Mukhopadhyay, N K and Ali, F and Scudino, S and Khoshkhoo, M S and Stoica, M and Srivastava, V C and Uhlenwinkel, V and Vaughan, G and Suryanarayana, C and Eckert, J (2013) Grain size softening effect in Al62.5Cu25Fe12.5 nanoquasicrystals. Applied Physics Letters, 103 (IF-3.79). p. 201914.
![[thumbnail of (2013-with_Mukho-APL)Grain_size_softening_effect_in_Al62.5Cu25Fe12.5_nanoquasicrystals.pdf]](http://ictu2016-114.nmlindia.org/style/images/fileicons/application_pdf.png "(2013-with_Mukho-APL)Grain_size_softening_effect_in_Al62.5Cu25Fe12.5_nanoquasicrystals.pdf")
PDF
(2013-with_Mukho-APL)Grain_size_softening_effect_in_Al62.5Cu25Fe12.5_nanoquasicrystals.pdf - Published Version
Restricted to NML users only. Others may use ->
Download (739kB) | Request a copy
Abstract
Inverse Hall-Petch (IHP) behavior in nano-quasicrystalline Al 62.5 Cu 25 Fe 12.5 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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Nano-quasicrystal, ball milling, inverse Hall-Petch, hardness, grain size |
| Subjects: | Applied Physics Materials Science > Nanotechnology > Nanoparticle Characterization Nanoscience and Nanotechnology |
| Divisions: | Metal Extraction and Forming |
| Depositing User: | Dr. V.C. Srivastava |
| Date Deposited: | 30 Nov 2013 06:02 |
| Last Modified: | 30 Nov 2013 06:02 |
| URI: | http://ictu2016-114.nmlindia.org/id/eprint/6750 |
Actions (login required)
- View Item