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<p>Engineering design application are improvised in recent decades with advancing studies in material design and fabrication such as composite materials. Metal matrix composite is one such material in which the material is designed by joining dissimilar material using friction stir welding. The present aims to investigate the mechanical, microstructural and fatigue properties of Friction Stir Welded (FSW) Metal Matrix Composite AA 6061-AZ31B Mg by incorporating heat treated biosilica. The main novelty of this study is how heat treated biosilica improves the material efficiency during friction stir welding. The biosilica is extracted from cassava peel waste through the process called thermo chemical and it is heat treated at 2500&#xa0;°C for 2&#xa0;h. The composite AA 6061-AZ31B Mgwas developed using stir casting process and welded using friction stir method. The study resulted that reinforcement of 3&#xa0;wt.% of filler particle into the composite AA2 (AA 6061-AZ31B Mg+3&#xa0;wt.% heat treated biosilica)shows best tensile strength, yield strength, impact energy, fatigue strength and reduced elongation of 286&#xa0;MPa, 243&#xa0;MPa, 22.1&#xa0;J, 184&#xa0;MPa and 5.4% and it is 19.16%, 27.89%, 36.41%, 33.34%, and 32.5% higher when compared to plain welded AA 6061-AZ31B Mgcomposite AA0 respectively. However, by increase in filler particle of 5&#xa0;wt.% in composite AA3(AA 6061-AZ31B Mg+3&#xa0;wt.% heat treated biosilica)shows reduced tensile strength, yield strength, impact strength, fatigue strength, elongation, while hardness strength gets improved of 128&#xa0;VHN. Further, the microstructure analysis offers valuable insights into how heat treated biosilica alters the microstructure of the base AA 6061-AZ31B MgMMCs and establishes its reinforcing capabilities. Because of its strength characteristics and the significance of joining two dissimilar materials, friction stir welding can be used in fields that require for complex structural design, such as bridge construction, automotive, marine shipbuilding, aviation, and infrastructure building construction.</p>

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Enhancement of mechanical, microstructural and fatigue properties of cassava tuber peel biosilica toughened dissimilar AA 6061-AZ31B Mg welds

  • 期刊论文

  • 发表日期：

    2025年4月4日

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  • G. Chakravarthi,
  • K. Giridharan,
  • S. Manoj Kumar,
  • N. S. Sivakumar

摘要

Engineering design application are improvised in recent decades with advancing studies in material design and fabrication such as composite materials. Metal matrix composite is one such material in which the material is designed by joining dissimilar material using friction stir welding. The present aims to investigate the mechanical, microstructural and fatigue properties of Friction Stir Welded (FSW) Metal Matrix Composite AA 6061-AZ31B Mg by incorporating heat treated biosilica. The main novelty of this study is how heat treated biosilica improves the material efficiency during friction stir welding. The biosilica is extracted from cassava peel waste through the process called thermo chemical and it is heat treated at 2500 °C for 2 h. The composite AA 6061-AZ31B Mgwas developed using stir casting process and welded using friction stir method. The study resulted that reinforcement of 3 wt.% of filler particle into the composite AA2 (AA 6061-AZ31B Mg+3 wt.% heat treated biosilica)shows best tensile strength, yield strength, impact energy, fatigue strength and reduced elongation of 286 MPa, 243 MPa, 22.1 J, 184 MPa and 5.4% and it is 19.16%, 27.89%, 36.41%, 33.34%, and 32.5% higher when compared to plain welded AA 6061-AZ31B Mgcomposite AA0 respectively. However, by increase in filler particle of 5 wt.% in composite AA3(AA 6061-AZ31B Mg+3 wt.% heat treated biosilica)shows reduced tensile strength, yield strength, impact strength, fatigue strength, elongation, while hardness strength gets improved of 128 VHN. Further, the microstructure analysis offers valuable insights into how heat treated biosilica alters the microstructure of the base AA 6061-AZ31B MgMMCs and establishes its reinforcing capabilities. Because of its strength characteristics and the significance of joining two dissimilar materials, friction stir welding can be used in fields that require for complex structural design, such as bridge construction, automotive, marine shipbuilding, aviation, and infrastructure building construction.