ZHANG Wenshu, WEI Chen, LI Bing, REN Yong, MIN Jin, CHANG Hui, ZHOU Lian. Microstructure and Properties of Laser Direct Manufacturing TC4 Alloy Reinforced by B4C with Different Micro/Nano Particle Ratios[J]. Development and Application of Materials, 2024, 39(4): 10-17.
Citation: ZHANG Wenshu, WEI Chen, LI Bing, REN Yong, MIN Jin, CHANG Hui, ZHOU Lian. Microstructure and Properties of Laser Direct Manufacturing TC4 Alloy Reinforced by B4C with Different Micro/Nano Particle Ratios[J]. Development and Application of Materials, 2024, 39(4): 10-17.

Microstructure and Properties of Laser Direct Manufacturing TC4 Alloy Reinforced by B4C with Different Micro/Nano Particle Ratios

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  • Received Date: November 27, 2023
  • Available Online: September 11, 2024
  • The reinforced TC4 matrix composites are fabricated by adding 3% (mass friction) B4C particles by the laser direct manufacturing (LDM) technology. The B4C particles with diameters of 50 μm and 50 nm are mixed with the TC4 particles, and the reinforced TC4 alloys are prepared by LDM technology, with the mass fraction ratios of the micro and nano B4C particles are 1%∶2%, 1%∶1%, and 2%∶1%. The microstructures and hardness of the reinforced TC4 alloy with different ratios of micro-nano B4C particles are investigated. The results show that the microstructure of the TC4 alloy is significantly refined after adding B4C reinforcing phase. The content of B4C particles with different sizes can affect the crystallinity and grain size of the second phase TiB and TiC. When the content of the nano-B4C particles is higher, the TiC crystallinity is better, and the TiB phase is embedded in the TC4 crystal as nano-sized particles. When the contents of micro- and nano- B4C particles are similar, the TC4 matrix has the highest microhardness, so do the the TiB and TiC in the second phase region. Besides, the TiB phase has high crystallinity and large grain size.
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