Razvoj i primena Al-legura u izradi elemenata karoserija putničkih automobila

Abstract

In order to reduce the vehicle weight, i.e. to exploit the vehicle more economically, the consumption of light materials in fabrication of passenger cars has grown during the last few years. The application of Al-alloys sheet metals, first of all in the manufacture of carbody elements, is extremely important. Because of reduced formability of Al-alloys sheet metals in comparison to steel sheet metals, many difficulties may occur while using these materials. Decrease of strength, intensive strain localization and sensitivity to tribo-conditions are main limiting factors in application of Al-alloys. This paper gives the characteristics of different Al-alloys with application areas, standard and special formability parameters, and results of laboratory and production investigations when using one carbody element