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<p>Magnesium alloys offer an exceptional strength-to-weight ratio, making them a revolutionary material for structural applications and are increasingly explored nowadays. A new ternary magnesium alloy with 1.5% Ca and 2% Zn was developed and further underwent friction stir processing (FSP) at different processing parameters of 1200 and 1400 rpm under different traverse speeds of 40, 60 and 80 mm/min. The FSP resulted in a fine and uniform distribution of the secondary phase particles in the processed zone, significantly enhancing the mechanical properties. The fractography analysis revealed dimples in the microstructure, indicating substantial plastic deformation before fracture. The alloy processed at 1400 rpm and 60&#xa0;mm/min traverse speed exhibited the optimum properties with a yield strength of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\sim 210\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>∼</mo> <mn>210</mn> </mrow> </math></EquationSource> </InlineEquation> MPa, ductility of 34% elongation, and microhardness of 101&#xa0;HV at room temperature. The EBSD analysis revealed a substantial grain refinement from ~ 35 to ~ 2 µm and an increase in the proportion of high-angle grain boundaries in the processed zone. The basal texture of the alloy was reduced, contributing to a significant enhancement in both strength (220%) and ductility (110%) as well as microhardness (60%) compared to the base alloy. The outstanding mechanical properties highlight the potential of the alloy for lightweight structural solutions.</p>

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Influence of Friction Stir Processing on the Mechanical and Microstructural Characteristics of Mg-1.5Ca-2Zn Ternary Alloy

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Sharath Babu,
  • S. Gangolu,
  • M. A. Joseph,
  • Mohammed Rashad

摘要

Magnesium alloys offer an exceptional strength-to-weight ratio, making them a revolutionary material for structural applications and are increasingly explored nowadays. A new ternary magnesium alloy with 1.5% Ca and 2% Zn was developed and further underwent friction stir processing (FSP) at different processing parameters of 1200 and 1400 rpm under different traverse speeds of 40, 60 and 80 mm/min. The FSP resulted in a fine and uniform distribution of the secondary phase particles in the processed zone, significantly enhancing the mechanical properties. The fractography analysis revealed dimples in the microstructure, indicating substantial plastic deformation before fracture. The alloy processed at 1400 rpm and 60 mm/min traverse speed exhibited the optimum properties with a yield strength of \(\sim 210\) ∼ 210 MPa, ductility of 34% elongation, and microhardness of 101 HV at room temperature. The EBSD analysis revealed a substantial grain refinement from ~ 35 to ~ 2 µm and an increase in the proportion of high-angle grain boundaries in the processed zone. The basal texture of the alloy was reduced, contributing to a significant enhancement in both strength (220%) and ductility (110%) as well as microhardness (60%) compared to the base alloy. The outstanding mechanical properties highlight the potential of the alloy for lightweight structural solutions.