Crack Growth Rate
The crack growth rate indicates how fast a crack propagates under repeated loading. It is proportional to the stress intensity and the number of cycles.
Physical-Chemical Mechanism of Action
The crack propagation rate describes how fast a crack grows under cyclic loading. It depends on stress intensity and the number of cycles. The higher the stress and the number of cycles, the faster the crack grows.
Metallurgical Relevance & Welding Risks
A crack propagation rate that is too high can lead to rapid crack growth, shortening the service life of components and machine parts. This can lead to safety issues and component failure.
Shop Practice & Action Guidelines
To minimize the crack propagation rate, it's important to control the loading on components. This can be achieved through optimal material selection and careful assembly. During welding, make sure no unnecessary stresses are introduced to reduce the risk of cracks.