Abstract: The invention relates to components made from ductile metallic materials, and to a method with which deformation or the load acting on these materials is to be determined by means of acoustic emissions analysis. For this purpose, a particulate substance which is brittle at least in the temperature range below 400° C. is added to the ductile metallic material, which may preferably be a weldable structural steel, but may also be a ductile light metal alloy (e.g. aluminum alloy), in order to intensify the acoustic emissions behavior. The particles should be brittle at least in the temperature range of use of the component in question, e.g. at room temperature. It is advantageous if the particles are also plastically deformable in the forming temperature range, so that a certain structure (elongate or acicular) of the particles can be achieved, for example during cold work-hardening.

Abstract: The invention relates to a process for producing hot-worked elongated products, such as bars or tubes, from high-alloy or hypereutectoid steel in which a feedstock is heated to a deformation temperature and undergoes at least one deformation step. Following the at least one deformation step, the deformed feedstock is either cooled or heated at a specific temperature to achieve a uniform temperature distribution throughout the length and thickness of the deformed feedstock. Next the deformed feedstock is reheated to a temperature below the deformation temperature. The reheated feedstock is continuously rolled in a multi-stand reducing mill to its final size and then cooled by ambient air.