Microstructural Stress

Physicochemical Mechanism of Action

Microstructural stress occurs when different metal phases in the weld pool have different thermal expansion coefficients. During cooling, these differences cause stresses within the weld.

Metallurgical Relevance & Risks in Welding

Microstructural stress can lead to cracks and deformations, especially if it is too high. It also affects the mechanical properties such as strength and durability of the weld.

Workshop Practice & Action Instructions

To minimize microstructural stress, ensure uniform cooling. Use appropriate filler materials and control welding parameters such as temperature and time. For high-stress applications, it may be helpful to preheat the workpiece before welding.