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<p>The wire-powder hybrid additive manufacturing (WP-HAM) is composed of the wire arc additive manufacturing (WAAM) and laser powder feeding equipment. In the WP-HAM, through altering the powder feeding rate to change the TiC content of incorporated into the experiments, the changes of TiC-reinforced titanium matrix composites (TMCs) in microstructure and mechanical properties under different powder feeding rates were investigated. The results show that, when the powder feeding rate increases from 1 revolutions per minute (rpm) to 3&#xa0;rpm, the height and width of the deposited layer gradually increase. Meanwhile, the phase composition of the deposited layer is consisted of α phase and β phase all the time. The [0001] direction texture of the α phase gradually diminishes, from 20.15 to 10.21. And the average grain size of the α phase and the average microhardness of the deposited layer have both in direct proportion with the powder feeding rate. The maximum microhardness obtained by the powder feeding rate of 3 rpm can reach 415.02 HV owing to adding TiC powder. Because the microhardness of TiC powder itself is very high and unmelted powder will increase the microhardness.</p>

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Effect of Powder Feeding Rate on the Microstructure and Mechanical Properties of TiC-Reinforced Titanium Matrix Composites during Wire-Powder Hybrid Additive Manufacturing

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Yao Meng,
  • Yiping Shen,
  • Jun He,
  • Aijie Xu,
  • Guorui Sun,
  • Wenlong Li,
  • Chuanchuan Jia,
  • Mengying Zhang,
  • Xiaohui Zhao,
  • Yuangeng Wang,
  • Chao Chen

摘要

The wire-powder hybrid additive manufacturing (WP-HAM) is composed of the wire arc additive manufacturing (WAAM) and laser powder feeding equipment. In the WP-HAM, through altering the powder feeding rate to change the TiC content of incorporated into the experiments, the changes of TiC-reinforced titanium matrix composites (TMCs) in microstructure and mechanical properties under different powder feeding rates were investigated. The results show that, when the powder feeding rate increases from 1 revolutions per minute (rpm) to 3 rpm, the height and width of the deposited layer gradually increase. Meanwhile, the phase composition of the deposited layer is consisted of α phase and β phase all the time. The [0001] direction texture of the α phase gradually diminishes, from 20.15 to 10.21. And the average grain size of the α phase and the average microhardness of the deposited layer have both in direct proportion with the powder feeding rate. The maximum microhardness obtained by the powder feeding rate of 3 rpm can reach 415.02 HV owing to adding TiC powder. Because the microhardness of TiC powder itself is very high and unmelted powder will increase the microhardness.