Evaluating the mechanical properties of metallic glass wires by nano-indentation

• Autorzy: Olofinjana A. O.
• Języki publikacji: EN

Abstrakty

EN

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 10 to the 6 K per second. This condition imposes a section thickness of less than 200 micrometres 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 150-160 GPa after corrections for the effect of indenter. The hardness and representative strength were respectively of the order of 1000 Hv and 4000 MPa. 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.

Słowa kluczowe

EN

metallic alloys; amorphous materials; mechanical properties

PL

stopy metaliczne; materiały amorficzne; właściwości mechaniczne

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 22, nr 2
• Strony: 39--42
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Olofinjana A. O.

• Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link BE1410, Brunei Darussalam,

Bibliografia

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