← Glossary

Interfacial Energy Modification

The energy at phase and grain boundaries is altered by adsorbed trace elements, affecting nucleation.

Physical-Chemical Mechanism of Action

Adsorbing trace elements change the interfacial energy between different phases and crystal structures. This affects the attractive force between atoms and thus changes the nucleation behavior.

Metallurgical Relevance & Risks in Welding

A modified interfacial energy can lead to improved toughness and resistance of the weld. However, uncontrolled use of trace elements can lead to phase transformations or uneven coarsening, impairing strength.

Workshop Practice & Action Instructions

Use trace elements like silicon or titanium in specified amounts. Ensure the weld cools in the right temperature range (e.g., t8/5 between 10 and 20 seconds) to ensure optimal structure and toughness.

MetallurgieSchweißtechnik

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