Murthy Bharath Vedashantha, Auradi Virupaxi, Nagaral Madeva, Vatnalmath Manjunath, Namdev Nagaraj, Anjinappa Chandrashekar, Patil Shanawaz, Razak Abdul, Alsabhan Abdullah H, Alam Shamshad, Qamar Mohammad Obaid
Department of Mechanical Engineering, RNS Institute of Technology, Visvesvaraya Technological University, Bengaluru 560098, Karnataka, India.
Department of Mechanical Engineering, Siddaganga Institute of Technology, Visvesvaraya Technological University, Tumakuru 572103, Karnataka, India.
ACS Omega. 2023 Mar 27;8(14):13444-13455. doi: 10.1021/acsomega.3c01163. eCollection 2023 Apr 11.
An Al2014-alumina (AlO) composite's characteristics are significantly influenced by the reinforcement particle size variation. Therefore, this study examines the microstructure, mechanical, fractography, and wear performance of an Al2014-AlO composite made using a unique two-stage stir casting method and various alumina weight fractions (9, 12, and 15 wt %). Three categories of alumina particle size are used, i.e., fine particle size (FPS, 8 μm), intermediate particle size (IPS, 53 μm), and coarse particle size (CPS, 88 μm). The shapes of the composites were characterized using scanning electron microscopy. According to scanning electron microscopic analyses of the microstructure, the FPS dispersion was more uniform than IPS and CPS, whereas CPS causes agglomeration. Additionally, the studies show that the FPS composite outperformed CPS and IPS composites in terms of mechanical characteristics and wear performance. The fractography study shows conical and equiaxed dimple failure in the Al2014 matrix and the circular cavities.
Al2014-氧化铝（AlO）复合材料的特性受到增强颗粒尺寸变化的显著影响。因此，本研究考察了采用独特的两步搅拌铸造法制备的、具有不同氧化铝重量分数（9%、12%和15%）的Al2014-AlO复合材料的微观结构、力学性能、断口形貌和磨损性能。使用了三类氧化铝颗粒尺寸，即细颗粒尺寸（FPS，8μm）、中等颗粒尺寸（IPS，53μm）和粗颗粒尺寸（CPS，88μm）。使用扫描电子显微镜对复合材料的形状进行了表征。根据微观结构的扫描电子显微镜分析，FPS的分散比IPS和CPS更均匀，而CPS会导致团聚。此外，研究表明，FPS复合材料在力学性能和磨损性能方面优于CPS和IPS复合材料。断口形貌研究表明，Al2014基体中存在锥形和等轴韧窝断裂以及圆形空洞。
