Study on tensile fracture mechanisms of γ-TiAl alloys for near fully-lamellar microstructure at room temperature

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	Study on tensile fracture mechanisms of γ-TiAl alloys for near fully-lamellar microstructure at room temperature
	Cao, Rui ; Chen, Jianhong ; Zhang, Ji ; Wang, Guozhen
刊名	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
	2005-05-01
卷号	34 期号:5 页码:696-700
ISSN号	1002185X
英文摘要	In situ observations of fracture processes, combined with one to one related observations of fracture surfaces and finite element method (FEM) calculations, are carried out on notched tensile specimens of TiAl alloys for near fully-lamellar micro structure. The results reveal that most cracks are initiated and propagated at the interfaces between lamellae before plastic deformation. The driving force for fracture process is the tensile stress. In specimens with a slit notch, most cracks are initiated directly from the notch root and extend along lamellar interfaces. The main crack and a new crack are then linked by the translamellar cleavage fracture of the barrier grain with the increasing applied load. FEM calculations reveal that the strength along lamellar interfaces (interlamellar fracture) is as low as 50 MPa, appreciably lower than the strength perpendicular to the lamellae (translamellar fracture), which shows a value higher than 120 MPa.
语种	中文
出版者	Rare Metals Materials and Engineering Press, Xi'an, China
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151368]
专题	兰州理工大学
作者单位	1.Central Iron and Steel Research Institute, Beijing 100081, China 2.State Key Laboratory for New Non-ferrous Materials, College of Materials Science and Engineering, Lanzhou University of Science and Technology, Lanzhou 730050, China;
推荐引用方式 GB/T 7714	Cao, Rui,Chen, Jianhong,Zhang, Ji,et al. Study on tensile fracture mechanisms of γ-TiAl alloys for near fully-lamellar microstructure at room temperature[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2005,34(5):696-700.
APA	Cao, Rui,Chen, Jianhong,Zhang, Ji,&Wang, Guozhen.(2005).Study on tensile fracture mechanisms of γ-TiAl alloys for near fully-lamellar microstructure at room temperature.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,34(5),696-700.
MLA	Cao, Rui,et al."Study on tensile fracture mechanisms of γ-TiAl alloys for near fully-lamellar microstructure at room temperature".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 34.5(2005):696-700.