Fracture Behavior of an AlMgMnSc Alloy at Different Temperatures

Abstract:

An Al-4.57Mg-0.35Mn-0.2Sc-0.09Zr (wt. %) alloy was studied in the fine-grained state obtaining after equal channel angular pressing. The mechanical behavior of alloy at the temperatures 173 K, 298 K and 348 K and at strain rate 1×10^–3 s^–1 is studied. Increase of the temperature testing from 173 K to 348 K decreases the yield stress by 80 MPa, the ultimate tensile strength by 60 MPa while elongation-to failure increases by a factor of 1.4. It was found that at temperatures of 298 and 173 K, the studied alloy mainly demonstrates the mode of ductile fracture, and at a temperature of 348 K the mechanism can be described as mixed ductile-brittle fracture. It was also established that of the studied alloy is the temperature dependence of the size of the dimples on the fracture surface. The formation of smaller dimples in the samples deformed at 298 K was observed.

• Periodical: Materials Science Forum (Volume 1016)
• Pages: 292-296
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1016.292
• Online since: January 2021
• Authors: Yuliya Igorevna Borisova*, Diana Yuzbekova, Anna Mogucheva
• Keywords: Aluminum Alloy, Ductile-Brittle Fracture, High Temperatures, Mechanical Properties

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