Eutectic Degeneration
Eutectic degeneration is irregular or coarsened crystal formation during the melting and cooling of alloys with a eutectic point. This leads to poorer mechanical properties.
Physicochemical mechanism of action
Eutectic degeneration occurs when the conditions during crystallization of an alloy are disturbed, so that the eutectic structure does not properly develop. This can be caused by uneven cooling or chemical changes during the melting process.
Metallurgical relevance & risks in welding
Eutectic degeneration leads to a deterioration of mechanical properties such as strength, toughness, and hardness. Irregular crystal formation can cause cracks and deformation in the material, affecting the service life and reliability of the weldment.
Workshop practice & instructions
To avoid eutectic degeneration, it is important to ensure uniform cooling. This can be achieved by using cooling water or special coolants. Melting time and temperature must be precisely maintained to avoid chemical changes. For complex alloys, it is advisable to consult a metallurgist.