AN ASSESSMENT OF THE POSSIBILITIES TO SHAPE THE MECHANICAL PROPERTIES OF CAST AZ91 MAGNESIUM ALLOY THROUGH APPLICATION OF PROPER HEAT TREATMENT

The aim of this publication is to assess the effect of different types of the standard heat treatment on changes in mechanical properties at room temperature of magnesium alloy from AZ91 family referred to the same properties in as-fabricated state. The investigated alloy was gravity cast into sand and metal moulds. The mechanically prepared specimens were subjected to a heat treatment during which they were transformed from the as-fabricated state to conditions: T4, T5 and T6. Testing of mechanical properties included determination of R_m, R_p02 and A₅ during static tensile test and Brinell hardness measurements (HB). The results of the investigations indicate that the mechanical properties of cast AZ91 alloy can be successfully shaped through the application of proper heat treatment.

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