Delandar, A. H.; Haghighat, S. M. H.; Korzhavyi, P.; Sandström, R.: Dislocation dynamics modeling of plastic deformation in single-crystal copper at high strain rates. International Journal of Materials Research 107 (11), pp. 988 - 995 (2016)
Haghighat, S. M. H.; Schäublin, R. E.: Obstacle strength of binary junction due to dislocation dipole formation: An in-situ transmission electron microscopy study. Journal of Nuclear Materials 465, pp. 648 - 652 (2015)
Haghighat, S. M. H.; Schäublin, R. E.; Raabe, D.: Atomistic simulation of the a0 <1 0 0> binary junction formation and its unzipping in body-centered cubic iron. Acta Materialia 64, pp. 24 - 32 (2014)
Schäublin, R. E.; Haghighat, S. M. H.: Molecular dynamics study of strengthening by nanometric void and Cr alloying in Fe. Journal of Nuclear Materials 442 (1-3 Suppl.1), pp. S643 - S648 (2013)
Haghighat, S. M. H.; Eggeler, G. F.; Raabe, D.: Effect of climb on dislocation mechanisms and creep rates in γ’-strengthened Ni base superalloy single crystals: A discrete dislocation dynamics study. Acta Materialia 61 (10), pp. 3709 - 3723 (2013)
Haghighat, S. M. H.; Schäublin, R.: In situ transmission electron microscopy of the interaction between a moving dislocation and obstacles of dislocation character in pure iron. Philosophical Magazine Letters 93 (10), pp. 575 - 582 (2013)
Haghighat, S. M. H.; Schäublin, R.: In-situ transmission electron microscopy of dislocation-defect interaction in bcc-Fe. In: DISLOCATIONS 2012, pp. 33 - 36. 4th International Conference on Dislocations, Budapest, Hungary, August 27, 2012 - August 31, 2012. (2012)
Haghighat, S. M. H.; Li, Z.; Zaefferer, S.; Reed, R. C.; Raabe, D.: Mesoscale modeling of dislocation climb and primary creep process in single crystal Ni base superalloys. International Workshop on Dislocation Dynamics Simulations, Saclay, France (2014)
Haghighat, S. M. H.; Welsch, E. D.; Gutiérrez-Urrutia, I.; Roters, F.; Raabe, D.: Mesoscale modeling of dislocation mechanisms and the effect of nano-sized carbide morphology on the strengthening of advanced lightweight high-Mn steels. MMM2014, 7th International Conference on Multiscale Materials Modeling
, Berkeley, CA, USA (2014)
Haghighat, S. M. H.; Li, Z.; Zaefferer, S.; Reed, R. C.; Raabe, D.: Characterization and modeling of the propagation of creep dislocations from the interdendritic boundaries in single crystal Ni base superalloys. International Workshop on Modelling and Simulation of Superalloys, Bochum, Germany (2014)
Haghighat, S. M. H.; Welsch, E. D.; Gutiérrez-Urrutia, I.; Raabe, D.: Alloy design of advanced lightweight high-Mn steels by combined TEM and discrete dislocation dynamics simulations. 2nd International Conference on High Manganese Steels, Aachen, Germany (2014)
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…
This project will aim at developing MEMS based nanoforce sensors with capacitive sensing capabilities. The nanoforce sensors will be further incorporated with in situ SEM and TEM small scale testing systems, for allowing simultaneous visualization of the deformation process during mechanical tests
The project aims to study corrosion, a detrimental process with an enormous impact on global economy, by combining denstiy-functional theory calculations with thermodynamic concepts.
Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen.
Thermo-chemo-mechanical interactions due to thermally activated and/or mechanically induced processes govern the constitutive behaviour of metallic alloys during production and in service. Understanding these mechanisms and their influence on the material behaviour is of very high relevance for designing new alloys and corresponding…
Nickel-based alloys are a particularly interesting class of materials due to their specific properties such as high-temperature strength, low-temperature ductility and toughness, oxidation resistance, hot-corrosion resistance, and weldability, becoming potential candidates for high-performance components that require corrosion resistance and good…
Understanding hydrogen-assisted embrittlement of advanced structural materials is essential for enabling future hydrogen-based energy industries. A crucially important phenomenon in this context is the delayed fracture in high-strength structural materials. Factors affecting the hydrogen embrittlement are the hydrogen content,...
Understanding hydrogen-assisted embrittlement of advanced high-strength steels is decisive for their application in automotive industry. Ab initio simulations have been employed in studying the hydrogen trapping of Cr/Mn containing iron carbides and the implication for hydrogen embrittlement.
Within this project, we will investigate the micromechanical properties of STO materials with low and higher content of dislocations at a wide range of strain rates (0.001/s-1000/s). Oxide ceramics have increasing importance as superconductors and their dislocation-based electrical functionalities that will affect these electrical properties. Hence…