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<p>The influence of protrusion geometry on the microstructure and mechanical properties of AA2219 fabricated by AFSD was studied thoroughly, via constructing a 14-layer deposit. The results demonstrate that the deposit using four protrusions exhibits a higher tensile elongation yet a lower mechanical strength than that using two protrusions along the build direction. Besides, the four protrusions can promote the mixing of interlayer materials and greatly improve the interlayer bonding between the deposited layers, rather than forming a continuous interlayer interface using the two protrusions. The lower mechanical strength via four protrusions is associated with the longer heat treatment during the deposition process, compared to two protrusions. This study will provide insights for additive manufacturing of large-scale Al component.</p>

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Influence of protrusion geometry on the microstructure and mechanical properties of AA2219 fabricated by additive friction stir deposition

  • 期刊论文

  • 发表日期：

    2025年2月15日

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  • Ming Zhang,
  • Ruilin Lai,
  • Yidi Li,
  • Hui Wang,
  • Biaobiao Yang,
  • Yunping Li

摘要

The influence of protrusion geometry on the microstructure and mechanical properties of AA2219 fabricated by AFSD was studied thoroughly, via constructing a 14-layer deposit. The results demonstrate that the deposit using four protrusions exhibits a higher tensile elongation yet a lower mechanical strength than that using two protrusions along the build direction. Besides, the four protrusions can promote the mixing of interlayer materials and greatly improve the interlayer bonding between the deposited layers, rather than forming a continuous interlayer interface using the two protrusions. The lower mechanical strength via four protrusions is associated with the longer heat treatment during the deposition process, compared to two protrusions. This study will provide insights for additive manufacturing of large-scale Al component.