The activities planned within WP4 of the H2020-GEMMA project will comprise corrosion/erosion tests to generate data for establishing corrosion correlations for design and safety assessments. Beside corrosion testing also mechanical tests and microstructural investigations are foreseen. The first batch of material is expected in the middle of 2018 which means that material is readily available when this PhD topic will start. The GEMMA project is mainly aimed towards practical application. While taking advantage of the possibility to get industrial relevant material, this PhD topic should go a step further and aim to identify and explain underlying mechanisms. During this PhD the welded material, including the heat effected zone and the base material should be characterized by mechanical testing methods like fracture toughness-, tensile- and hardness tests in different environments. Combining this with different microscopy techniques (Optical-, focused ion beam-, scanning electron, electron back scatter, and transmission electron microscopy) as well as X-ray diffraction will lead to a thorough understanding of the influence of delta ferrite, precipitates and segregations on the properties of austenitic stainless steel in heavy liquid metal environment.
For the investigations at SCK•CEN readily available testing equipment for liquid metal testing and microstructure facilities will be used.
 G. A. Young, M. J. Hackett, J. D. Tucker, and T.E. Capobianco, “Welds of Nuclear Systems” Comprehensive Nuclear Materials, 273-296, 2012
 A. Tavassoli, C. Picker and J. Wareing, "Data Collection on the Effect of Irradiation on the Mechanical Properties of Austenitic Stainless Steels and Weld Metals," Effects of Radiation On Materials : 17th Volume, pp. 995-1009, 1996.
 O. Chopra, "Degradation of LWR Core Internal Materials due to Neutron Irradiation," NUREG/CR-7072, p. 121, 2010.
 K. Chandra, V. Kain, V. Bhutani, V. S. Raja, R. Tewari, G. K. Dey and J. K. Chakravartty, "Low temperature thermal aging of austenitic stainless steel welds: Kinetics and effects on mechanical properties," Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, vol. 534, pp. 163-175, 2012.