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Effect of Gallium ion damage on poly-crystalline Zirconium: Direct experimental observations and molecular dynamics simulations

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Title Effect of Gallium ion damage on poly-crystalline Zirconium: Direct experimental observations and molecular dynamics simulations
 
Creator REVELLY, AK
MONPARA, G
SAMAJDAR, I
KRISHNA, KVM
TEWARI, R
SRIVASTAVA, D
DEY, GK
PANWAR, AS
 
Subject INDUCED GRAIN-GROWTH
TRIPLE JUNCTIONS
METAL-FILMS
THIN-FILMS
BEAM
BOMBARDMENT
ORIENTATION
IRRADIATION
EVOLUTION
DIFFUSION
Radiation damage
Microstructure
Focused ion beam
EBSD
Zirconium
Molecular dynamics
 
Description This study involved controlled focused ion beam (FIB) damage of high purity poly-crystalline Zirconium (Zr) and EBSD (electron backscattered diffraction) observations on the same region/microstructure. Direct experimental observations were augmented by molecular dynamics (MD) simulations: the latter demonstrating a hierarchy of microstructural features enabling/retarding relative ion damage. Experimental results clearly established a non-monotonic dependence of damage kinetics with average grain size. Damage increased with grain size, till an average grain size of 12 micron, and then dropped. This was explained from combined effects of grain size and in-grain misorientations. For lower than 12 micron average grain size, noticeable in-grain misorientations enabled lower damage kinetics. For greater than 17 micron grain size, with insignificant in-grain misorientations, reduced presence of high angle grain boundaries were shown to retard relative ion damage. (C) 2015 Published by Elsevier B.V.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2016-01-15T04:17:55Z
2016-01-15T04:17:55Z
2015
 
Type Article
 
Identifier JOURNAL OF NUCLEAR MATERIALS, 467(1)155-164
0022-3115
1873-4820
http://dx.doi.org/10.1016/j.jnucmat.2015.07.018
http://dspace.library.iitb.ac.in/jspui/handle/100/17737
 
Language en