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Title: Cascade morphology transition in bcc metals

Energetic atom collisions in solids induce shockwaves with complex morphologies. In this paper, we establish the existence of a morphological transition in such cascades. The order parameter of the morphology is defined as the exponent, b, in the defect production curve as a function of cascade energy (N-F similar to E-MD(b)). Response of different bcc metals can be compared in a consistent energy domain when the energy is normalized by the transition energy, mu, between the high-and the low-energy regime. Using Cr, Fe, Mo and W data, an empirical formula of mu as a function of displacement threshold energy, E-d, is presented for bcc metals.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 27; Journal Issue: 22; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
displacement cascade; morphology transition; threshold energy; morphology classification; sub-cascade; molecular dynamics simulation; tungsten molybdenum iron chromium; MOLECULAR-DYNAMICS SIMULATION; ENERGY DISPLACEMENT CASCADES; PRIMARY DAMAGE FORMATION
OSTI Identifier:
1336581

Setyawan, Wahyu, Selby, Aaron P., Juslin, Niklas, Stoller, Roger E., Wirth, Brian D., and Kurtz, Richard J.. Cascade morphology transition in bcc metals. United States: N. p., Web. doi:10.1088/0953-8984/27/22/225402.
Setyawan, Wahyu, Selby, Aaron P., Juslin, Niklas, Stoller, Roger E., Wirth, Brian D., & Kurtz, Richard J.. Cascade morphology transition in bcc metals. United States. doi:10.1088/0953-8984/27/22/225402.
Setyawan, Wahyu, Selby, Aaron P., Juslin, Niklas, Stoller, Roger E., Wirth, Brian D., and Kurtz, Richard J.. 2015. "Cascade morphology transition in bcc metals". United States. doi:10.1088/0953-8984/27/22/225402. https://www.osti.gov/servlets/purl/1336581.
@article{osti_1336581,
title = {Cascade morphology transition in bcc metals},
author = {Setyawan, Wahyu and Selby, Aaron P. and Juslin, Niklas and Stoller, Roger E. and Wirth, Brian D. and Kurtz, Richard J.},
abstractNote = {Energetic atom collisions in solids induce shockwaves with complex morphologies. In this paper, we establish the existence of a morphological transition in such cascades. The order parameter of the morphology is defined as the exponent, b, in the defect production curve as a function of cascade energy (N-F similar to E-MD(b)). Response of different bcc metals can be compared in a consistent energy domain when the energy is normalized by the transition energy, mu, between the high-and the low-energy regime. Using Cr, Fe, Mo and W data, an empirical formula of mu as a function of displacement threshold energy, E-d, is presented for bcc metals.},
doi = {10.1088/0953-8984/27/22/225402},
journal = {Journal of Physics. Condensed Matter},
number = 22,
volume = 27,
place = {United States},
year = {2015},
month = {5}
}