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<p>In this study, three laminated composites by combining two aluminium alloy AA1050 and AA6061, <i>i.e.</i>, AA1050/AA1050, AA6061/AA6061, and AA1050/AA6061, were fabricated by accumulative roll-bonding (ARB). After 5-ARB process, annealing at 100&#xa0;°C, 150&#xa0;°C, 200&#xa0;°C, and 300&#xa0;°C for 30 minutes was applied to these three composites. The ARB-processed and annealed microstructure was characterized using transmission electron microscopy (TEM). The through-thickness microhardness and tensile testing were conducted to measure the mechanical properties after ARB and annealing. The microstructure and mechanical properties were correlated. The microstructure was quickly refined after 1-ARB, which resulted in fast increased hardness and tensile strength at the cost of sharp drop of ductility. The grain refinement was slowed with further increasing strain after 1-ARB, and the tensile strength and ductility increased slightly and almost remained unchanged, respectively. The microstructure coarsening and mechanical property improvement were observed after annealing at 100&#xa0;°C, 150&#xa0;°C and then apparent change at 300&#xa0;°C. In AA1050/AA6061, plastic instability occurred at bonded interfaces due to the strength/ductility mismatch between AA1050 and AA6061, and the plastic instability degraded the overall tensile strength. It was found that annealing helped to heal the plastic instability and enhanced the mechanical properties of AA1050/AA6061 by reducing the strength between AA1050 and AA6061.</p>

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Microstructure, Mechanical Properties, and Fracture Behaviors of Aluminum Alloys 1050 and 6061 After Accumulative Roll-Bonding (ARB) and Subsequent Annealing

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Rui Wang,
  • Shunjie Yao,
  • Lihong Su,
  • Junjie Zeng,
  • Yu Liu,
  • Haibiao Tu,
  • Hui Wang

摘要

In this study, three laminated composites by combining two aluminium alloy AA1050 and AA6061, i.e., AA1050/AA1050, AA6061/AA6061, and AA1050/AA6061, were fabricated by accumulative roll-bonding (ARB). After 5-ARB process, annealing at 100 °C, 150 °C, 200 °C, and 300 °C for 30 minutes was applied to these three composites. The ARB-processed and annealed microstructure was characterized using transmission electron microscopy (TEM). The through-thickness microhardness and tensile testing were conducted to measure the mechanical properties after ARB and annealing. The microstructure and mechanical properties were correlated. The microstructure was quickly refined after 1-ARB, which resulted in fast increased hardness and tensile strength at the cost of sharp drop of ductility. The grain refinement was slowed with further increasing strain after 1-ARB, and the tensile strength and ductility increased slightly and almost remained unchanged, respectively. The microstructure coarsening and mechanical property improvement were observed after annealing at 100 °C, 150 °C and then apparent change at 300 °C. In AA1050/AA6061, plastic instability occurred at bonded interfaces due to the strength/ductility mismatch between AA1050 and AA6061, and the plastic instability degraded the overall tensile strength. It was found that annealing helped to heal the plastic instability and enhanced the mechanical properties of AA1050/AA6061 by reducing the strength between AA1050 and AA6061.