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

Song, Gyuho; Kong, Tai; Dusoe, Keith J.; Canfield, Paul C.; Lee, Seok-Woo

doi:10.1007/s10853-018-2043-8

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

Journal Article · Wed Jan 24 00:00:00 EST 2018 · Journal of Materials Science

DOI:https://doi.org/10.1007/s10853-018-2043-8· OSTI ID:1425480

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Univ. of Connecticut, Storrs, CT (United States). Dept. of Materials Science and Engineering and Inst. of Materials Science
Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy

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.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1425480

Alternate ID(s):: OSTI ID: 22754606

Report Number(s):: IS-J--9587; PII: 2043

Journal Information:: Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 9 Vol. 53; ISSN 0022-2461

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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