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Journal of Polymer & Composites Original Research Special issue Open Access

Fracture behavior of 2124Al- 10vol% SiCp composite tensile specimens for different heat treatment conditions

  1. T. Parameshwaran Pillai 1Department of Mechanical Engineering, University College of Engineering, BIT Campus, Tiruchirappalli
  2. K. S. Sajikumar Department of Mechanical Engineering, College of Engineering Trivandrum, Thiruvananthapuram
  3. K. Prasanth Kumar Reddy Department of Mechanical Engineering, Koneru Lakshmaiah Education Foundation (KLEF), Deemed to be University
  4. B. Nageswara Rao Department of Mechanical Engineering, Koneru Lakshmaiah Education Foundation (KLEF), Deemed to be University

Abstract

This article presents experimental details on 2124Al-10vol% SiCp composite tensile specimens, which were made by squeeze casting process. Cast metal composites are generally very brittle and have poor mechanical properties. To strengthen the matrix and improve ductility, the specimens were heat-treated by solutionizing and aging. Experiments were carried out at 3 different solutionizing temperatures, solutionizing time, aging temperature and aging time to examine the influence of heat treatment process parameters on the notched and unnotched tensile strength of the composite. Compact tension (CT) specimens with different crack lengths, crack mouth widths and thicknesses were tested to evaluate the fracture toughness of the composite. Experiments were planned according to the Taguchi’s L9 OA (orthogonal array). Factographs of tensile and CT specimens were made after the test using a scanning electron microscope (SEM). Energy dispersive X-ray analysis was carried out at different locations of the fractured specimens. The EDAX spectrum shows the chemical composition of inclusions and matrix components.

Keywords

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