铝箔微观组织对其力学性能的影响

来源期刊：中南大学学报(自然科学版)2005年第5期

论文作者：刘楚明 李鹏 樊玉庆 蒋树农 张新明

文章页码：780 - 783

关键词：铝箔;抗拉强度;微观组织

Key words：aluminum foil; tensile strength; microstructure

摘    要：采用拉伸实验和透射电子显微镜分析了铝箔微观组织对厚度为6~7μm的铝箔力学性能的影响。实验结果表明:铝箔中化合物的形貌及析出位置较退火工艺对铝箔抗拉强度的影响更大,处于晶界的块状化合物破坏了晶界的整体联系,增加了铝箔微观组织的不均匀性;提高铝箔强度时应尽量避免化合物在晶界处析出。亚晶的尺寸与位错密度紧密相关,亚晶尺寸小,单位体积内亚晶界增加,位错密度也随之增加。铝箔具有较小的亚晶尺寸,因而具有较高的抗拉强度。

Abstract: The effect of microstructure on the mechanical property of aluminum foil (6~7μm in thickness) was investigated by means of tensile test and transmission electron microscopy. The results show that the morphology and position of compound have greater effects on the mechanical property of aluminum foil than the annealing process. The block-like compound on the grain boundaries will damage the integrity of grain boundaries and increase the microstructural inhomogeneity of aluminum foil, which is harmful to the mechanical property of aluminum foil. Therefore, it is necessary to prevent the compound from precipitating on the grain boundaries. There is a close relationship between the size of the subgrain and the density of dislocation, that is, the subgrain boundaries per unit and the density of dislocation increase with the decrease of the size of the subgrain. The aluminum foil with smaller subgrain would have a high tensile strength.

基金信息：国家“973”重点基础研究发展规划项目