Deformation behavior and microstructure evolution in thermal-aided mesoforming of titanium dental abutment

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17 Citations (Scopus)

Abstract

With the increasing demand for meso/micro-scaledmedical products made of biocompatiblematerials, thermalaidedmesoforming is proposed to improvematerial formability and homogenize flow behavior of materials that are difficult to deform at room temperature. However, the unique material deformation behavior and the interactive effects of material microstructure and deformation temperature on forming quality of the fabricated micropart remain unknown. This study thus aims at addressing this issue in thermalmesoforming in terms of deformation load, material flow,microstructural evolution, dimensional accuracy, and defect formation. Accordingly, the fabrication of a titanium dental abutment by one-stroke mesoforming at elevated temperature is conducted and explored. The characteristic and quality of the mesoformed part are extensively examined. The surface grains on the square extrudate undergo severe deformation and generate an equiaxed structure, reflecting that mesoforming at elevated temperature facilitates the homogenization of material flow without coarsening grain size. In addition, the dimensional accuracy, surface quality and the sizes of burr and flash are associated with the initial grain size of pure titanium, and the surface finish is improved by using fine-grained titanium. The fine-grained material is thus desirable for achieving the optimal surface quality in the thermal-aided mesoformed parts.
Original languageEnglish
Pages (from-to)1283-1293
Number of pages11
JournalMaterials and Design
Volume89
DOIs
Publication statusPublished - 5 Jan 2016

Keywords

  • Dental implant
  • Material flow
  • Microstructure evolution
  • Pure titanium
  • Thermal-aided mesoforming

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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