Microstructural changes in the welding of titanium-stabilized steels

Practical Metallography, vol. 61, pp. 717–727

Abstract

Abstract At the Central Institute for Engineering, electronics, and Analytics (ZEA-1 by its acronym in German) of the Jülich Research Center GmbH, a cryostat was developed for the European Spallation Neutron Source (ESS) and manufactured from a titanium-stabilized austenitic stainless steel alloy (EN 1.4571). After tungsten inert gas welding, the welds exhibited a black, patchy discoloration. After materialographic preparation, the phenomena were examined using microscopic methods to assess their impact on the strength of the weld and thus on the usability of the cryostat. Not only could the impact on the cryostat operation be assessed, but the formation mechanism could be elucidated and suitable measures could be outlined to avoid the black, patchy discoloration.

Authors 7

1. D. Wanhoff

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Zentralinstitut für Engineering, Elektronik und Analytik (ZEA-1) , Leo-Brandt-Str. 1 , Jülich , Deutschland

2. Falk Schulze‐Küppers

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Zentralinstitut für Engineering, Elektronik und Analytik (ZEA-1) , Leo-Brandt-Str. 1 , Jülich , Deutschland

3. N. Bauske

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Zentralinstitut für Engineering, Elektronik und Analytik (ZEA-1) , Leo-Brandt-Str. 1 , Jülich , Deutschland

4. Y. Beßler

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Zentralinstitut für Engineering, Elektronik und Analytik (ZEA-1) , Leo-Brandt-Str. 1 , Jülich , Deutschland

5. Fred Pauly

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Zentralinstitut für Engineering, Elektronik und Analytik (ZEA-1) , Leo-Brandt-Str. 1 , Jülich , Deutschland

6. H. Willms

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Zentralinstitut für Engineering, Elektronik und Analytik (ZEA-1) , Leo-Brandt-Str. 1 , Jülich , Deutschland

7. Ghaleb Natour Aachen Fakultät für Maschinenwesen

   RWTH Aachen University

   Affiliation as printed

   ISF, Fakultät für Maschinenwesen, RWTH Aachen , Aachen , Deutschland