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<p>In this study, laser-directed energy deposition technology was employed to fabricate WC/Monel alloy samples containing different proportions of coarse and fine WC particles. The results show that coarse WC particles effectively suppress the growth of columnar grains, promote the formation of equiaxed grains and also act as a hard skeleto, while fine WC particles contribute to further grain refinement through dissolution and the formation of eutectic carbides. Among all samples, the one with 6&#xa0;wt.% of both coarse and fine WC exhibited the highest hardness of 434.11 HV<sub>0.2</sub>, representing a 21.44% increase compared to the pure material. This composition also demonstrated the lowest wear volume and wear rate, indicating significantly improved wear resistance. The dual-scale synergistic effect of coarse and fine WC particles enhances the performance of Monel alloy.</p>

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Wear Resistance Enhancement of Monel Alloy via Dual-Scale Micron WC Reinforcement by Directed Energy Deposition

  • 期刊论文

  • 发表日期：

    2026年4月30日

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  • Jialiang Li,
  • Jichang Xie,
  • Zupeng Yan,
  • Jianbo Lei,
  • Tongchun Li

摘要

In this study, laser-directed energy deposition technology was employed to fabricate WC/Monel alloy samples containing different proportions of coarse and fine WC particles. The results show that coarse WC particles effectively suppress the growth of columnar grains, promote the formation of equiaxed grains and also act as a hard skeleto, while fine WC particles contribute to further grain refinement through dissolution and the formation of eutectic carbides. Among all samples, the one with 6 wt.% of both coarse and fine WC exhibited the highest hardness of 434.11 HV0.2, representing a 21.44% increase compared to the pure material. This composition also demonstrated the lowest wear volume and wear rate, indicating significantly improved wear resistance. The dual-scale synergistic effect of coarse and fine WC particles enhances the performance of Monel alloy.