Steady state
The steady state is the stable state of a material's mechanical properties after short-term deformations have subsided. It shows how the material behaves under repeated loads.
Physicochemical Mechanism of Action
After a certain number of cyclic loads, the material transitions to a state where it retains its mechanical properties. This state is independent of short-term deformations and demonstrates the long-term hardness and toughness of the material.
Metallurgical Relevance & Welding Risks
With poor welding procedures or excessive stresses, the material can transition to a steady-state condition that leads to increased hardness and reduced toughness. This can cause cracking and failure under cyclic loading.
Workshop Practice & Action Guidelines
To minimize the steady-state condition, it is important to handle the weld so it is not excessively peened or deformed. Use a controlled cooling curve and ensure adequate post-weld heat treatment (tempering).