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Title: Stress enhanced diffusion of krypton ions in polycrystalline titanium

An experimental investigation on the mutual influence of pre-existing residual stress and point defect following ion implantation is presented. The study has been carried out using polycrystalline titanium samples energetically implanted with krypton ions at different fluences. Ion beam analysis was used to determine the concentration profile of the injected krypton ions, while synchrotron X-ray diffraction has been used for stress determination. Ion beam analysis and synchrotron X-ray diffraction stress profile measurements of the implanted titanium samples show a clear evidence of stress-enhanced diffusion of krypton ions in titanium. It is further observed that for the titanium samples implanted at low fluence, ion implantation modifies the pre-existing residual stress through the introduction of point and open volume defects. The stress fields resulting from the ion implantation act to drift the krypton inclusions towards the surface of titanium.
Authors:
 [1] ;  [2] ;  [3] ; ;  [4]
  1. Department of Physics and Electronics, Rhodes University, Grahamstown 6140 (South Africa)
  2. School of Interdisciplinary Research and Graduate Studies, University of South Africa, Mucklenuek Campus, P O Box 392, UNISA 0003, Pretoria (South Africa)
  3. Laboratoire de Métallurgie Physique, UMR 6630 CNRS- Université de Poitiers, Bd M. et P. Curie, BP30179, 86962 Chasseneuil Futuroscope, Cedex (France)
  4. NanoSciences Innovation Center, Department of Physics, University of Cape Town, Rondebosch 7701 (South Africa)
Publication Date:
OSTI Identifier:
22308721
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONCENTRATION RATIO; CRYSTAL DEFECTS; DIFFUSION; INCLUSIONS; ION BEAMS; ION IMPLANTATION; KRYPTON IONS; POINT DEFECTS; POLYCRYSTALS; RESIDUAL STRESSES; STRESS ANALYSIS; SURFACES; SYNCHROTRON RADIATION; TITANIUM; X-RAY DIFFRACTION