Wang, M.; Tasan, C. C.; Ponge, D.; Kostka, A.; Raabe, D.: Size effects on mechanical stability of metastable austenite. GDRi CNRS MECANO General Meeting on the Mechanics of Nano-Objects, MPIE, Düsseldorf, Germany (2013)
Dumont, M.; Kostka, A.; Sander, M.; Borbély, A.; Pyzalla, A. R.: Comparison of apatite crystallite sizes in sauropod and mammal fossil bones. 6th Bone diagenesis meeting, Poppelsdorfer Schloss, University of Bonn, Bonn, Deutschland (2009)
Kostka, A.; Song, J.; Raabe, D.; Veehmayer, M.: Microstructure and properties of interfaces formed by explosion cladding of Ti-Steel. XXI Conference on Applied Crystallography, Zakopane, Poland (2009)
Springer, H.; Kostka, A.: Verbinden von hochfestem Stahl mit einer Aluminiumlegierung durch Rührreibschweißen. 4. GKSS Workshop, Geesthacht, Germany (2009)
Coelho, R. S.; Kostka, A.; Pinto, H.; dos Santos, J.; Pyzalla, A. R.: Microstructure and residual stresses of high-strength steel to aluminium alloy friction stir welds. ICRS-8, Denver, USA (2008)
Coelho, R. S.; Kostka, A.; dos Santos, J.; Pyzalla, A. R.: Friction stir welding of aluminum alloy to steel. Part I: Mechanical properties. VI-PNAM Symposium, Berlin, Germany (2008)
Coelho, R. S.; Kostka, A.; dos Santos, J.; Pyzalla, A. R.: Friction stir welding of aluminum alloy to steel. Part II: Microstructure. VI-PNAM Symposium, Berlin, Germany (2008)
Coelho, R. S.; Kostka, A.; dos Santos, J.; Pyzalla, A. R.: Friction stir welding of aluminum alloy to steel. Part III: Material flow. VI-PNAM Symposium, Berlin, Germany (2008)
Coelho, R. S.; Kostka, A.; Zettler, R.; dos Santos, J.; Pyzalla, A. R.: On the microstructure and residual stresses in friction-stir dissimilar AA6040 aluminium alloy to AZ31 magnesium alloy weld. MECASENS IV, Wien (2007)
Kostka, A.; Coelho, R.; dos Santos, J.; Pyzalla, A. R.: Microstructure and Mechanical Properties of Aluminium - Steel Friction Stir Welds. Small Scale Plasticity Workshop, Braunwald, Switzerland (2007)
Kostka, A.; Coelho, R.; Zettler, R.; dos Santos, J.; Pyzalla, A. R.: Microstructure and Residual Stresses in an AA6040-T4/AZ31B Friction-Stir Weld. Euromat 2007, Nürnberg, Germany (2007)
Pinto, H.; Silva, P. A.; Kostka, A.; Chladil, H. F.; Clemens, H.; Pyzalla, A. R.: Microstructure and Residual Stress Formation in Oxide Layers Grown on the Gamma-Ti–45Al–5Nb Alloy. Euromat 2007, Nürnberg (2007)
Silva, P.; Pinto, H.; Kostka, A.; Chladil, H. F.; Pyzalla, A.: Microstructure and Residual Stress Formation in Oxide Layers Grown in High Niobium Containing g-TiAl Based Alloy. SNI 2006, German Conference for Research with Synchrotron Radiation, Neutrons and Ion Beams at Large Facilities, Hamburg, Germany (2006)
International researcher team presents a novel microstructure design strategy for lean medium-manganese steels with optimized properties in the journal Science
This project studies the influence of grain boundary chemistry on mechanical behaviour using state-of-the-art micromechanical testing systems. For this purpose, we use Cu-Ag as a model system and compare the mechanical response/deformation behaviour of pure Cu bicrystals to that of Ag segregated Cu bicrystals.
The aim of this project is to develop novel nanostructured Fe-Co-Ti-X (X = Si, Ge, Sn) compositionally complex alloys (CCAs) with adjustable magnetic properties by tailoring microstructure and phase constituents through compositional and process tuning. The key aspect of this work is to build a fundamental understanding of the correlation between…
In this project, we aim to enhance the mechanical properties of an equiatomic CoCrNi medium-entropy alloy (MEA) by interstitial alloying. Carbon and nitrogen with varying contents have been added into the face-centred cubic structured CoCrNi MEA.
Hydrogen is a clean energy source as its combustion yields only water and heat. However, as hydrogen prefers to accumulate in the concentrated stress region of metallic materials, a few ppm Hydrogen can already cause the unexpected sudden brittle failure, the so-called “hydrogen embrittlement”. The difficulties in directly tracking hydrogen limits…