Effects of repeated loading on the fracture behavior of notched TiAl specimens

doi:10.1016/j.engfracmech.2008.03.015

	Effects of repeated loading on the fracture behavior of notched TiAl specimens
	Cao, R.1 ; Chen, J. H.1; Zhang, J.2; Zhu, H.1
	2008-09
发表期刊	ENGINEERING FRACTURE MECHANICS
ISSN	0013-7944
卷号	75 期号:14 页码:4019-4035
摘要	Notched specimens of a fully lamellar TiAl alloy and a duplex TiAl alloy were in situ tensile tested with repeated loading-unloading-reloading processes in a scanning electron microscope (SEM). The step-by-step processes of initiation and extension of the main crack were captured by SEM. The fracture surfaces were observed and one-sector-to-one-sector related to the crack extension. Effects of loading-unloading damage on the fracture behavior were evaluated by combining the pictures of propagating crack configurations, corresponding fracture surfaces and the load locus. The results revealed the following events: (1) at the elastic regime, the loading-unloading process had negligible effect on the fracture behavior produced by subsequent reloading; (2) at the plastic regime, even at a value much lower than that of the preload, the reload extended further the existing main crack; (3) after a heavy loading-unloading process, the main crack extended and resulted in final fracture at a value of the reload, which was lower than that of the preload and (4) microcracks produced in the loading-unloading process had minor effects on the fracture behavior. (c) 2008 Elsevier Ltd. All rights reserved.
关键词	TiAl alloy in situ tensile test notched specimen microcracks
DOI	10.1016/j.engfracmech.2008.03.015
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Mechanics
WOS类目	Mechanics
WOS记录号	WOS:000257350300001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
EI入藏号	20082311299530
EI主题词	Titanium alloys
EI分类号	542.3 Titanium and Alloys - 931.1 Mechanics - 951 Materials Science
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/35475
专题	材料科学与工程学院
通讯作者	Chen, J. H.
作者单位	1.Lanzhou Univ Technol, Off President, State Key Lab Adv Nonferrous Met Mat, Lanzhou 730050, Gansu, Peoples R China 2.Cent Iron & Steel Res Inst, High Temp Mat Res Div, Beijing 100081, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Cao, R.,Chen, J. H.,Zhang, J.,et al. Effects of repeated loading on the fracture behavior of notched TiAl specimens[J]. ENGINEERING FRACTURE MECHANICS,2008,75(14):4019-4035.
APA	Cao, R.,Chen, J. H.,Zhang, J.,&Zhu, H..(2008).Effects of repeated loading on the fracture behavior of notched TiAl specimens.ENGINEERING FRACTURE MECHANICS,75(14),4019-4035.
MLA	Cao, R.,et al."Effects of repeated loading on the fracture behavior of notched TiAl specimens".ENGINEERING FRACTURE MECHANICS 75.14(2008):4019-4035.

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