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Improved Strength-Ductility of Ti-6Al-4V Casting Alloys with Trace Addition of TiC-TiB₂ Nanoparticles.

ABSTRACT: In this work, a high strength-ductility Ti64 cast alloy, containing trace TiC-TiB₂ nanoparticles, was fabricated by adding dual-phased nano-TiC-TiB₂/Al master alloys to the molten Ti64 alloys. The trace addition of the TiC-TiB₂ nanoparticles (0.1 wt%) simultaneously reduced the size of the ? grains, the ? laths, and the ? colony size of the lamellar structure during casting and suppressed the coarsening of the ? laths during heat treatment. The yield strength and the uniform elongation of TiC-TiB₂/Ti64 were increased by ~130 MPa and 2%, respectively. The simultaneously improved strength and ductility of the TiC-TiB₂/Ti64 were attributed to the decrease in the ? colony size of the lamellar structure, the significant refinement of the grains and ? laths, and the pinning effect of nanoparticles.

SUBMITTER: Zhu Y

PROVIDER: S-EPMC7760530 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Improved Strength-Ductility of Ti-6Al-4V Casting Alloys with Trace Addition of TiC-TiB2 Nanoparticles.

Zhu Yunlong Y Zhao Qinglong Q Liu Xiao X Geng Run R Wang Bao B Jiang Qichuan Q

Nanomaterials (Basel, Switzerland) 20201124 12

In this work, a high strength-ductility Ti64 cast alloy, containing trace TiC-TiB2 nanoparticles, was fabricated by adding dual-phased nano-TiC-TiB2/Al master alloys to the molten Ti64 alloys. The trace addition of the TiC-TiB2 nanoparticles (0.1 wt%) simultaneously reduced the size of the β grains, the α laths, and the α colony size of the lamellar structure during casting and suppressed the coarsening of the α laths during heat treatment. The yield strength and ...[more]

PMID: 33255496

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