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<p>In this study, the effects of the addition amounts of rare earth element Ce (0, 0.2, 0.4, and 0.6wt.%) and heat treatment on the microstructure and properties of 6101 aluminum alloy were investigated. XRD, SEM, and EBSD analytical techniques were employed, along with room temperature tensile tests and electrical conductivity measurements. The results show that an appropriate amount of Ce induces grain refinement in the as-cast 6101 aluminum alloy and improves the morphology and composition of deleterious iron-rich phases. After rolling deformation followed by solution treatment and aging treatment, both the mechanical properties and electrical conductivity of the alloy were enhanced. The Ce0.2 alloy exhibits the optimal effect in terms of the refinement of recrystallized grains, while rare earth Ce reduces electron scattering caused by impurity atoms. To achieve a balance between mechanical properties and electrical conductivity, the addition of Ce (0.2wt.%) combined with heat treatment parameters of 540&#xa0;°C/30&#xa0;min + 180&#xa0;°C/10&#xa0;h was established as the optimal process. Under these conditions, the tensile strength was 244&#xa0;MPa, the hardness was 90.6HV, and the electrical conductivity reached 56.52%IACS.</p>

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Effect of Rare Earth Ce and Heat Treatment on the Microstructure and Properties of 6101 Aluminum Alloy

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Fuwei Kang,
  • Linlin Zhang,
  • Enhao Wang,
  • Shilei Liu,
  • Na Zhao,
  • Bingpeng Zhang,
  • Deshuo Kong

摘要

In this study, the effects of the addition amounts of rare earth element Ce (0, 0.2, 0.4, and 0.6wt.%) and heat treatment on the microstructure and properties of 6101 aluminum alloy were investigated. XRD, SEM, and EBSD analytical techniques were employed, along with room temperature tensile tests and electrical conductivity measurements. The results show that an appropriate amount of Ce induces grain refinement in the as-cast 6101 aluminum alloy and improves the morphology and composition of deleterious iron-rich phases. After rolling deformation followed by solution treatment and aging treatment, both the mechanical properties and electrical conductivity of the alloy were enhanced. The Ce0.2 alloy exhibits the optimal effect in terms of the refinement of recrystallized grains, while rare earth Ce reduces electron scattering caused by impurity atoms. To achieve a balance between mechanical properties and electrical conductivity, the addition of Ce (0.2wt.%) combined with heat treatment parameters of 540 °C/30 min + 180 °C/10 h was established as the optimal process. Under these conditions, the tensile strength was 244 MPa, the hardness was 90.6HV, and the electrical conductivity reached 56.52%IACS.