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Title: Point Defect Cluster Formation in Iron Displacement Cascades Up to 50 keV

Abstract

The results of molecular dynamics displacement cascade simulations in iron at energies up to 50 keV and temperatures of 100, 600, and 900K are summarized, with a focus on the characterization of interstitial and vacancy clusters that are formed directly within the cascade. The fraction of the surviving point defects contained in clusters, and the size distributions of these in-cascade clusters have been determined. Although the formation of true vacancy clusters appears to be inhibited in iron, a significant degree of vacancy site correlation was observed. These well correlated arrangements of vacancies can be considered nascent clusters, and they have been observed to coalesce during longer term Monte Carlo simulations which permit short range vacancy diffusion. Extensive interstitial clustering was observed. The temperature and cascade energy dependence of the cluster size distributions are discussed in terms of their relevance to microstructural evolution and mechanical property changes in irradiated iron-based alloys.

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
3662
Report Number(s):
ORNL/CP-101223; KC 02 01 04 0; 41 W6 95 3W 1
KC 02 01 04 0; 41 W6 95 3W 1; TRN: AH200112%%502
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Conference
Resource Relation:
Conference: Fall Meeting of the Materials Research Society, Boston, MA (US), 11/30/1998--12/04/1998; Other Information: PBD: 30 Nov 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; DIFFUSION; ENERGY DEPENDENCE; INTERSTITIALS; IRON; POINT DEFECTS; VACANCIES

Citation Formats

Stoller, R E. Point Defect Cluster Formation in Iron Displacement Cascades Up to 50 keV. United States: N. p., 1998. Web.
Stoller, R E. Point Defect Cluster Formation in Iron Displacement Cascades Up to 50 keV. United States.
Stoller, R E. Mon . "Point Defect Cluster Formation in Iron Displacement Cascades Up to 50 keV". United States. https://www.osti.gov/servlets/purl/3662.
@article{osti_3662,
title = {Point Defect Cluster Formation in Iron Displacement Cascades Up to 50 keV},
author = {Stoller, R E},
abstractNote = {The results of molecular dynamics displacement cascade simulations in iron at energies up to 50 keV and temperatures of 100, 600, and 900K are summarized, with a focus on the characterization of interstitial and vacancy clusters that are formed directly within the cascade. The fraction of the surviving point defects contained in clusters, and the size distributions of these in-cascade clusters have been determined. Although the formation of true vacancy clusters appears to be inhibited in iron, a significant degree of vacancy site correlation was observed. These well correlated arrangements of vacancies can be considered nascent clusters, and they have been observed to coalesce during longer term Monte Carlo simulations which permit short range vacancy diffusion. Extensive interstitial clustering was observed. The temperature and cascade energy dependence of the cluster size distributions are discussed in terms of their relevance to microstructural evolution and mechanical property changes in irradiated iron-based alloys.},
doi = {},
url = {https://www.osti.gov/biblio/3662}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {11}
}

Conference:
Other availability
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