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Additive manufacturingAdditive manufacturing of aluminum alloyAluminum alloy matrix compositesComposite containing scandiumScandium  (Sc) and in-situ TiB2 and TiC particles results in improved mechanical propertiesMechanical properties. The improvement is attributed to enhanced nucleation of aluminumAluminum grains during solidificationSolidification and the uniformUniform dispersion of the reinforcing particles. Laser powder bed fusionLaser powder bed fusion alters the reinforcing particles and promotes the nucleation of aluminumAluminum grains in the melt pool under a high cooling rateCooling rate. Refining the reinforcing particles and aluminumAluminum grains leads to the increase of yield strength (YS) to 425 MPa and ultimate tensile strengthTensile strength (UTS) to 475 MPa while maintaining an elongation of 16% for Al–Mg reinforced with TiC particles, while to 370 MPa YS, 450 MPa UTS, and an elongation of 7% for anAl-Mg, Al-Cu Al-Cu reinforced with TiB2 particles. A good combination of strength and ductility has been achieved through laser powder bed fusionLaser powder bed fusion.

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Scandium in the Additive Manufacturing of In-Situ TiB2 and TiC Particle Reinforced Aluminum Alloy Composites for Improved Mechanical Properties

  • 会议论文

  • 发表日期：

    2025年

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  • Huan Li,
  • Xiaoming Wang,
  • Xinghang Zhang,
  • Tao Wang,
  • Jerome Fourmann,
  • Paul Rometsch

摘要

Additive manufacturingAdditive manufacturing of aluminum alloyAluminum alloy matrix compositesComposite containing scandiumScandium  (Sc) and in-situ TiB2 and TiC particles results in improved mechanical propertiesMechanical properties. The improvement is attributed to enhanced nucleation of aluminumAluminum grains during solidificationSolidification and the uniformUniform dispersion of the reinforcing particles. Laser powder bed fusionLaser powder bed fusion alters the reinforcing particles and promotes the nucleation of aluminumAluminum grains in the melt pool under a high cooling rateCooling rate. Refining the reinforcing particles and aluminumAluminum grains leads to the increase of yield strength (YS) to 425 MPa and ultimate tensile strengthTensile strength (UTS) to 475 MPa while maintaining an elongation of 16% for Al–Mg reinforced with TiC particles, while to 370 MPa YS, 450 MPa UTS, and an elongation of 7% for anAl-Mg, Al-Cu Al-Cu reinforced with TiB2 particles. A good combination of strength and ductility has been achieved through laser powder bed fusionLaser powder bed fusion.