Hot Cracking Phenomena in Welds


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Spara som favorit. Skickas inom vardagar. Failure of welded components can occur during service as well as during fabrication.

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Most common, analyses of the resistance of welded components against failure are targeted at crack avoidance. Such evaluations are increasingly carried out by modern weldability studies, i. Such weldability investigations are particularly targeted to prevent hot cracking, as one of the most common cracking phenomena occurring during weld fabrication.

To provide an international information and discussion platform to combat hot cracking, an international workshop on Hot Cracking Phenomena in Welds has been created, based on an initiative of the Institute for Materials and Joining Technology at the Otto-von-Guericke University in Magdeburg and the Division V. The first workshop was organized in Berlin under the topics mechanisms and phenomena, metallurgy and materials, modelling and simulations as well as testing and standardization.

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Hot Cracking Phenomena in Welds

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Hot Cracking Phenomena in Welds

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Cracking phenomena in welding 1. Welds may fail due to over-load, under design, or fatigue.

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This may be done by limiting the penetration of the welding process. The extra penetration afforded by some of the processes is not necessary and can be reduced.

This can be accomplished by using lower welding currents. In this situation, before the weld metal begins to solidify, manganese sulfides are formed which do not segregate. A slight decrease in arc voltage will cause the weld bead to return to a slightly convex profile and eliminate the cracking tendency.

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A reduction in travel speed will increase the amount of fill and return the surface to a convex profile. There must be a sufficient level of hydrogen; 2.

There must be a sufficiently sensitive material involved; 3. There must be a sufficiently high level of residual or applied stress. If this is a problem, a reduction in the strength of the weld metal will usually solve transverse cracking problems.

Hot Cracking Phenomena in Welds Hot Cracking Phenomena in Welds
Hot Cracking Phenomena in Welds Hot Cracking Phenomena in Welds
Hot Cracking Phenomena in Welds Hot Cracking Phenomena in Welds
Hot Cracking Phenomena in Welds Hot Cracking Phenomena in Welds
Hot Cracking Phenomena in Welds Hot Cracking Phenomena in Welds
Hot Cracking Phenomena in Welds Hot Cracking Phenomena in Welds
Hot Cracking Phenomena in Welds Hot Cracking Phenomena in Welds

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