材料期刊网

High Temperature Tensile Properties of 30 vol. Pct ZrCp/W Composite

Yujin WANG , Yu ZHOU , Guiming SONG , Tingquan LEI

材料科学技术（英文）

In order to improve the high temperature strength of tungsten, 30~vol. pct ZrC particles were added to the tungsten matrix to form a 30ZrCp/W composite. The tensile properties from 20℃ to 1880℃ of the composite were examined. It was shown that with increasing testing temperature, the nonlinearity of the stress strain curve of 30ZrCp/W composite becames obvious over 1200℃ and the Young’s modulus decreases and the elongation increases. The ultimate tensile strength increases at first and then decreases with increasing testing temperature. The maximum strength of 431 MPa was obtained at 1000℃. The strengthening mechanism at high temperatures is the load transfer to ZrC particles and dislocation strengthening of the tungsten matrix with an effect of grain boundary strengthening.

关键词: ZrCp/W composite , null , null , null

Dislocation Behavior in ZrC Particles during Elevated Temperature Compressive Deformation of a 30 vol.% ZrC_p/W Composite

Taiquan Zhang

材料科学技术（英文）

A 30 vol.% ZrC_p/W composite has been deformed in compression in the temperature range of 1200-1600°C. Dislocation nucleation mechanism in ZrC particles is discussed by analyzing the harmonious deformation between tungsten-matrix and ZrC particles. Thermal activation apparently increases the mobility of screw segments, resulting in the formation of many kinetics jogs and thermodynamics jogs above 1300°C. The formation mechanisms of the dislocation configurations are studied.

关键词: ZrC_p/W composite

Dislocation Behavior in ZrC Particles during Elevated Temperature Compressive Deformation of a 30 vol.% ZrC_p/W Composite

Taiquan Zhang

材料科学技术（英文）

A 30 vol.% ZrC_p/W composite has been deformed in compression in the temperature range of 1200-1600°C. Dislocation nucleation mechanism in ZrC particles is discussed by analyzing the harmonious deformation between tungsten-matrix and ZrC particles. Thermal activation apparently increases the mobility of screw segments, resulting in the formation of many kinetics jogs and thermodynamics jogs above 1300°C. The formation mechanisms of the dislocation configurations are studied.

关键词: ZrC_p/W composite

High Temperature Tensile Properties of 30 vol. pct ZrCp/W Composite

材料科学技术（英文）

关键词: