Tungsten is one of the strongest materials and is very important for fusion reactors because of its ability to remain strong at elevated temperatures. Nevertheless, its fracture properties have to be understood for making it fusion-ready. The research group at Erich Schmid Institute of Materials Science (ÖAW) tests the damage tolerance of high-heat flux materials and static fracture experiments have been state-of-the-art at the institute for a long time. Recently, due to a newly built experimental setup, it is now possible to apply dynamic mechanical loading to the sample simultaneously in vacuum and at high temperatures. The results of this work (equipment, scientific knowledge) is essential for life-time estimation of future (experimental) fusion reactors but and is applicable for other materials that are subjected to repeated mechanical loading at elevated temperatures