Micro-cracking in the heat-affected zone

Microcracks are very small cracks in the material that form due to thermal stresses or grain boundary effects. They can lead to wear and reduction of mechanical properties.

Physical-Chemical Mechanism of Action

Microcracks form due to thermal expansion and contraction of the material under stress. Rapid cooling or high stresses can cause cracks at grain boundaries.

Metallurgical Relevance & Welding Risks

Microcracks can lead to wear and reduced mechanical properties. They grow with continued loading and can lead to macroscopic cracks, shortening the material's lifespan.

Workshop Practice & Action Guidelines

To minimize microcracking, ensure controlled cooling. Use appropriate welding processes and materials with low stress sensitivity. Follow the manufacturer's heat treatment specifications.

MetallurgieSchweißtechnik