Supercooling
Undercooling is the process of cooling a liquid or phase below its equilibrium temperature without immediately solidifying. It promotes nucleation and crystal growth.
Physical-Chemical Mechanism of Action
Undercooling refers to the state of a liquid or phase that is cooled below its thermodynamic equilibrium temperature without immediately solidifying. This process is crucial for nucleation and crystal growth.
Metallurgical Relevance & Risks in Welding
In welding fabrication, undercooling is of great importance because it influences the material's microstructure. Too little undercooling can lead to fine grains and low strength, while too much undercooling can lead to coarse grains and an increased risk of cracking.
Workshop Practice & Instructions
To achieve optimal undercooling, welding parameters such as temperature and time must be precisely controlled. Exceeding the critical temperature can lead to fine grains, while too rapid cooling can result in coarse grains and cracking.