Joining and Assessment

Techniques and Equipment

The department Joining and Assessment of the Helmholtz-Zentrum Geesthacht maintains a comprehensive understanding of the interplay between joining technology, in-service properties (micro structure, general mechanical, fatigue and breakage behaviour of welding joints, and material and component behaviour influenced by joining. Therefore a strong basis is made for development of system solutions for difficult medium to long term problems posed in the area of light-weight structures.

The equipment comprises laser and diffusion welding equipment, testing laboratories for static and cyclic (fatigue) testing, an analytical laboratory and an X-ray laboratory for testing without destruction.

Laserhalle

A new hall with a semi-industrial laser system has been built at the Helmholtz-Zentrum Geesthacht, in collaboration with Airbus Deutschland GmbH. The hall was officially opened on April 19, 2010 by representatives of HZG and Airbus. The new system will be used to research laser beam welding of new lightweight construction alloys, among other areas. The material researchers from Geesthacht are taking over the system from the Airbus location in Nordenham.
The new system will be used to optimise welding technologies for innovative lightweight alloys in joint research and development projects. With the pilot welding system, it is now possible to weld up to a length of about nine metres in the newly constructed hall. The system is ideal for research in the area of strength and reliability of laser welded light-weight structures. Joining of aluminium and magnesium alloys are major fields of application. Further developments include joining of high-strength steels, production processes for CFRP-Ti joints as well as repair welding technologies for TiAl components.

In the future, the HZG will increasingly be geared towards development of new lightweight materials and material systems. To this end, construction of the pioneering HZG “Light-weight Materials Assessment, Computing and Engineering Centre” (ACE) is planned. The new laser system will be part of this expansion. The particular strength of the ACE research platform will lie in the combination of processing, characterisation and simulation methods. This includes both joining technology and production of sample multi-material systems and complex lightweight structures.

Technique in Detail

Contact

Head of Department Joining and Assessment

Dr. Nikolai Kashaev

Institute for Materials Research

Phone: +49 (0)4152 87 2536

E-mail contact