TY - JOUR A1 - Falkenreck, Thora E. A1 - Böllinghaus, Thomas T1 - Blast resistance of high-strength structural steel welds JF - Welding in the World N2 - As consequence for increasing threats by IEDs (Improvised Explosive Devices) on vehicles, the blast resistance of the welded frames and bodies becomes increasingly important. Considering vehicle welds subjected to blasting, the real configurations of the joints in the structure and the position of the blast loads have to be considered. The present contribution thus focuses on a weld joint at the explosion endangered wheel well of a tactical truck. The high-strength steel welds were subsequently impacted by explosion loads within the upper range from those experienced in practical military operation to cause not only deformation, but also to investigate the ultimate fracture behaviour of the high-strength weld. The interaction between cooling time t8/5 and displacement, crack path as well as fracture surface was analysed. The analyses of the fracture surfaces revealed ductile overload failure and also the size of the dimples was influenced by the cooling time t8/5. As a prominent feature, these investigations showed that the crack path of such high-strength steel welds under blasting is less influenced by the final hardness level in the respective weld microstructures but much more affected by the hardness gradient at the fusion line and inside the Heat Affected Zone (HAZ). KW - Explosions KW - High strength steels KW - MAG welding KW - Cooling rate PY - 2016 DO - https://doi.org/10.1007/s40194-016-0307-y SN - 0043-2288 SN - 1878-6669 VL - 60 IS - 3 SP - 475 EP - 483 PB - Springer CY - Heidelberg, Germany AN - OPUS4-36378 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -