New Ti/β-Ti alloy laminated composite processed by powder metallurgy: Microstructural evolution and mechanical property

Weidong Zhang, Peng Yang, Yuankui Cao, Xi Li, Daixiu Wei, Hidemi Kato, Zhenggang Wu

Research output: Contribution to journalArticlepeer-review

Abstract

Pure Ti shows promising performance for biomedical applications, but its strength needs to be greatly improved when used as heavy-load implants. In this work, β-Ti alloy was used as the reinforced layer to prepare Ti/β-Ti alloy laminated composite through Spark Plasma Sintering (SPS) with hot/cold rolling and partial recrystallization annealing. The microstructural evolution of Ti layer, β-Ti alloy layer and the interface between them during the fabrication process was investigated. The results showed the composite comprises alternating recrystallized Ti layer, β-Ti alloy layer with deformed microstructure, and α+β dual phase interface layer containing submicron sized rod-like or granular α phase. Besides, the deformation behavior and mechanical properties of the Ti/β-Ti alloy laminate composite were studied. The Ti/β-Ti alloy laminate composite after partial recrystallization annealing shows a good match of high strength and good ductility (tensile strength: 832 MPa and uniform elongation: 20%), owing to the co-work of the diffusion interface layer and the constraint effect. The α+β dual phase layer has an important effect on weakening the deformation incompatibility between Ti layer and β-Ti alloy layer and preventing crack propagation during the tensile deformation.

Original languageEnglish
Article number141702
JournalMaterials Science and Engineering A
Volume822
DOIs
Publication statusPublished - 2021 Aug 3

Keywords

  • Interfacial structure
  • Laminated composite
  • Spark plasma sintering (SPS)
  • β-Ti alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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