Constant Life Diagram
The endurance limit diagram shows the allowable stress amplitudes at various mean stresses and constant cycle counts. It summarizes Wöhler test results clearly.
Physical-Chemical Mechanism of Action
The endurance limit diagram visualizes the stress amplitudes that a material can withstand under cyclic loading without failure. It considers both mean stress and the number of cycles per unit time.
Metallurgical Relevance & Risks During Welding
Incorrect selection of stress amplitudes and cycle counts can lead to material failure. Too high stresses or too many cycles can cause cracks, fractures, or reduced service life.
Workshop Practice & Instructions
When welding, it is important to check the stress amplitudes and cycle counts against the endurance limit diagram. For a given mean stress and cycle count, ensure that the stress amplitude is within allowable limits. This can be achieved by choosing the right welding process and correct parameter regulation.