Articles
  • Microstructure and mechanical behaviour of graphene reinforced friction stir welded joint of nickel-based superalloy Incoloy 925

  • Varalakshmi Penugondaa,b,*, S. Sudhakar Babua and B. Vijaya Kumarb

  • aDepartment of Mechanical Engineering, Koneru Lakshmaiah Education Foundation, Guntur Andhra Pradesh, 522502, India
    bDepartment of Mechanical Engineering, Guru Nanak Institute of Technology, Hyderabad, Telangana, 501506, India

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effect of reinforcement strategy on graphene nanoparticles distribution in terms of metallurgical and mechanical properties of Incoloy 925 alloy friction stir welding was investigated. The friction stir welding was performed at different welding speeds (20-100 mm/min) and tool rotational speeds (300-500 rpm) using a tapered pin tool. The defect-free welds were obtained at a tool rotational speed of 400 rpm, and welding speeds of 20 mm/min, 30 mm/min, and 40 mm/min, respectively. The cross-sectional microstructure of the weld joints was characterized by SEM and EDX and revealed that graphene particles were evenly distributed inside the nugget zone. Results achieved through Raman spectrometry analysis confirmed the presence of graphene. Because graphene was distributed consistently across the nugget zone, the microhardness of the material has grown to around 320 HV. In comparison to the base metal, the microhardness of the graphene-reinforced Incoloy 925 stir zone was found to be 51 percent higher. Compared to the base metal, the friction stir weld joints exhibited a high joint efficiency (ranging from 90% to 97.5%).


Keywords: Friction stir welding, Incoloy 925, Graphene nanoparticles, Microstructure, Mechanical properties

This Article

  • 2023; 24(2): 250-256

    Published on Apr 30, 2023

  • 10.36410/jcpr.2023.24.2.250
  • Received on Aug 4, 2022
  • Revised on Oct 18, 2022
  • Accepted on Nov 17, 2022

Correspondence to

  • Varalakshmi Penugonda

  • aDepartment of Mechanical Engineering, Koneru Lakshmaiah Education Foundation, Guntur Andhra Pradesh, 522502, India
    bDepartment of Mechanical Engineering, Guru Nanak Institute of Technology, Hyderabad, Telangana, 501506, India
    Tel : +91-863-239-9999 Fax: +91-863-238-8999

  • E-mail: me2010.varam@gmail.com