Tensile and fracture properties of Ti-62A alloy plate with different microstructures
来源期刊：Rare Metals2012年第5期
论文作者：LIU Rui, HUI Songxiao, YE Wenjun, YU Yang, FU Yanyan, SONG Xiaoyun, and DENG Xiguang State Key Laboratory of Nonferrous Metals & Processes, General Research Institute for Nonferrous Metals, Beijing , China
文章页码：420 - 423
摘 要：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 α lamellae width and the α colony size.
LIU Rui, HUI Songxiao, YE Wenjun, YU Yang, FU Yanyan, SONG Xiaoyun, and DENG Xiguang State Key Laboratory of Nonferrous Metals & Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China
摘 要：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 α lamellae width and the α colony size.
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