Journal article
Evaluating the mechanical properties of metallic glass wires by nano-indentation
Journal of Achievements in Materials and Manufacturing Engineering, Vol.22(2), pp.39-42
2007
Abstract
Purpose: Metallic glass wire products are known for their high fatigue strength and their interesting magnetic properties. The thermo-kinetic requirements for fully amorphous structure in these cast alloys require rapid solidifications of the order of 106K per second. This condition imposes a section thickness of less than 200µm in diameter for fully amorphous structured wires. This unusual dimension makes it difficult to use the traditional pull type tensometric devices for characterising the mechanical properties of these high strength wires. The advent of nano-indentation techniques provide a new way of easily determining the mechanical properties of these high strength thin sectioned wires. This work reports the use of nano-indentation system to characterise the mechanical properties of Fe(Cr)SiB metallic glass wires Design/methodology/approach: The analysis of the averaged load displacement data from nano-indentation experiments allowed the use Hertzian indentation mechanics for the elastic and plastic contact and from which a representative stress-strain curve can be determined. Findings: The elastic modulus determined for the wire varied from 150-160GPa after corrections for the effect of indenter. The hardness and representative strength were respectively of the order of 1000Hv and 4000MPa. Research limitations/implications: These mechanical indices (except modulus) compared favourably well with measurements from other combinations of established techniques. The elastic modulus values were slightly lower than those reportedly determined by acoustic methods. Originality/value: This work emphasised the value of nano-indentation method as a relatively non destructive method for the mechanical characterisation of thin sectioned high strength fibres.
Details
- Title
- Evaluating the mechanical properties of metallic glass wires by nano-indentation
- Authors
- Ayodele Olofinjana (Author) - Universiti Brunei Darussalam, Brunei
- Publication details
- Journal of Achievements in Materials and Manufacturing Engineering, Vol.22(2), pp.39-42
- Publisher
- International O C S C O World Press
- Date published
- 2007
- ISSN
- 1734-8412
- Copyright note
- Copyright © 2007 International OCSCO World Press. Reproduced here with permission.
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99448846402621
- Output Type
- Journal article
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