Compressive behaviour of a squeeze cast AJ50 magnesium alloy

• Autorzy: Trojanová Z. , Drozd Z. , Lukáč P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: There is very limited information about the mechanical properties of Mg-Al-Sr alloys and therefore it is important to investigate mechanical properties at different temperatures and to estimate the mechanisms responsible for the deformation behaviour of Mg-Al-Sr alloys at elevated temperatures. Design/methodology/approach: Deformation behaviour of a Mg-Al-Sr magnesium alloy has been studied in compression in the temperature interval from room temperature up to 300 degrees centigrade. Stress relaxation tests were performed with the aim to find parameters of the thermally activated process. Findings: The yield stress as well as the maximum stress of the alloy are very sensitive to the testing temperature. Analysis of the work hardening coefficient determined the hardening and softening mechanisms operating during the deformation. Practical implications: The estimated activation energy and values of the activation volume indicate that the main thermally activated process is very probably the glide of dislocations in the non-compact planes. Originality/value: An analysis showed that the main hardening process is the storage of dislocations at impenetrable obstacles. The activation volume values indicate that the main thermally acivated process is connected with recovery process.

Słowa kluczowe

EN

mechanical properties; magnesium alloy; stress relaxation; hardening; thermal activation

PL

właściwości mechaniczne; stop magnezu; relaksacja naprężeń; umacnianie; aktywacja cieplna

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 22, nr 2
• Strony: 47--50
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Trojanová Z.

autor

Drozd Z.

autor

Lukáč P.

• Department of Physics of Materials, Faculty Mathematics and Physics, Prague, Ke Karlovu 5, CZ-121 16 Praha 2, Czech Republic,

Bibliografia

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