetallic TiAl alloys with and without warm pre-stressing
	Chen, JH ; Pippan, R ; Hebesberger, T ; Kolednik, O
刊名	INTERNATIONAL JOURNAL OF FRACTURE
	2002-02
卷号	113 期号:4 页码:327-343
关键词	cleavage fracture intermetallic alloy TiAl warm pre-stressing
ISSN号	0376-9429
DOI	10.1023/A:1014277323105
英文摘要	The fracture behaviour of near-gamma (NG) and fully lamellar (DFL) intermetallic TiAl alloys with and without warm pre-stressing (WPS) is investigated by testing three point bending specimens with fatigue pre-cracks at room temperature and at 700 degreesC. Detailed fractographic observations and FEM calculations are carried out to find the critical step of cleavage fracture. The results show that the cleavage fracture is induced by direct propagation of the pre-crack and that the stress at the crack tip is the decisive controlling factor. The WPS process improves the fracture initiation toughness of both the NG and the DFL microstructure, but deteriorates slightly the increase of the K-resistance curves, especially for the DFL microstructure. The compressive residual stress induced by WPS plays the main role in improving the fracture initiation toughness.
WOS研究方向	Materials Science ; Mechanics
语种	英语
出版者	KLUWER ACADEMIC PUBL
WOS记录号	WOS:000173986600003
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35916]
专题	兰州理工大学
通讯作者	Chen, JH
作者单位	1.Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria 2.Univ Leoben, Inst Met Phys, A-8700 Leoben, Austria 3.Gansu Univ Technol, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Chen, JH,Pippan, R,Hebesberger, T,et al. The fracture behaviour of intermetallic TiAl alloys with and without warm pre-stressing[J]. INTERNATIONAL JOURNAL OF FRACTURE,2002,113(4):327-343.
APA	Chen, JH,Pippan, R,Hebesberger, T,&Kolednik, O.(2002).The fracture behaviour of intermetallic TiAl alloys with and without warm pre-stressing.INTERNATIONAL JOURNAL OF FRACTURE,113(4),327-343.
MLA	Chen, JH,et al."The fracture behaviour of intermetallic TiAl alloys with and without warm pre-stressing".INTERNATIONAL JOURNAL OF FRACTURE 113.4(2002):327-343.