TY - CONF A1 - Weczera, S. A1 - Rhode, Michael A1 - Sunderkoetter, C. A1 - Plath, A. A1 - Jüttner, S. T1 - Laboratory experiments on press hardened steels in different delivered states exposed to hydrogen T2 - CHS2 2015 - 5th International conference on hot sheet metal forming of high-performance steel (Proceedings) N2 - The legal and economical demands in the automotive industry lead to increasing efforts reducing the CO2 emissions. A way to achieve that goal is to reduce the total weight of the car and therefore the fuel consumption. With the application of high strength steels in car body manufacturing it is possible to decrease the sheet thickness of the used materials and therefore the weight of the automobile. Components made of high strength steels can be produced by cold forming as well as by hot forming. In high strength steel the hydrogen content plays a crucial role for the component behavior. It is known that the hydrogen diffusivity and solubility are based on several factors, for example increasing dislocation density by cold working processes, vacancies, chemical composition and grain boundaries. The understanding and the control of the interaction between hydrogen and the high strength press hardened steels is an important factor for the application of the materials. The scope of this work is the determination of hydrogen diffusion and permeability kinetics in press hardened steel samples. An electrochemical hydrogen permeation method was applied on boron-manganese steel grades with different rolling reduction in initial ferrite/pearlite matrix as well as for the as-quenched martensite microstructure. The diffusible hydrogen contents of the specimens were measured using the carrier gas hot extraction technique (CGHE). T2 - CHS2 2015 - 5th International conference on hot sheet metal forming of high-performance steel CY - Toronto, Ontario, Canada DA - 31.05.2015 KW - Automotive KW - High strength steel KW - Hydrogen KW - Measurement KW - Carrier gas hot extraction KW - Press-hardened KW - Martensite KW - 22MnB5 KW - Permeation PY - 2015 VL - 5 SP - 45 EP - 54 PB - Verlag Wissenschaftliche Scripten CY - Auerbach, Germany AN - OPUS4-33468 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -