Materials Research Letters (Aug 2022)

Enhanced mechanical properties of Ti6Al4V alloy fabricated by laser additive manufacturing under static magnetic field

  • Ruixin Zhao,
  • Chaoyue Chen,
  • Sansan Shuai,
  • Tao Hu,
  • Yves Fautrelle,
  • Hanlin Liao,
  • Jian Lu,
  • Jiang Wang,
  • Zhongming Ren

DOI
https://doi.org/10.1080/21663831.2022.2064195
Journal volume & issue
Vol. 10, no. 8
pp. 530 – 538

Abstract

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This study introduced a novel magnetic-field regulation method in metallic additive manufacturing to achieve the refined grain structure and enhanced mechanical properties without post-treatment and composition changes. As a showcase material, the Ti6Al4V alloy was fabricated using direct energy deposition under the static magnetic field (SMF). It is found that the transverse SMF of 0.55 T can effectively regulate the microstructure with twisted prior-β grains (strong orientation to weak orientation) and discontinuous α grain boundaries. The tensile test shows a significant improvement of tensile elongation (εf) in both longitudinal and transverse directions with a slight strength decrease.

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