Dehm, G.; Balk, T. J.; von Blanckenhagen, B.; Gumbsch, P.; Arzt, E.: Dislocation dynamics in sub-micron confinement: recent progress in Cu thin film plasticity. Zeitschrift für Metallkunde/Materials Research and Advanced Techniques 93 (5), pp. 383 - 391 (2002)
Schillinger, W.; Clemens, H.; Dehm, G.; Bartels, A.: Microstructural stability and creep behavior of a lamellar γ-TiAl based alloy with extremely fine lamellar spacing. Intermetallics 10 (5), pp. 459 - 466 (2002)
Bartels, A.; Clemens, H.; Dehm, G.; Lach, E.; Schillinger, W.: Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy. Zeitschrift für Metallkunde/Materials Research and Advanced Techniques 93 (3), pp. 180 - 185 (2002)
Dehm, G.; Wagner, T. A.; Balk, T. J.; Arzt, E.; Inkson, B. J.: Plasticity and interfacial dislocation mechanisms in epitaxial and polycrystalline Al films constrained by substrates. Journal of Materials Science & Technology 18 (2), pp. 113 - 117 (2002)
Kobrinsky, M. J.; Dehm, G.; Thompson, C. L.; Arzt, E.: Effects of thickness on the characteristic length scale of dislocation plasticity in Ag thin films. Acta Materialia 49 (17), pp. 3597 - 3607 (2001)
Dehm, G.; Weiss, D.; Arzt, E.: In situ transmission electron microscopy study of thermal-stress-induced dislocations in a thin Cu film constrained by a Si substrate. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing 309-310, pp. 468 - 472 (2001)
Legros, M.; Dehm, G.; Keller-Flaig, R.-M.; Arzt, E.; Hemker, K. J.; Süresh, S.: Dynamic observation of Al thin films plastically strained in a TEM. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing 309-310, pp. 463 - 467 (2001)
Scheu, C.; Dehm, G.; Kaplan, W. D.: Equilibrium amorphous silicon-calcium-oxygen films at interfaces in copper-alumina composites prepared by melt infiltration. Journal of the American Ceramic Society 84 (3), pp. 623 - 630 (2001)
Zhang, D.; Dehm, G.; Clemens, H.: On the microstructural evolution and phase transformation in a high niobium containing γ-TiAl alloy. Zeitschrift für Metallkunde 91 (11), pp. 950 - 956 (2000)
Chatterjee, A.; Dehm, G.; Scheu, C.; Clemens, H.: Onset of microstructural instability in a fully lamellar Ti-46.5 at.% Al-4 al.% (Cr,Nb,Ta,B) alloy during short-term creep. Zeitschrift für Metallkunde/Materials Research and Advanced Techniques 91 (9), pp. 755 - 760 (2000)
Dehm, G.; Arzt, E.: In-situ transmission electron microscopy study of dislocations in a polycrystalline Cu thin film constrained by a substrate. Applied Physics Letters 77 (8), pp. 1126 - 1128 (2000)
Zhang, D.; Dehm, G.; Clemens, H.: Effect of heat treatments and hot-isostatic pressing on phase transformations and microstructure in a β/B2 containing γ-TiAl based alloy. Scripta Materialia 42 (11), pp. 1065 - 1070 (2000)
Dehm, G.; Scheu, C.; Bamberger, M. S.: Microstructure of Iron Substrates Borided with Ni2B Particles by Laser-Induced Surface-Alloying. Zeitschrift für Metallkunde 90 (11), pp. 920 - 929 (1999)
About 90% of all mechanical service failures are caused by fatigue. Avoiding fatigue failure requires addressing the wide knowledge gap regarding the micromechanical processes governing damage under cyclic loading, which may be fundamentally different from that under static loading. This is particularly true for deformation-induced martensitic…
In this project we conduct together with Dr. Sandlöbes at RWTH Aachen and the department of Prof. Neugebauer ab initio calculations for designing new Mg – Li alloys. Ab initio calculations can accurately predict basic structural, mechanical, and functional properties using only the atomic composition as a basis.
Low dimensional electronic systems, featuring charge density waves and collective excitations, are highly interesting from a fundamental point of view. These systems support novel types of interfaces, such as phase boundaries between metals and charge density waves.
Oxides find broad applications as catalysts or in electronic components, however are generally brittle materials where dislocations are difficult to activate in the covalent rigid lattice. Here, the link between plasticity and fracture is critical for wide-scale application of functional oxide materials.
In this project we study - together with the department of Prof. Neugebauer and Dr. Sandlöbes at RWTH Aachen - the underlying mechanisms that are responsible for the improved room-temperature ductility in Mg–Y alloys compared to pure Mg.
The wide tunability of the fundamental electronic bandgap by size control is a key attribute of semiconductor nanocrystals, enabling applications spanning from biomedical imaging to optoelectronic devices. At finite temperature, exciton-phonon interactions are shown to exhibit a strong impact on this fundamental property.
Enabling a ‘hydrogen economy’ requires developing fuel cells satisfying economic constraints, reasonable operating costs and long-term stability. The fuel cell is an electrochemical device that converts chemical energy into electricity by recombining water from H2 and O2, allowing to generate environmentally-friendly power for e.g. cars or houses…
The project Hydrogen Embrittlement Protection Coating (HEPCO) addresses the critical aspects of hydrogen permeation and embrittlement by developing novel strategies for coating and characterizing hydrogen permeation barrier layers for valves and pumps used for hydrogen storage and transport applications.