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)
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, Germany (2009)
Springer, H.; Kostka, A.: Verbinden von hochfestem Stahl mit einer Aluminiumlegierung durch Rührreibschweißen. 4. GKSS Workshop, Geesthacht, Germany (2009)
Kostka, A.: Microstructure of Dissimilar Al to Steel Friction Stir Welds. XIII International Conference on Electron Microscopy, Zakopane, Poland (2008)
Kostka, A.: Microstructure and Properties of Al to Steel Friction Stir Overlap Welds. 7th International Friction Stir Welding Symposium, Awaji Island, Japan (2008)
Kostka, A.: ESBD Microstructure and Material Flow Characterization of an AA6181-T4 Aluminium Alloy to DP600 High Steel Friction Stir Butt-joint Weld. 3rd FSW Modelling and Material Flow Seminar, Geesthacht, Germany (2008)
Coelho, R. S.; Kostka, A.; Sheikhi, S.; Kocak, M.; Dos Santos, J.; Pyzalla, A. R.: Charakterisierung der Mikrostruktur und Verformung in Mg-Mg-Laserschweißnähten und Al-Stahl-Reibrührschweißverbindungen. 54. Metallkunde-Kolloquium Werkstoffforschung, Lech / Österreich (2008)
Garcia, J.; Lammer, A.; Garcia, L. F.; Weber, S.; Kostka, A.; Pyzalla, A. R.: Investigations of Wear Mechanisms in Diamond Tools with Fe-Based Matrices Reinforced with WC-Co Particles. Intern. Symposium on Friction, Wear and Wear Protection, Aachen, Germany (2008)
Garcia, L. F.; Garcia, J.; Kostka, A.; Weber, S.; Lammer, A.: Wear Behaviour of Cooper-Iron-Cobalt Diamond Tool Bonding Matrices Reinforced with Hardmetal Granulates. 9th Intern. Conference on the Science of Hard Materials, Montego Bay, Jamaica (2008)
Coelho, R. S.; Kostka, A.; Sheikhi, S.; dos Santos, J.; Pyzalla, A. R.: Friction Stir Welding of ZStE340 High-strength Steel and AA6181-T4 Aluminium Alloy. SOLVSTIR - International Seminar on Friction Stir Welding of Steels, Geesthacht (2007)
Agudo, L.; Pinto, H.; Kostka, A.; Weber, S.; Wagner, J.; Arenholz, E.; Bruckner, J.; Pyzalla, A. R.: Study of Microstructure and Residual Stresses in Dissimilar Al/Steel Welds Produced by Cold Metal Transfer. MECASENS IV, Wien (2007)
Coelho, R. S.; Kostka, A.; Riekehr, S.; Kocak, M.; Pyzalla, A. R.: Microstructure and residual stress of Nd:YAG laser AZ31B butt welds. MECASENS IV, Wien, Austria (2007)
Agudo, L.; Kostka, A.; Weber, S.; Wagner, J.; Arenholz, E.; Bruckner, J.; Pyzalla, A. R.: Al/Steel welds: Fundamental investigation of intermetallic phases. 4th Discussion Meeting on the Development of Innovative Iron Aluminium Alloys, FeAl2007, Interlaken, Switzerland (2007)
Kostka, A.; Tak, K.-G.; Eggeler, G.: On the effect of equal-channel angular pressing on creep of tempered martensite ferritic steels. Euromat 2007, Nürnberg (2007)
Coelho, R. S.; Kostka, A.; Riekehr, S.; Kocak, M.; Pyzalla, A. R.: Microstructure and Properties of AZ31B Magnesium Alloy Laser Beam Welds. Euromat 2007, Nürnberg, Germany (2007)
Hydrogen in aluminium can cause embrittlement and critical failure. However, the behaviour of hydrogen in aluminium was not yet understood. Scientists at the Max-Planck-Institut für Eisenforschung were able to locate hydrogen inside aluminium’s microstructure and designed strategies to trap the hydrogen atoms inside the microstructure. This can…
Microbiologically influenced corrosion (MIC) of iron by marine sulfate reducing bacteria (SRB) is studied electrochemically and surfaces of corroded samples have been investigated in a long-term project.
In this project we investigate the hydrogen distribution and desorption behavior in an electrochemically hydrogen-charged binary Ni-Nb model alloy. The aim is to study the role of the delta phase in hydrogen embrittlement of the Ni-base alloy 718.
Smaller is stronger” is well known in micromechanics, but the properties far from the quasi-static regime and the nominal temperatures remain unexplored. This research will bridge this gap on how materials behave under the extreme conditions of strain rate and temperature, to enhance fundamental understanding of their deformation mechanisms. The…
Biological materials in nature have a lot to teach us when in comes to creating tough bio-inspired designs. This project aims to explore the unknown impact mitigation mechanisms of the muskox head (ovibus moschatus) at several length scales and use this gained knowledge to develop a novel mesoscale (10 µm to 1000 µm) metamaterial that can mimic the…
Oxidation and corrosion of noble metals is a fundamental problem of crucial importance in the advancement of the long-term renewable energy concept strategy. In our group we use state-of-the-art electrochemical scanning flow cell (SFC) coupled with inductively coupled plasma mass spectrometer (ICP-MS) setup to address the problem.
For understanding the underlying hydrogen embrittlement mechanism in transformation-induced plasticity steels, the process of damage evolution in a model austenite/martensite dual-phase microstructure following hydrogenation was investigated through multi-scale electron channelling contrast imaging and in situ optical microscopy.
We plan to investigate the rate-dependent tensile properties of 2D materials such as metal thin films and PbMoO4 (PMO) films by using a combination of a novel plan-view FIB based sample lift out method and a MEMS based in situ tensile testing platform inside a TEM.
This project aims to investigate the influence of grain boundaries on mechanical behavior at ultra-high strain rates and low temperatures. For this micropillar compressions on copper bi-crystals containing different grain boundaries will be performed.