中文摘要：

在这研究， SiC/AA6061 composites 与不同原文如此，体积部分(5% ， 10% ， 15% 和 20%) 被火花血浆 sintering 制作。composites 的变丑行为被单轴的压缩测试从 573K 在温度学习到在 0.001s ¹ 和 1s ¹ 之间的 773K 和种类率。结果显示 SiC/AA6061 composites 的流动压力随增加增加原文如此体积部分，与变丑温度的减少并且与种类的减少评价。composites 的主要变丑机制是动态 recrystallisation (DRX ) ，并且 DRX 度取决于变丑的处理参数。更高，原文如此，体积部分，更高的变丑温度和更低的变丑种类率支持 DRX 的出现。紧张率敏感和 SiC/AA6061 composites 的变丑激活精力是计算的。结果随的变丑温度和减少的增加显示出那原文如此体积部分， composites 的紧张率敏感增加。从 573K，到 773K， 5vol .%SiC/AA6061 的平均变丑激活精力， 10vol .%SiC/AA6061， 15vol .%SiC/AA6061 和 20vol， .%SiC/AA6061 是 207.91， 230.88， 237.7 并且 249.87kJmol ¹, 分别地。SiC/AA6061 composites 的热工作地区在到在紧张的 773K 的 723K 的温度范围的最佳从 0.1s ¹ 评价到 1s ¹ 。

英文摘要：

In this study, SiC/AA6061 composites with different SiC volume fractions （5%, 10%, 15% and 20%） were fabricated by spark plasma sintering. The deformation behaviour of the composites was studied by uni- axial compression test at temperatures from 573 K to 773 K and strain rates between 0.001 s^-1 and 1 s^-1. Results indicate that the flow stress of SiCIAA6061 composites increases with the increase of SiC volume fraction, with the decrease of deformation temperature and with the decrease of strain rate. The main deformation mechanism of the composites is dynamic recrystallisation （DRX）, and the DRX degree depends on the processing parameters of deformation. Higher SiC volume fraction, higher deformation temper- ature and lower deformation strain rate promote the occurrence of DRX. The strain rate sensitivity and deformation activation energy of SiC/AA6061 composites are calculated. Results show that with the in- crease in deformation temperature and the decrease in SiC volume fraction, the strain rate sensitivity of the composites increases. From 573 K to 773 K, the average deformation activation energy of 5vol.%SiC/ AA6061, 10voI.%SiC/AA6061, 15voI.%SiC/AA6061 and 20vol.%SiC/AA6061 are 20Z91, 230.88, 237.7 and 249.87 kJ mol^-1, respectively. The optimum hot working zone of the SiC/AA6061 composites is in the tem- perature range of 723 K to 773 K at strain rates from 0.1 s^-1 to 1 s^-1.