Micropillar compression of LiF [111] single crystals: effect of size, ion irradiation and misorientation

Soler, R. and Molina Aldareguía, Jon M. and Segurado Escudero, Javier and Llorca Martinez, Francisco Javier and Merino, R.I. and Orera, V.M. (2012). Micropillar compression of LiF [111] single crystals: effect of size, ion irradiation and misorientation. "International Journal of Plasticity", v. 36 ; pp. 50-63. ISSN 0749-6419. https://doi.org/10.1016/j.ijplas.2012.03.005.

Description

Title: Micropillar compression of LiF [111] single crystals: effect of size, ion irradiation and misorientation
Author/s:
  • Soler, R.
  • Molina Aldareguía, Jon M.
  • Segurado Escudero, Javier
  • Llorca Martinez, Francisco Javier
  • Merino, R.I.
  • Orera, V.M.
Item Type: Article
Título de Revista/Publicación: International Journal of Plasticity
Date: September 2012
ISSN: 0749-6419
Volume: 36
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The mechanical response under compression of LiF single crystal micropillars oriented in the [111] direction was studied. Micropillars of different diameter (in the range 1–5 lm) were obtained by etching the matrix in directionally-solidified NaCl–LiF and KCl–LiF eutectic compounds. Selected micropillars were exposed to high-energy Ga+ ions to ascertain the effect of ion irradiation on the mechanical response. Ion irradiation led to an increase of approximately 30% in the yield strength and the maximum compressive strength but no effect of the micropillar diameter on flow stress was found in either the as-grown or the ion irradiated pillars. The dominant deformation micromechanisms were analyzed by means of crystal plasticity finite element simulations of the compression test, which explained the strong effect of micropillar misorientation on the mechanical response. Finally, the lack of size effect on the flow stress was discussed to the light of previous studies in LiF and other materials which show high lattice resistance to dislocation motion.

More information

Item ID: 15918
DC Identifier: http://oa.upm.es/15918/
OAI Identifier: oai:oa.upm.es:15918
DOI: 10.1016/j.ijplas.2012.03.005
Official URL: http://www.sciencedirect.com/science/article/pii/S0749641912000459
Deposited by: Memoria Investigacion
Deposited on: 28 Oct 2013 11:57
Last Modified: 02 Oct 2014 22:56
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