The University of Osaka · 공학
Abhishek Sharma 교수의 연구실은 마찰재료 공정 기반의 고성능 복합재료 개발에 초점을 맞추고 있습니다. 주로 알루미늄 기반 복합재료에 대해 Friction Stir Processing (FSP), Friction Stir Welding, Friction Stir Alloying 등의 기계적 가공 기법을 활용해 마이크로구조 제어와 기계적·마찰적 성질 향상을 연구하고 있습니다. 특히 그래핀 나노플레이트렛(GNP) 및 실리카 카본화합물(SiC, 그래파이트)을 포함한 하이브리드 복합재료의 표면 및 용접 공정에서의 거칠기 제어, 미세구조 제어, 그리고 기계적 거동 분석에 중점을 두고 있습니다. 이는 자동차 및 항공우주 분야에서의 응용 가능성을 고려한 실용적 소재 개발을 목표로 합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Friction stir processing (FSP) of Al6061-SiC-Graphite hybrid composites is studied in detail via force analysis, spectroscopic, microstructural and indentation studies. Effect of various tool rotational speeds was assessed, and the axial force variation was monitored. The presence of graphite as a reinforcement influences the axial force fluctuations due to its flaky nature and high thermal conductivity. Variation in microstructure at different tool rotational speed is studied using scanning ele
The present study aims to enhance the strength of friction stir lap welded aluminum alloys by using an interlayer of graphene nanoplatelets (GNPs) at the weld interface. With GNP interlayer, the weld strength and percentage elongation increased by 121 and 53%, respectively, as compared to the weld without GNP interlayer. The interlayer also changes the mode of fracture from brittle in the weld without GNP to ductile mode. Grain size in the weld with interlayer decreased by ~38% as equated to the
Friction stir alloying is primarily employed for the fabrication of surface composite to improve surface properties like hardness, wear resistance, and corrosion resistance without significantly affecting the bulk properties of the alloy. The present study demonstrates the novel method for the fabrication of bulk aluminum-graphene nanoplatelets composite by using friction stir alloying. Here, the novelty is shown through the method of graphene nanoplatelets incorporation in the stir zone. For th
Aluminium-based hybrid metal grid composites (MMC) are extensively utilized in automobile applications (engine cylinders, pistons, etc.) as they exhibit a fantastic blend of properties. Here, a detailed study of nano-mechanical, electrochemical and Raman spectroscopic behavior of friction stir processed Al6061-SiC-graphite hybrid surface composite is presented. The effect of various tool rotational speeds was evaluated along with the monitoring of variation in axial force. Microstructural change
Abstract A new combination of ionically conducting polymer–clay nanocomposites based on (PAN) 8 LiClO 4 + x wt % montmorillonite (unmodified) clay has been prepared using the standard solution cast process. X‐Ray diffraction (XRD) analysis reveals strong interaction of polymer salt complex (PS) with the montmorillonite matrix evidenced by changes in d 001 spacing of the clay and enhancement in the clay gallery width on composite formation possibly due to intercalation of polymer–salt complex int
