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Microstructure and Wear-resistant Properties of the in situ TiB-TiC Reinforced Titanium Matrix Composites by Laser Deposition Manufacturing
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School of Mechatronics Engineering,Shenyang Aerospace University,School of Mechatronics Engineering,Shenyang Aerospace University,,Institute for New Materials,Nanjing Tech University

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    Abstract:

    The TiB-TiC Reinforced Titanium matrix composites (TMCs) were manufactured by Laser Deposition Manufacturing (LDM) technique with the ball milled TA15+B4C powders with different compositions of B and C elements. The microstructure and wear-resistant properties of the prepared TMCs were studied by XRD, SEM, EDS, hardness test and wear resistance test. The obtained results revealed that in the prepared TMCs, there were two types of the reinforcement, namely the TiC reinforcement with the near-equiaxed shape and the TiB reinforcement with the whisker or prismatic shape. With the increase in the reinforcement content, the hardness of TMCs improved, the friction coefficient might be unchangable and the wear mass loss increased first and then decreased. Compared with the substrate, the TMC containing 1.2 wt% boron and 0.84 wt % carbon showed better wear-resistant properties. The wear mechanism of the prepared TMCs involved the abrasive wear and a small amount of oxidation wear.

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[He Bo, Lan Jiaojiao, Yang Guang, Wei Hua. Microstructure and Wear-resistant Properties of the in situ TiB-TiC Reinforced Titanium Matrix Composites by Laser Deposition Manufacturing[J]. Rare Metal Materials and Engineering,2017,46(12):3805~3810.]
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History
  • Received:September 29,2016
  • Revised:September 29,2016
  • Adopted:December 07,2016
  • Online: January 04,2018
  • Published: