论文部分内容阅读
研究了应力、温度和热处理对22vol%莫来石短纤维增强LY12复合材料性能的影响,实验采用铸态、退火态和T4处理复合材料,三种状态下复合材料的抗蠕变性能均高于基体材料LY12铝合金。文中提出一种复合材料的蠕变机制:在低应力阶段,复合材料的蠕变受位错的攀移过程所控制;在高应力阶段,复合材料的蠕变受增强体与基体的界面所控制。用TEM分析了材料的界面。
The effects of stress, temperature and heat treatment on the properties of 22 vol% mullite short fiber reinforced LY12 composites were studied. The as-cast, annealed and T4 composites were used to treat the composites. The creep resistance of the composites was higher than that of the composites Base material LY12 aluminum alloy. In this paper, a creep mechanism of composite materials is proposed. During the low stress phase, the creep of the composites is controlled by the climbing process of the dislocations. In the high stress phase, the creep of the composites is controlled by the interface between the reinforcement and the matrix . TEM analysis of the material interface.