Sheraf Jakie, Gnanaraj S Darius
School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India.
School of Design (V-SIGN), Vellore Institute of Technology, Vellore, India.
Heliyon. 2024 Oct 11;10(20):e39289. doi: 10.1016/j.heliyon.2024.e39289. eCollection 2024 Oct 30.
Functionally graded materials (FGMs) have a gradient of properties along their dimensions. These materials are resistant to delamination, making them ideal for replacing conventional composites in various fields of engineering. Among FGMs, aluminium-based FGMs are receiving a lot of attention due to their versatility. Al-AlO FGMs, in particular, are widely preferred in the aerospace and automobile sectors. This study involves synthesizing a 4-layered FG Al-AlO MMC through PM. The material is subjected to impact, compression, and hardness tests, to assess its mechanical properties. To understand the characteristics of the material, Optical microscopy, SEM, and XRD are carried out. The powder metallurgy route produces FG MMCs with improved properties. The material exhibited an impressive hardness of 183 HV at the top layer, which is higher than similar FGMs and FGMs fabricated via Centrifugal Casting. The compressive strength of Al-AlO FGM is 138 MPa and the impact strength is 16.25 kJ/m. Owing to the improved properties and FGMs being resistant to delamination mode of failure the study recommends the material as a replacement for conventional Al-AlO.
功能梯度材料（FGMs）沿其尺寸方向具有性能梯度。这些材料具有抗分层性，使其成为在各种工程领域中替代传统复合材料的理想选择。在功能梯度材料中，铝基功能梯度材料因其多功能性而备受关注。特别是Al-AlO功能梯度材料，在航空航天和汽车领域中被广泛青睐。本研究涉及通过粉末冶金法合成一种4层的FG Al-AlO金属基复合材料。对该材料进行冲击、压缩和硬度测试，以评估其力学性能。为了解该材料的特性，进行了光学显微镜、扫描电子显微镜和X射线衍射分析。粉末冶金路线制备出了性能得到改善的功能梯度金属基复合材料。该材料顶层的硬度达到了令人印象深刻的183 HV，高于类似的功能梯度材料以及通过离心铸造法制备的功能梯度材料。Al-AlO功能梯度材料的抗压强度为138 MPa，冲击强度为16.25 kJ/m。由于性能得到改善且功能梯度材料具有抗分层失效模式，该研究建议将这种材料作为传统Al-AlO的替代品。
