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Title: Self-ion irradiation effects on mechanical properties of nanocrystalline zirconium films

Zirconium thin films were irradiated at room temperature with an 800 keV Zr + beam using a 6 MV HVE Tandem accelerator to 1.36 displacement per atom damage. Freestanding tensile specimens, 100 nm thick and 10 nm grain size, were tested in-situ inside a transmission electron microscope. Significant grain growth (>300%), texture evolution, and displacement damage defects were observed. Here, stress-strain profiles were mostly linear elastic below 20 nm grain size, but above this limit the samples demonstrated yielding and strain hardening. Experimental results support the hypothesis that grain boundaries in nanocrystalline metals act as very effective defect sinks.
Authors:
 [1] ;  [1] ;  [2] ;  [3]
  1. Pennsylvania State Univ., University Park, PA (United States)
  2. Purdue Univ., West Lafayette, IN (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2017-7604J
Journal ID: ISSN 2159-6859; applab; 655493
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
MRS Communications
Additional Journal Information:
Journal Volume: 7; Journal Issue: 3; Journal ID: ISSN 2159-6859
Publisher:
Materials Research Society - Cambridge University Press
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; radiation effects; grain size; transmission electron microscopy (TEM); stress/strain relationship
OSTI Identifier:
1373291

Wang, Baoming, Haque, M. A., Tomar, Vikas, and Hattar, Khalid. Self-ion irradiation effects on mechanical properties of nanocrystalline zirconium films. United States: N. p., Web. doi:10.1557/mrc.2017.51.
Wang, Baoming, Haque, M. A., Tomar, Vikas, & Hattar, Khalid. Self-ion irradiation effects on mechanical properties of nanocrystalline zirconium films. United States. doi:10.1557/mrc.2017.51.
Wang, Baoming, Haque, M. A., Tomar, Vikas, and Hattar, Khalid. 2017. "Self-ion irradiation effects on mechanical properties of nanocrystalline zirconium films". United States. doi:10.1557/mrc.2017.51. https://www.osti.gov/servlets/purl/1373291.
@article{osti_1373291,
title = {Self-ion irradiation effects on mechanical properties of nanocrystalline zirconium films},
author = {Wang, Baoming and Haque, M. A. and Tomar, Vikas and Hattar, Khalid},
abstractNote = {Zirconium thin films were irradiated at room temperature with an 800 keV Zr+ beam using a 6 MV HVE Tandem accelerator to 1.36 displacement per atom damage. Freestanding tensile specimens, 100 nm thick and 10 nm grain size, were tested in-situ inside a transmission electron microscope. Significant grain growth (>300%), texture evolution, and displacement damage defects were observed. Here, stress-strain profiles were mostly linear elastic below 20 nm grain size, but above this limit the samples demonstrated yielding and strain hardening. Experimental results support the hypothesis that grain boundaries in nanocrystalline metals act as very effective defect sinks.},
doi = {10.1557/mrc.2017.51},
journal = {MRS Communications},
number = 3,
volume = 7,
place = {United States},
year = {2017},
month = {7}
}