| Tensile and fracture properties of Ti-62A alloy plate with different microstructures |
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| 作者姓名： | LIU Rui HUI Songxiao YE Wenjun YU Yang FU Yanyan SONG Xiaoyun DENG Xiguang |
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| 作者单位： | State Key Laboratory of Nonferrous Metals & Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China |
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| 基金项目： | supported by the National Natural Key Technology R&D Program of China (No. 2008BAE62B00) |
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| 摘 要： | Ti-62A alloy plates with three different types of microstructure,fully equiaxed,bimodal,and Widmanst(a)tten,were obtained by various heat treatments to investigate the effects of microstructure on the tensile and fracture properties at room temperature.The results reveal that Widmanst(a)tten microstructure exhibits good damage tolerance behavior considering strength,fracture toughness,and fatigue crack growth behavior,while the bimodal microstructure shows good comprehensive properties considering the plasticity synthetically.Optical microscopy (OM) and scanning electron microscopy (SEM) microstructure analyses on fracture and fatigue crack path demonstrate that the dependence of mechanical properties and fatigue crack growth behavior on microstructural feature are attributed to the α lamellae width and the α colony size.
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| 关 键 词： | titanium alloy damage tolerance tensile properties fracture toughness fatigue crack growth rate |
Tensile and fracture properties of Ti-62A alloy plate with different microstructures |
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| LIU Rui,HUI Songxiao,YE Wenjun,YU Yang,FU Yanyan,SONG Xiaoyun,DENG Xiguang.Tensile and fracture properties of Ti-62A alloy plate with different microstructures[J].Rare Metals,2012,31(5):420-423. |
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| Authors: | LIU Rui HUI Songxiao YE Wenjun YU Yang FU Yanyan SONG Xiaoyun DENG Xiguang |
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| Affiliation: | State Key Laboratory of Nonferrous Metals & Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China |
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| Abstract: | Ti-62A alloy plates with three different types of microstructure, fully equiaxed, bimodal, and Widmanst?tten, were obtained by various heat treatments to investigate the effects of microstructure on the tensile and fracture properties at room temperature. The results reveal that Widmanst?tten microstructure exhibits good damage tolerance behavior considering strength, fracture toughness, and fatigue crack growth behavior, while the bimodal microstructure shows good comprehensive properties considering the plasticity synthetically. Optical microscopy (OM) and scanning electron microscopy (SEM) microstructure analyses on fracture and fatigue crack path demonstrate that the dependence of mechanical properties and fatigue crack growth behavior on microstructural feature are attributed to the ?? lamellae width and the ?? colony size. |
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| Keywords: | titanium alloy damage tolerance tensile properties fracture toughness fatigue crack growth rate |
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