Zynk-Guss - Analysis of the cyclic material behavior of zinc die casting alloys

Determination of material suitability taking into account stress-mechanical, technological, and statistical size influences.

Components made of zinc die-cast alloys are used in various industries due to their high surface and component quality and the efficiency of the hot-chamber die-casting process. However, they are rarely used for components subject to high cyclic loads because they lack structural durability characteristics. To change this, the cyclic material behavior of various zinc die-cast alloys was investigated and summarized in a design concept.

Due to its short cycle times and high productivity, the hot chamber die casting process is the most important manufacturing process for zinc materials. Compared to aluminum, zinc die-cast alloys are characterized by their low melting point and the possibility of producing thin-walled castings with high surface quality and dimensional accuracy. However, zinc die-cast alloys are rarely used for components subject to high cyclic loads due to a lack of characteristic values and design methods for describing cyclic material behavior.

In order to establish a basis for assessing component behavior under cyclic loading, the “Zynk-Guss” project investigated the cyclic material behavior of the Zamak 5 alloy (ZP0410), taking into account the influence of stress mechanics, technology, and statistical factors. The local microstructure resulting from the die casting process has the greatest influence on the fatigue strength, especially in thin-walled structures.

A key result of the project is the development of a design concept based on cyclic investigations and incorporating the results of the casting process simulation. The results prove that modern zinc die-casting alloys can also be used for highly stressed components if they are designed accordingly.

zynk guss Lebensdauer von zyklisch beanspruchten Bauteilen aus Zink-Druckguss
Design concept for evaluating the service life of cyclically stressed components made of die-cast zinc.

The “Zinc Casting” project is a decisive step toward establishing zinc die-cast alloys for demanding applications and helping to fully exploit the potential of these materials in terms of sustainability and lightweight construction.

Funding and partners


The IGF project Zynk-Guss(21900N) is funded by the German Aerospace Center (DLR) as part of the program for promoting industrial collective research (Industrial Collective Research project) by the German Federal Ministry for Economic Affairs and Energy based on a resolution of the German federal parliament (Bundestag).