Weld Imperfection
Weld inhomogeneity is a deviation from the ideal weld geometry or defect-free microstructure. It can lead to mechanical strength and service life issues.
Physical-Chemical Mechanism of Action
Weld inhomogeneities arise from uneven melt distribution or faulty cooling. This can lead to varying grain sizes, stress zones, or chemical changes in the microstructure.
Metallurgical Relevance & Welding Risks
Inhomogeneities can reduce the mechanical strength of the weld and shorten its service life. They increase susceptibility to cracking and wear. In extreme cases, this can lead to sites for corrosion or fracture.
Shop Practice & Action Guidelines
To minimize weld inhomogeneities, ensure even melt distribution and controlled cooling. Use appropriate shielding gas mixtures and keep tools clean. For severe inhomogeneities, post-weld treatment or rewelding may be necessary.