Fatigue test
The fatigue test cyclically loads a specimen to investigate fatigue behavior. It shows how many load cycles a component can withstand in service.
Physical-Chemical Mechanism of Action
The fatigue test places a specimen between two supports and cycles it back and forth. This simulates the periodic loading that a component experiences in service.
Metallurgical Relevance & Risks in Welding
Fatigue behavior affects the service life of a component. Too many load cycles can cause material cracking or loss of mechanical properties. This is especially important in welding to ensure that the weld and the heat-affected zone remain stable in service.
Workshop Practice & Instructions
For the fatigue test, a special machine is used that cyclically loads the specimen. The number of load cycles is recorded and analyzed. For weld specimens, it is important that the weld remains stable and free of cracks. This can be ensured by proper heat treatment and appropriate material selection.