Tensile fracture behavior of spray-deposited SiCP/Al-Fe-V-Si composite sheet
Tensile fracture behavior of spray-deposited SiCP/Al-Fe-V-Si composite sheet
复制标题
喷射沉积SiCP/Al-Fe-V-Si复合材料板材的拉伸断裂行为
DOI：
10.1080/09243046.2013.796626
复制
发表时间：
2013-08-01
影响因子：
2.9
通讯作者：
Sun, Youping
中科院分区：
文献类型：
--
作者：
He, Yiqiang;Tu, Hong;Sun, Youping
采用喷射沉积法制备了SiCP/Al-Fe-V-Si（SiC颗粒增强Al-Fe-V-Si）复合材料。观察了复合材料的显微组织，研究了复合材料在不同拉伸温度下的断裂性能和断口形貌。结果表明，热压后轧制可使SiC颗粒分布均匀，颗粒与基体结合牢固。结果表明，复合材料的断裂性能和断口形貌受SiC颗粒的分布和取向的影响。复合材料的断口形貌随温度的升高而变化。SiC颗粒的开裂是主要的断裂模式，因为在低于300 ℃的拉伸温度下具有强的界面结合。当拉伸温度高于300 ℃时，SiC/Al基体界面的脱粘成为主要的断裂方式，随着拉伸温度的升高，颗粒破碎率急剧下降，而复合材料的拉伸强度和伸长率则随着拉伸温度的升高而迅速下降。
SiCP/Al-Fe-V-Si (Al-Fe-V-Si reinforced with SiC particles) composite prepared by spray deposition was densified by hot pressing and then rolled into sheets. Microstructure of the composite was observed, and fracture properties and fractographies of the composite at different tensile temperatures were investigated. The results show that uniform distribution of SiC particles and strong bonding between the particles and the matrix are obtained by rolling after hot pressing. It is found that fracture properties and fractographies of the composite are affected by the distribution and orientation of SiC particles. The composite is characterized by the fractographies of the composite varying with the elevation of temperature. Cracking of SiC particles is the dominant rupture mode because of the strong interface bonding with the tensile temperature below 300 degrees C. Debonding at SiC/Al matrix interfaces becomes the dominant rupture mode with tensile temperature above 300 degrees C, particles breakage reduces sharply as the tensile temperature is elevated, while tensile strength and elongation of the composite decreases rapidly as the tensile temperature increases.