A method for bonding a single-crystal component with a polycrystalline member, and turbine blisk

The present invention relates to a method for bonding a non-rotationally symmetric component, preferably a turbine blade of single crystal material with a component, preferably a rotor core of polycrystalline material comprising the steps of - connecting the non-rotationally symmetrical component with an adapter piece of polycrystalline material by rotational friction welding, and -Add the adapter piece to the component of polycrystalline material.