Abbreviated Journal Title
Appl. Phys. Lett.
Keywords
HALL-PETCH RELATION; NANOCRYSTALLINE MATERIALS; QUASI-CRYSTALS; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; PHASE; NANOINDENTATION; BEHAVIOR; Physics, Applied
Abstract
Inverse Hall-Petch (IHP) behavior in nano-quasicrystalline Al62.5Cu25Fe12.5 is reported. Powders with varying grain sizes were produced by mechanical milling of spray-formed quasicrystals. The hardness of the milled powders increased with decreasing grain size down to about 40 nm and decreased with further refinement, demonstrating the IHP behavior. This critical grain size was found to be larger compared to other metallic nanocrystalline alloys. This IHP behaviour has been attributed to the structural complexity in quasicrystals and to thermally activated shearing events of atoms at the grain boundaries.
Journal Title
Applied Physics Letters
Volume
103
Issue/Number
20
Publication Date
1-1-2013
Document Type
Article
DOI Link
Language
English
First Page
5
WOS Identifier
ISSN
0003-6951
Recommended Citation
Mukhopadhyay, N. K.; Ali, F.; Scudino, S.; Khoshkhoo, M. Samadi; Stoica, M.; Srivastava, V. C.; Uhlenwinkel, V.; Vaughan, G.; Suryanarayana, C.; and Eckert, J., "Grain size softening effect in Al62.5Cu25Fe12.5 nanoquasicrystals" (2013). Faculty Bibliography 2010s. 4436.
https://stars.library.ucf.edu/facultybib2010/4436
Comments
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