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Title: Shear localization and size-dependent strength of YCd6 quasicrystal approximant at the micrometer length scale

Abstract

Mechanical properties of materials are strongly dependent of their atomic arrangement as well as the sample dimension, particularly at the micrometer length scale. Here in this study, we investigated the small-scale mechanical properties of single-crystalline YCd6, which is a rational approximant of the icosahedral Y-Cd quasicrystal. In situ microcompression tests revealed that shear localization always occurs on {101} planes, but the shear direction is not constrained to any particular crystallographic directions. Furthermore, the yield strengths show the size dependence with a power law exponent of 0.4. Shear localization on {101} planes and size-dependent yield strength are explained in terms of a large interplanar spacing between {101} planes and the energetics of shear localization process, respectively. The mechanical behavior of the icosahedral Y-Cd quasicrystal is also compared to understand the influence of translational symmetry on the shear localization process in both YCd6 and Y-Cd quasicrystal micropillars. Finally, the results of this study will provide an important insight in a fundamental understanding of shear localization process in novel complex intermetallic compounds.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Connecticut, Storrs, CT (United States). Dept. of Materials Science and Engineering and Inst. of Materials Science
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1425480
Report Number(s):
IS-J-9587
Journal ID: ISSN 0022-2461; PII: 2043; TRN: US1802112
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Science
Additional Journal Information:
Journal Volume: 53; Journal Issue: 9; Journal ID: ISSN 0022-2461
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Quasicrystal; Quasicrystal Approximant; Shear Localization; Plasticity; Size effect

Citation Formats

Song, Gyuho, Kong, Tai, Dusoe, Keith J., Canfield, Paul C., and Lee, Seok-Woo. Shear localization and size-dependent strength of YCd6 quasicrystal approximant at the micrometer length scale. United States: N. p., 2018. Web. doi:10.1007/s10853-018-2043-8.
Song, Gyuho, Kong, Tai, Dusoe, Keith J., Canfield, Paul C., & Lee, Seok-Woo. Shear localization and size-dependent strength of YCd6 quasicrystal approximant at the micrometer length scale. United States. doi:10.1007/s10853-018-2043-8.
Song, Gyuho, Kong, Tai, Dusoe, Keith J., Canfield, Paul C., and Lee, Seok-Woo. Wed . "Shear localization and size-dependent strength of YCd6 quasicrystal approximant at the micrometer length scale". United States. doi:10.1007/s10853-018-2043-8. https://www.osti.gov/servlets/purl/1425480.
@article{osti_1425480,
title = {Shear localization and size-dependent strength of YCd6 quasicrystal approximant at the micrometer length scale},
author = {Song, Gyuho and Kong, Tai and Dusoe, Keith J. and Canfield, Paul C. and Lee, Seok-Woo},
abstractNote = {Mechanical properties of materials are strongly dependent of their atomic arrangement as well as the sample dimension, particularly at the micrometer length scale. Here in this study, we investigated the small-scale mechanical properties of single-crystalline YCd6, which is a rational approximant of the icosahedral Y-Cd quasicrystal. In situ microcompression tests revealed that shear localization always occurs on {101} planes, but the shear direction is not constrained to any particular crystallographic directions. Furthermore, the yield strengths show the size dependence with a power law exponent of 0.4. Shear localization on {101} planes and size-dependent yield strength are explained in terms of a large interplanar spacing between {101} planes and the energetics of shear localization process, respectively. The mechanical behavior of the icosahedral Y-Cd quasicrystal is also compared to understand the influence of translational symmetry on the shear localization process in both YCd6 and Y-Cd quasicrystal micropillars. Finally, the results of this study will provide an important insight in a fundamental understanding of shear localization process in novel complex intermetallic compounds.},
doi = {10.1007/s10853-018-2043-8},
journal = {Journal of Materials Science},
number = 9,
volume = 53,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1 : (a) Optical photograph of YCd6 QCA single crystal. The crystallographic direction can be easily derived from the shape of single crystal; (b) Optical photograph of single grained i-YCd QC agglomerates. Micropillars were fabricated along a [2 1 1 1 1 1] direction, about which there is themore » five-fold rotation symmetry (See the pentagon-shaped flat surface in the inset); (c) [0 0 1]- oriented YCd6 QCA micropillar with the top diameter of 1.74 μm.« less

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