| Effects of cooling rate on the fracture properties of TA15 ELI alloy plates |
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| 引用本文： | LI Shikai XIONG Baiqing HUI Songxiao. Effects of cooling rate on the fracture properties of TA15 ELI alloy plates[J]. 稀有金属(英文版), 2007, 26(1): 33-38. DOI: 10.1016/S1001-0521(07)60024-2 |
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| 作者姓名： | LI Shikai XIONG Baiqing HUI Songxiao |
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| 作者单位： | State Key Laboratory for Fabrication and Processing of Nonferrous Metals, General Research Institute for Nonferrous Metals, Beijing 100088, China |
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| 基金项目： | The authors acknowledge Prof. WANG Xizhe, ZHANG Zhu, Engineer YE Wenjun, and YU Yang for their help in the study, and the Baoji Titanium Induslry Co. Ltd. for supplying the material. |
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| 摘 要： | The effects of cooling rate on the mechanical properties and the fatigue crack growth behavior of TA15 ELI alloy plates with different microstructures were investigated at room temperature. The results indicate that the cooling rate （water quench, air cooling, and furnace cooling） has a pronounced influence on the mechanical properties and on the fatigue crack growth, especially for air cooling and furnace cooling. Optical microstructure observation and scanning electron microscopy of tensile fracture surfaces were performed to gain an insight into the mechanism of properties. The dependence of mechanical properties and fatigue crack growth behavior on the cooling rate can be attributed to the oc lamellae width and the colony size, which induce the change in slip length. The microstmcture produced by air cooling shows the best damage tolerance behavior when compared with water quench and furnace cooling.
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| 关 键 词： | TA15ELI合金板 热处理 冷却速度 断裂特性 疲劳裂纹扩展 |
| 收稿时间： | 2006-06-29 |
Effects of cooling rate on the fracture properties of TA15 ELI alloy plates |
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| LI Shikai,XIONG Baiqing,HUI Songxiao. Effects of cooling rate on the fracture properties of TA15 ELI alloy plates[J]. Rare Metals, 2007, 26(1): 33-38. DOI: 10.1016/S1001-0521(07)60024-2 |
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| Authors: | LI Shikai XIONG Baiqing HUI Songxiao |
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| Affiliation: | 1. Center for the Accelerated Maturation of Materials, Department of Materials Science and Engineering, The Ohio State University, 1305 Kinnear Road, Columbus, OH 43212, USA;2. Center for Advanced Research and Technology, Department of Materials Science and Engineering, University of North Texas, 3940 N. Elm, Denton, TX 76207, USA;3. Center of Microstructure Science, Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi''an Jiao Tong University, Xi''an 710049, China |
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| Abstract: | The effects of cooling rate on the mechanical properties and the fatigue crack growth behavior of TA15 ELI alloy plates with different microstructures were investigated at room temperature. The results indicate that the cooling rate (water quench, air cooling, and furnace cooling) has a pronounced influence on the mechanical properties and on the fatigue crack growth,especially for air cooling and furnace cooling.Optical microstructure observation and scanning electron microscopy of tensile fracture surfaces were performed to gain an insight into the mechanism of properties.The dependence of mechanical properties and fatigue crack growth behavior on the cooling rate can be attributed to the α lamellae width and the α colony size,which induce the change in slip length. The microstructure produced by air cooling shows the best damage tolerance behavior when compared with water quench and furnace cooling. |
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| Keywords: | heat treatment fatigue crack growth microstructure TA15 ELI |
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