Mechanical properties of cast light alloys

Conclusions

• 1. With reduction of the testing temperature from +20 to −253°C the yield strength of cast aluminum alloys increases (by an average of 35%). Under the same conditions the yield strength of magnesium alloys increases by an average of 30% and the ultimate strength by an average of 25%. The ultimate strength of aluminum alloys AL4, AL19, and ATsMG increases, while that of alloys AL8 and AL27-1 decreases along with a substantial reduction of the ductility (δ<1%) at temperature below −70°C.

• 2. Alloys AL19 and VML2 are the most suitable for operation at low temperatures, since they show little or no sensitivity to stress concentrators and have a satisfactory ductility at temperatures from +20 to −253°C.