Microstructural Characterisation and Analysis of Mechanical Behaviour of Hybrid AA 7075/7178 Fabricated Using Die Casting Technique

Open Access

Year : 2025 | Volume : 13 | Special Issue 01 | Page : 441 451
    By

    Colonel Anuj Bindra,

  • S. Gajanana,

  • Devesh Kumar,

  1. Research Scholar, Faculty of Engineering and Technology (FET), Poornima University, Jaipur, Rajasthan, India
  2. Professor and Dean Exam, Department of Mechanical Engineering, Maturi Venkata Subba Rao (MVSR) Engineering College, Hyderabad, Telangana, India
  3. Associate Professor and Head, Faculty of Engineering and Technology (FET), Poornima University, Jaipur, Rajasthan, India

Abstract

AA are being increasingly used in the field of structural engineering owing to their desirable mechanical properties coupled with their recyclable and sustainable nature, thus contributing significantly towards reduction of carbon footprints and development of circular economy. Till date numerous research projects have been prompted to investigate the structural performance of aluminium alloy structures and develop alternatives with enhanced performance parameters. AA 7xxx (Al-Zn-Mg-Cu) are being widely used in variety of engineering services owing to their high specific strength, hardness, corrosion performance, and machining performance. AA 7075 as well as AA 7178 remains dominant in aerospace industry ,compared to their steel counterparts.In this research work, a hybrid blend of AA 7075/7178 was fabricatedusing Die casting technique to  get an optimum composition that yields high strength material for structural purposes.Thesamples were subjected to mechanical testing such as Hardness,Ultimate tensiles strength, percentage elongation, yield strength. Analysis of micro structuralbehaviour and morphology such as grain refinement, grain boundary network was undertaken using scanning electron microscopic images with 100x and 500x magnification. The microstructure images of AA7075/7178 consists of Interdentric network of particles of CuAl2,NiAl3 and Mg2Si which indicates that the material has limited hardness and excellent tensile strength. Results indicated that the Hybrid blend with composition as  Zn – 7.3 %, Mg – 2.1 %, Cr  – 0.18 %, Cu – 2.4 %, Si – 0.4 % , Fe – 0.5 %, Ti – 0.2 % , Mn  – 0.3 % exhibited maximum tensile strength and moderate hardnessas compared with their base materials.Hence,it is an urgent requirement to develop next generation AA 7xxx alloys with enhanced strength, toughness and damage to resistance.

Keywords: Die Casting,AA 7075,AA7178,Tensile Testing, Microstructural Characterisation

[This article belongs to Special Issue under section in Journal of Polymer and Composites (jopc)]

How to cite this article:
Colonel Anuj Bindra, S. Gajanana, Devesh Kumar. Microstructural Characterisation and Analysis of Mechanical Behaviour of Hybrid AA 7075/7178 Fabricated Using Die Casting Technique. Journal of Polymer and Composites. 2024; 13(01):441-451.
How to cite this URL:
Colonel Anuj Bindra, S. Gajanana, Devesh Kumar. Microstructural Characterisation and Analysis of Mechanical Behaviour of Hybrid AA 7075/7178 Fabricated Using Die Casting Technique. Journal of Polymer and Composites. 2024; 13(01):441-451. Available from: https://journals.stmjournals.com/jopc/article=2024/view=187734


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Special Issue Open Access Original Research
Volume 13
Special Issue 01
Received 20/04/2024
Accepted 26/07/2024
Published 17/10/2024
Publication Time 180 Days
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