Cymcap Hot Crack — [cracked]
A hot crack is a weld discontinuity characterized by a fracture that occurs along the grain boundaries during the final stages of solidification. Unlike cold cracks, which occur at lower temperatures due to hydrogen embrittlement, hot cracks are "hot" because they form when the metal is still at very high temperatures. Types of Hot Cracking
Figure 1 (conceptual) shows intergranular, oxidized crack surfaces typical of hot cracking. Cracks are exclusively located in the heat-affected zone (HAZ) of the Cymcap, 50–150 μm from the solder interface. Branched morphology with smooth, dendritic features indicates liquid film presence during cracking. cymcap hot crack
Replacing native soil with engineered material that has a guaranteed low thermal resistivity, even when dry. A hot crack is a weld discontinuity characterized