Tensile properties of tungsten-rhenium wires with nanofibrous structure
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第9期
论文作者：Na-na Qiu Yin Zhang Cheng Zhang Huan Tong Xi-ping Song
文章页码：1055 - 1059
摘 要：In this study, the mechanical properties of tungsten-rhenium wires with nanofibrous microstructure were investigated at both room temperature（RT） and 800?C. The strengthening mechanism associated to the nanofibrous microstructure was discussed. The results showed that the tungsten-rhenium wires with nanofibrous grains exhibited a very high tensile strength reaching values of 3.5 GPa and 4.4 GPa for the coarse（grains diameter of 240 nm） and fine（grains diameter of 80 nm） wires, respectively. With increasing the temperature from RT to 800?C, the tensile strength decreased slightly but still held high values（1.8 GPa and 3.8 GPa）. All the fracture surfaces exhibited apparent necking and characteristics of spear-edge shaped fracture surface, indicating excellent ductility of the wires. A model of the strengthening mechanism of these tungsten-rhenium wires was proposed.
Na-na Qiu，Yin Zhang，Cheng Zhang，Huan Tong，Xi-ping Song
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
摘 要：In this study, the mechanical properties of tungsten-rhenium wires with nanofibrous microstructure were investigated at both room temperature（RT） and 800?C. The strengthening mechanism associated to the nanofibrous microstructure was discussed. The results showed that the tungsten-rhenium wires with nanofibrous grains exhibited a very high tensile strength reaching values of 3.5 GPa and 4.4 GPa for the coarse（grains diameter of 240 nm） and fine（grains diameter of 80 nm） wires, respectively. With increasing the temperature from RT to 800?C, the tensile strength decreased slightly but still held high values（1.8 GPa and 3.8 GPa）. All the fracture surfaces exhibited apparent necking and characteristics of spear-edge shaped fracture surface, indicating excellent ductility of the wires. A model of the strengthening mechanism of these tungsten-rhenium wires was proposed.
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