Evaluation of Microstructure, Hardness, and Tensile Properties: A Comparative Study of Stir Cast and Extruded Al7005/Glass-/Fly-Ash-Reinforced Hybrid MMCs
Evaluation of Microstructure, Hardness, and Tensile Properties: A Comparative Study of Stir Cast and Extruded Al7005/Glass-/Fly-Ash-Reinforced Hybrid MMCs
复制标题
微观结构、硬度和拉伸性能的评估：搅拌铸造和挤压 Al7005/玻璃/粉煤灰增强混合 MMC 的比较研究
DOI：
10.1155/2021/8601484
复制
发表时间：
2021
影响因子：
--
通讯作者：
Dadapeer Basheer
中科院分区：
文献类型：
--
作者：
Praveen Kumar Swamy;Shantharaja Mylaraiah;Dadapeer Basheer
研究了挤压比、玻璃和粉煤灰的加入量对铝基复合材料的显微组织、力学性能和断裂行为的影响。复合材料和混杂复合材料均采用液态冶金技术制备。利用光学显微镜、硬度计、万能试验机和扫描电镜分别研究了挤压对合金显微组织、硬度、拉伸性能和断口的影响。实验结果表明，增加挤压比导致的力学性能，如拉伸，压缩，屈服强度和杨氏模量的显着增强，但在一个小的延性降低的结果。结果表明，玻璃和粉煤灰的存在下，改善了机械性能显着的延展性略有下降相比，铝合金。用扫描电镜观察了基体合金和复合材料的断裂行为，结果表明基体合金和复合材料均表现为沿晶韧性断裂和脆性解理断裂。
The effect of extrusion ratio and addition of glass and fly ash on microstructural, mechanical properties, and fracture behavior of Al composites is examined. Both the composites and hybrid composites are prepared by the liquid metallurgical technique. Microstructure, extrusion effect on hardness, tensile properties, and fracture are studied using an optical micrograph, hardness tester, Universal Testing Machine, and scanning electron microscope, respectively. Experimental results show that increasing the extrusion ratio leads to a significant enhancement in mechanical properties such as tensile, compression, and yield strength and Young’s modulus, but results in a small reduction of ductility. It has been revealed that the presence of glass and fly ash improve the mechanical properties significantly with a slight reduction in ductility compared to the Al alloy. Fracture behaviour of the base alloy and composites show intergranular ductile and brittle cleavage mode failure as observed by SEM.