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Microstructural evolution and Bio-corrosion behavior of a CP-Ti processed by multi-pass of severe plastic deformation

Vakili Azghandi, M ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1007/s11837-022-05415-9
  3. Publisher: Springer , 2022
  4. Abstract:
  5. The microstructure evaluation and phase transformation of multi-pass friction stir-processed (FSP) commercially pure titanium were investigated using optical microscopy, scanning electron microscopy equipped with a backscatter detector, and electron backscatter diffractometer. The microstructure characterization shows that the grain refinement mechanism changed with the increasing number of passes. The equiaxed α grains in the untreated sample changed to lath-shaped grains surrounded by serrated grain boundaries, and produced Widmanstätten morphology during the cooling cycle of FSP. The higher micro-hardness values and bio-corrosion resistances of the FSP-treated samples are due to their lower grain size compared to the untreated samples. Furthermore, the presence of lath-shaped Widmanstätten morphology shows a higher micro-hardness value and lower bio-corrosion resistance. © 2022, The Minerals, Metals & Materials Society
  6. Keywords:
  7. Backscattering ; Corrosion resistance ; Corrosive effects ; Friction stir welding ; Grain boundaries ; Grain refinement ; Grain size and shape ; Microstructural evolution ; Morphology ; Scanning electron microscopy ; Textures ; Titanium compounds ; Commercially pure titanium ; Corrosion behaviour ; Friction stir ; Hardness values ; Micro-hardness ; Microstructure evaluations ; Multi-pass ; Phases transformation ; Severe plastic deformations ; Widmanstatten morphology ; Microhardness
  8. Source: JOM ; Volume 74, Issue 12 , 2022 , Pages 4621-4631 ; 10474838 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s11837-022-05415-9