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Title: Cascade morphology transition in bcc metals

Abstract

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:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1336581
Grant/Contract Number:  
AC05-00OR22725
Resource 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
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

Citation Formats

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., 2015. 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. https://doi.org/10.1088/0953-8984/27/22/225402
Setyawan, Wahyu, Selby, Aaron P., Juslin, Niklas, Stoller, Roger E., Wirth, Brian D., and Kurtz, Richard J.. Mon . "Cascade morphology transition in bcc metals". United States. https://doi.org/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 = {Mon May 18 00:00:00 EDT 2015},
month = {Mon May 18 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 33 works
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Figures / Tables:

FIG. 1 FIG. 1: a) The irreducible part of the crystal directions and the grid points for the PKA directions. The grids are constructed with a Miller index increment of 1/24 resulting in a total of 325 points. b) The number of equivalent directions of each point is shown as the numbermore » following the x character given in parentheses.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.