Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Mannesmann Aktiengesellschaft

Karlheinz Kutzenberger

Gustav Zouhar

Gunther Manig

Heinz Kron

Lothar Schneider

Ulf Waag

Horst Kuhnicke

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&deg; 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.

Components made of ductile metallic material and method for determining deformations and/or strains by means of sound emission analysis

Method of manufacturing hot-worked elongated products, in particular bar

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Dresden, Germany

Gustav Zouhar