The orientation and temperature dependences of dislocation velocity in Ni_3Al single crystals

Z. F. Zhang; C. B. Jiang; S. D. Wu; S. Patu

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The orientation and temperature dependences of dislocation velocity in Ni_3Al single crystals

机译：Ni_3Al单晶中位错速度的取向和温度依赖性

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The average velocities of screw dislocations in Ni_3Al single crystals have been directly measured as a function of resolved shear stress (RSS) and orientation in the temperature domain of the flow stress anomaly using the etch-pit technique. The velocity was found to be extremely sensitive to the RSS in all cases. In contrast with ordinary metals, the screw dislocations velocities in Ni_3Al show anomalous behaviour; under a constant RSS, the velocities decrease dramatically with increasing temperature. Furthermore, the velocities and the tension-compression asymmetry of the velocities depend on the orientation of applied stress.

机译：使用刻蚀坑技术，已直接测量了Ni_3Al单晶中螺杆位错的平均速度，它是解析剪切应力（RSS）和流动应力异常温度域中取向的函数。发现在所有情况下，速度对RSS都极为敏感。与普通金属相比，Ni_3Al中的螺位错速度表现出异常的行为。在恒定的RSS下，速度会随着温度的升高而急剧下降。此外，速度和速度的拉伸-压缩不对称性取决于所施加应力的方向。

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《Philosophical Magazine Letters》 |2003年第9期|共6页
作者
Z. F. Zhang; C. B. Jiang; S. D. Wu; S. Patu;
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1. The orientation and temperature dependences of dislocation velocity in Ni_3Al single crystals [J] . Z. F. Zhang, C. B. Jiang, S. D. Wu, Philosophical Magazine Letters . 2003,第9期

机译：Ni_3Al单晶中位错速度的取向和温度依赖性
2. Dislocation velocities in Ni_3Al single crystals [J] . C. B. Jiang, S. Patu, Q. Z. Lei, Philosophical Magazine Letters . 1998,第1期

机译：Ni_3Al单晶中的位错速度
3. Orientation dependence of texture evolution in cold-rolled Ni_3Al single crystals [J] . K. Kishida, M. Demura, Y. Suga, Philosophical magazine: structure and properties of condensed matter . 2003,第26期

机译：Ni_3Al冷轧单晶织构演变的取向依赖性
4. Orientation Dependence of the Texture Evolution in Cold-Rolled Thin Foils of Ni_3Al Single Crystals [C] . Kyosuke Kishida, Masahiko Demura, Yozo Suga Materials Research Society Symposium . 2003

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5. Measurement of dislocation velocities and mobile dislocation densities as a function of strain and strain rate in cadmium single crystals. [D] . Robson, Mark Todhunter. 2003

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6. GROWTH ORIENTATION AND X-RAY DIFFRACTION OF SINGLE CRYSTALS NEAR LIQUID HELIUM TEMPERATURES [O] . William E. Streib, William N. Lipscomb 1962

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The orientation and temperature dependences of dislocation velocity in Ni_3Al single crystals

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