The material removal and the nanometric surface characteristics formation mechanism of TiC/Ni cermet in ultra-precision grinding

Yandan Zhu, Quanli Zhang, Qingliang Zhao, Suet To

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

In this paper, the material removal mechanism of TiC/Ni cermet is firstly investigated based on the analysis of the nano-indentation and the diamond scratching test, and the grinding induced surface damage mechanics is then explored according to the surface topography, the surface morphology and the material microstructure analysis. The results show that the material removal experienced plastic deformation, plowing and fracture under the dynamic scratching process, where the material microstructure plays a determinant role on the obtained surface characteristics of the TiC/Ni cermet. To achieve a smooth surface and ductile material removal by the ultra-precision grinding process, a group of the machining parameters is selected to reveal the formed nanometric surface characteristics, where the dislodgement of the hard TiC particles and the surface relief formation were induced by the varied material removal rate between the binding phases and the TiC hard particle under the scratching of the diamond grits. In addition, the preferred TiC (200) crystalline plane in the ground surface layer appears for the interface fracture between the TiC grains and the rim structure, while the Ni (111) crystalline plane shows a preferred growth for the extrusion in the subsurface deformed layer.

Original languageEnglish
Article number105494
Number of pages8
JournalInternational Journal of Refractory Metals and Hard Materials
Volume96
DOIs
Publication statusPublished - Apr 2021

Keywords

  • Mechanical loading
  • Nanometric surface characteristic
  • Surface damage
  • TiC/Ni cermet

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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