Equivalence Formula for Non-Ferrous Weldability
The Equivalence Formula for Non-Ferrous Weldability is a mathematical criterion that assesses the tendency of aluminum and titanium alloys to hot cracking and porosity during welding. It helps in selecting suitable joining processes.
Physico-chemical mechanism of action
The equivalence formula calculates the stress that occurs in the metals during welding. It takes into account factors such as alloy composition, temperature, and stress load. A high formula value indicates that the materials are under high stress and can deform easily, which can lead to hot cracking.
Metallurgical relevance & welding risks
With advanced aluminum and titanium alloys, a high equivalence formula can lead to an increased tendency for hot cracking and porosity. This can impair the strength and mechanical behavior of the weld. It is crucial to adjust the process so that stress remains under control.
Workshop practice & action instructions
To minimize the equivalence formula and increase non-ferrous weldability, the following measures should be taken:
• Use suitable welding processes such as TIG or laser welding.
• Ensure that the alloy is correctly prepared and free of unwanted impurities.
• Carefully regulate temperature and stress during the welding process.
• Continuously monitor the weld for porosity and cracks and take corrective action if necessary.