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<p>In the current research, Aluminium 5083–8&#xa0;wt.% Boron Nitride composites were successfully developed using stir casting technique. The objective of this research is to evaluate the influence of high and low stirring time on the mechanical characteristics and microstructure of the composites that have been developed. The composites were fabricated at two stirring times, i.e. low (5&#xa0;min) and high (10&#xa0;min) to check the effect of stirring time on particles dispersion and interfacial bonding. The X-ray diffraction (XRD) pattern, obtained on the samples, confirmed peak phases for Al5083 matrix as well as BN reinforcement and absence of any undesirable secondary phase. Microstructural studies using scanning electron microscopy (SEM) indicated a relatively uniform distribution of BN particles and better matrix-reinforcement adherence at higher stirring time compared with slight particle clustering from samples fabricated at lower stirring time. The mechanical properties such as hardness, tensile strength, compressive strength and impact energy were determined. The hardness, tensile strength, compressive strength and impact energy of the composite fabricated at lower stirring time were found to be 85 HV, 219&#xa0;MPa, 315&#xa0;MPa and 15&#xa0;J respectively whereas in case of composite fabricated with higher stirring time showed an increment to 97 BHN (hardness), 241&#xa0;MPa (tensile strength), 350&#xa0;MPa (compressive strength), and 18&#xa0;J (impact energy). This is equal to 14.11% improvement in hardness, 10.04% improvement in tensile strength, 11.11% improvement in compressive strength and 20% improvement in impact energy respectively. This is equivalent to 14.11% improvement in hardness, 10.04% improvement in tensile strength, 11.11% improvement in compressive strength and 20% improvement in impact energy. The results confirmed that particle dispersion and mechanical properties were significantly improved with increased stirring time, thus highlighting the significance of a longer stirring time for achieving high performance Al5083-BN composites for advanced engineering applications.</p>

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Microstructure Characterization and Evaluation of Mechanical Properties of Al5083-Boron Nitride Composites at Low and High Stirring Time

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • T. K. Abhishek,
  • B. G. Avilasha,
  • Vishwanath Koti,
  • B. N. Deepak Kumar,
  • Kanneganti Jyothishya Brahma Chari,
  • D. Suresh Kumar,
  • N. R. Pradeep,
  • Maramreddy Raghu Tilak Reddy,
  • S. Udayashankar

摘要

In the current research, Aluminium 5083–8 wt.% Boron Nitride composites were successfully developed using stir casting technique. The objective of this research is to evaluate the influence of high and low stirring time on the mechanical characteristics and microstructure of the composites that have been developed. The composites were fabricated at two stirring times, i.e. low (5 min) and high (10 min) to check the effect of stirring time on particles dispersion and interfacial bonding. The X-ray diffraction (XRD) pattern, obtained on the samples, confirmed peak phases for Al5083 matrix as well as BN reinforcement and absence of any undesirable secondary phase. Microstructural studies using scanning electron microscopy (SEM) indicated a relatively uniform distribution of BN particles and better matrix-reinforcement adherence at higher stirring time compared with slight particle clustering from samples fabricated at lower stirring time. The mechanical properties such as hardness, tensile strength, compressive strength and impact energy were determined. The hardness, tensile strength, compressive strength and impact energy of the composite fabricated at lower stirring time were found to be 85 HV, 219 MPa, 315 MPa and 15 J respectively whereas in case of composite fabricated with higher stirring time showed an increment to 97 BHN (hardness), 241 MPa (tensile strength), 350 MPa (compressive strength), and 18 J (impact energy). This is equal to 14.11% improvement in hardness, 10.04% improvement in tensile strength, 11.11% improvement in compressive strength and 20% improvement in impact energy respectively. This is equivalent to 14.11% improvement in hardness, 10.04% improvement in tensile strength, 11.11% improvement in compressive strength and 20% improvement in impact energy. The results confirmed that particle dispersion and mechanical properties were significantly improved with increased stirring time, thus highlighting the significance of a longer stirring time for achieving high performance Al5083-BN composites for advanced engineering applications.