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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 ($$N_F$$$ \sim$$$E_{MD}^b$$). 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:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1182917
Report Number(s):
PNNL-SA-101067
AT2030110
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Physics: Condensed Matter, 27(22):Article No. 225402
Additional Journal Information:
Journal Name: Journal of Physics: Condensed Matter, 27(22):Article No. 225402
Country of Publication:
United States
Language:
English
Subject:
displacement cascades; cascade morphology; morphology transition; fusion materials; tungsten

Citation Formats

Setyawan, Wahyu, Selby, A., 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, A., 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, A., Juslin, Niklas, Stoller, Roger E., Wirth, Brian D., and Kurtz, Richard J. Wed . "Cascade morphology transition in bcc metals". United States. doi:10.1088/0953-8984/27/22/225402.
@article{osti_1182917,
title = {Cascade morphology transition in bcc metals},
author = {Setyawan, Wahyu and Selby, A. 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$$ \sim$$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, 27(22):Article No. 225402},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {6}
}

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    Works referencing / citing this record:

    Effect of vacancies on the nucleation of Cr precipitates at grain boundary in α-Fe
    journal, August 2019

    • Dai, Y. Y.; Yang, L.; Nie, J. L.
    • Canadian Journal of Physics, Vol. 97, Issue 8
    • DOI: 10.1139/cjp-2018-0046