TY - JOUR A1 - Bakir, Nasim A1 - Gumenyuk, Andrey A1 - Rethmeier, Michael T1 - Investigation of solidification cracking susceptibility during laser beam welding using an in-situ observation technique T2 - SCIENCE AND TECHNOLOGY OF WELDING AND JOINING N2 - In recent years, laser beam welding has found wide applications in many industrial fields. Solidification cracks are one of the most frequently encountered welding defects that hinder obtaining a safe weld joint. Decades of research have shown that one of the main causes of such cracks are the strain and the strain rate. Obtaining meaningful measurements of these strains has always been a major challenge for scientists, because of the specific environment of the measurement range and the many obstacles, as well as the high temperature and the plasma plume. In this study, a special experimental setup with a high-speed camera was employed to measure the strain during the welding process. The hot cracking susceptibility was investigated for 1.4301 stainless steel, and the critical strain required for solidification crack formation was locally and globally determined. PB - Taylor and Francis KW - Solidification cracking KW - Laser welding KW - Optical measurement KW - In situ strain KW - Critical strain KW - Strain rate PY - 2018 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/43992 AN - OPUS4-43992 SN - 1362-1718 SN - 1743-2936 VL - 23 IS - 3 SP - 234 EP - 240 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany