Microstructural, Dynamic and Residual Stress Analysis of Metal Matrix Composite Shafts
- PDF / 8,885,323 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 32 Downloads / 198 Views
ORIGINAL ARTICLE
Microstructural, Dynamic and Residual Stress Analysis of Metal Matrix Composite Shafts Anuj Sharma1 • Vikas Rastogi1 • Atul Kumar Agrawal1
Received: 6 January 2020 / Accepted: 28 September 2020 The Indian Institute of Metals - IIM 2020
Abstract Metal matrix shafts are widely used in industries, and various research works are available for the characterization and applications of these components. These research works are limited to the conventional characterization of the material. In this paper, a novel characterization approach has been adopted, which determines the effect of reinforcements on the dynamic properties and residual stress of the Al 6061/Al2O3 shafts. Long and slender shafts were fabricated through a stir casting process. Grain structure was obtained through optical microscopy, and morphological evaluation of the composites was performed through scanning electron microscopy. In addition, X-ray diffraction patterns were analysed, and residual stress was calculated by X-ray residual stress measurement system l-X360 Ver. 2.3.0.1. Tensile residual stress was observed for pure Al 6061 alloy shaft on the surface of shafts, whereas compressive residual stress was observed in the case of composite shafts. The magnitude of the compressive residual stress increased with the increased wt% of alumina in the Al 6061 matrix. The amplitudes of vibration were also reduced by the introduction of reinforcements in metal matrix composites. Keywords Residual stress Metal matrix composite (MMC) Scanning electron microscopy (SEM) X-ray diffraction (XRD) Dynamic response
& Anuj Sharma [email protected] 1
Department of Mechanical, Production, Industrial and Automobile Engineering, Delhi Technological University, Delhi 110042, India
1 Introduction Various sectors of industries such as automobile, aerospace and defence are shifting their focus towards lightweight materials to attain high energy efficiency. Metal matrix composites are the materials which possess better mechanical properties than their parent materials. Aluminium matrix composites (AMCs) are used by various industries in different domains of applications. Since these composites have higher specific modulus than the parent materials, AMCs are used as rotary components such as drive shafts and brake rotors. Various components such as cylinder piston, driveshafts and connecting rods have been manufactured by various manufacturers such as Toyota, GKN and GM [1–3]. Also, there are some specific examples for the application of Al 6061/Al2O3 composites. As for example, the drive shaft of Al 6061/Al2O3 composite has been manufactured by extrusion of stir cast billets [4]. Stir casting is a simple, flexible and low-cost method which is generally used for the fabrication of AMCs. The adaptability of this method with the conventional foundry method makes it an economical and viable method for manufacturing the metal matrix composites [5, 6]. Although, wettability and homogeneity of the solid reinforcement are essential factors t
Data Loading...
