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Title: Radiation-induced extreme elastic and inelastic interactions in concentrated solid solutions

One of the biggest challenges in the radiation induced defect science is to understand the complex nature of ion-atom interactions under highly extreme conditions. Here, we report the irradiation induced non-equilibrium defect formation in NiCoCr single phase concentrated solid solution alloy due to (i) the extreme inelastic and (ii) the coupled inelastic and elastic ion-atom interactions. These two conditions are achieved at 5 and 30 μm penetration depths along the paths of swift heavy ions (1.542 GeV Bi). In general, the irradiation induced damage consists of interstitial-type dislocation loops and vacancy-type stacking fault tetrahedra (SFT). Near the surface (~5 μm) where electronic energy loss is dominating (~62.5 keV nm –1), the atomic motion primarily results in the formation of SFT. A noticeable increase of dislocation loop formation is observed at 30 μm near the maximum energy deposition from elastic interactions (~4.9 keV nm –1), as compared to the near surface region (~0.06 keV nm –1). As a result, insights on the complex electronic and atomic correlations of extreme energy deposition and dissipation on defect dynamics and structural stability may pave the way for new design principles of radiation–tolerant structural alloys.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4] ; ORCiD logo [1] ; ORCiD logo [5] ; ORCiD logo [6]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Chinese Academy of Sciences, Lanzhou (China)
  3. Australian National Univ., Canberra, ACT (Australia)
  4. GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany); Technische Univ. Darmstadt, Darmstadt (Germany)
  5. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Materials & Design
Additional Journal Information:
Journal Volume: 150; Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Concentrated solid solution alloys; Swift heavy ions; Ion-irradiation; Defects; Electronic energy-loss
OSTI Identifier:
1482460

Sachan, Ritesh, Ullah, Mohammad Wali, Chisholm, Matthew F., Liu, Jie, Zhai, Pengfei, Schauries, Daniel, Kluth, Patrick, Trautman, Christina, Bei, Hongbin, Weber, William J., and Zhang, Yanwen. Radiation-induced extreme elastic and inelastic interactions in concentrated solid solutions. United States: N. p., Web. doi:10.1016/j.matdes.2018.04.011.
Sachan, Ritesh, Ullah, Mohammad Wali, Chisholm, Matthew F., Liu, Jie, Zhai, Pengfei, Schauries, Daniel, Kluth, Patrick, Trautman, Christina, Bei, Hongbin, Weber, William J., & Zhang, Yanwen. Radiation-induced extreme elastic and inelastic interactions in concentrated solid solutions. United States. doi:10.1016/j.matdes.2018.04.011.
Sachan, Ritesh, Ullah, Mohammad Wali, Chisholm, Matthew F., Liu, Jie, Zhai, Pengfei, Schauries, Daniel, Kluth, Patrick, Trautman, Christina, Bei, Hongbin, Weber, William J., and Zhang, Yanwen. 2018. "Radiation-induced extreme elastic and inelastic interactions in concentrated solid solutions". United States. doi:10.1016/j.matdes.2018.04.011. https://www.osti.gov/servlets/purl/1482460.
@article{osti_1482460,
title = {Radiation-induced extreme elastic and inelastic interactions in concentrated solid solutions},
author = {Sachan, Ritesh and Ullah, Mohammad Wali and Chisholm, Matthew F. and Liu, Jie and Zhai, Pengfei and Schauries, Daniel and Kluth, Patrick and Trautman, Christina and Bei, Hongbin and Weber, William J. and Zhang, Yanwen},
abstractNote = {One of the biggest challenges in the radiation induced defect science is to understand the complex nature of ion-atom interactions under highly extreme conditions. Here, we report the irradiation induced non-equilibrium defect formation in NiCoCr single phase concentrated solid solution alloy due to (i) the extreme inelastic and (ii) the coupled inelastic and elastic ion-atom interactions. These two conditions are achieved at 5 and 30 μm penetration depths along the paths of swift heavy ions (1.542 GeV Bi). In general, the irradiation induced damage consists of interstitial-type dislocation loops and vacancy-type stacking fault tetrahedra (SFT). Near the surface (~5 μm) where electronic energy loss is dominating (~62.5 keV nm–1), the atomic motion primarily results in the formation of SFT. A noticeable increase of dislocation loop formation is observed at 30 μm near the maximum energy deposition from elastic interactions (~4.9 keV nm–1), as compared to the near surface region (~0.06 keV nm–1). As a result, insights on the complex electronic and atomic correlations of extreme energy deposition and dissipation on defect dynamics and structural stability may pave the way for new design principles of radiation–tolerant structural alloys.},
doi = {10.1016/j.matdes.2018.04.011},
journal = {Materials & Design},
number = C,
volume = 150,
place = {United States},
year = {2018},
month = {4}
}