About Al–Si Alloys Structure Features and Ductility and Strength Increasing after Deformation Heat Processing

Abstract

A technique of deformation heat processing for Al–Si based alloys is proposed which can significantly increase their both ductility and strength and also re- veals additional reserves for their strength and hardness increasing through cold work hardening. The method includes serial of small hot plastic defor- mations with intermediate cooling and short annealing. This makes the silicon inclusion rather small with shape close to spherical, which leads to the ductil- ity increasing. Then a work hardening processing could be performed for the material. Finally, both ductility and strength appear higher than in the initial cast state.