Dendrite
Dendrites are tree-like crystal structures that grow along certain directions during solidification of liquid metals. They lead to uneven melt distribution and can cause porosity and destruction.
Physical-Chemical Mechanism of Action
Dendrites are crystal structures that grow in tree-like shapes along certain crystal directions. They form during solidification of liquid metals and lead to uneven melt distribution.
Metallurgical Relevance & Welding Risks
Dendrites can cause porosity and destruction, impairing the strength and mechanical properties of the weld. They also lead to uneven hardness distribution and increase susceptibility to cracks and hot cracks.
Workshop Practice & Instructions
To avoid dendrite formation, it is important to ensure even melt distribution. This can be achieved through optimal heat input time and correct welding speed. For highly susceptible materials or under high stress, it is advisable to take additional control measures such as using shielding gases.