THERMALLY AND/OR MECHANICALLY ACTUATED COMPONENT WALL OF A FLUID AND/OR GAS-CONVEYING COMPONENT, IN PARTICULAR A CYLINDER HEAD OF A COMBUSTION ENGINE

The invention relates to a thermally and/or mechanically stressed component wall (5) of a fluid-conducting and/or gas-conducting component in the form of a cylinder head (1) of an internal combustion engine, with at least one region at risk of cracking due to the stress, in which a crack develops operationally from the outer wall surface into the component wall (5), and with at least one crack stopper (6) which is arranged in the component wall (5) in the crack path and prevents further crack propagation, in particular through the component wall (5) into critical component regions (8). In the region at risk of cracking (5; 10) on the outer wall surface, a crack starter (4) is provided which forms a defined localized crack initiation point, so that locally uncontrolled crack formation and crack propagation is prevented. Furthermore, the component is a cylinder head (1) of an internal combustion engine and the stressed component wall is a valve bridge (5) between adjacent valve seats (3), wherein it is provided that the crack starter (4) runs on the outer wall side on the valve bridge (5) between the valve seats (3).