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
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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. |
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