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本文研究了不同变形量的冷轧铜板经再结晶退火后的内耗和切变模量随温度的变化。在内耗-温度曲线上280℃附近出现一个内耗峰,这个内耗峰是晶粒间界粘滞性滑动引起的,它的高度随退火前的冷轧变形量的增大而降低,经过大的变形后内耗峰消失。实验表明,晶粒间界内耗峰的消长与(100)[001]立方织构的形成有关。从晶粒间界的结构作了进一步的讨论。 与晶粒间界内耗峰消长相对应,切变模量的相对值也不同。切变模量的增加量也与退火前的冷轧变形量和立方织构形成有关,实验结果与理论计算作了比较,符合得较好。
In this paper, the variation of internal friction and shear modulus of recrystallization-annealed cold-rolled copper sheets with different deformations with temperature is studied. A friction peak near 280 ° C appears on the internal friction temperature curve, which is caused by viscous sliding of the grain boundary. Its height decreases with the increase of the cold rolling deformation before annealing. After large deformation After the peak consumption disappears. Experiments show that the growth and decline of the internal peak of grain boundary is related to the formation of (100) [001] cubic texture. The structure of the grain boundaries is further discussed. Correspondingly, the relative value of shear modulus is also different from the peak consumption and dissipation within the grain boundaries. The increase of shear modulus is also related to the amount of cold rolling deformation and cubic texture before annealing. The experimental results are in good agreement with the theoretical calculations.