Jo, M. C.; Choi, J. H.; Lee, H.; Zargaran, A.; Ryu, J.; Sohn, S. S.; Kim, N. J.; Lee, S.: Effects of solute segregation on tensile properties and serration behavior in ultra-high-strength high-Mn TRIP steels. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing 740-741, pp. 16 - 27 (2019)
Kim, D. W.; Sohn, S. S.; Kim, W.-K.; Kim, K.-S.; Lee, S.: Study of Bauschinger effect of acicular ferrite and polygonal ferrite through ex-situ interrupted bending tests in API X80 linepipe steels. Scientific Reports 8 (1), 15598 (2018)
Jo, M. C.; Lee, H.; Zargaran, A.; Ryu, J.; Sohn, S. S.; Kim, N. J.; Lee, S.: Exceptional combination of ultra-high strength and excellent ductility by inevitably generated Mn-segregation in austenitic steel. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing 737, pp. 69 - 76 (2018)
Lee, D. H.; Sohn, S. S.; Song, H.; Ro, Y.; Lee, C. S.; Lee, S.; Hwang, B.: Effects of Start and Finish Cooling Temperatures on the Yield Strength and Uniform Elongation of Strain-Based API X100 Pipeline Steels. Metallurgical and Materials Transactions A 49 (10), pp. 4536 - 4543 (2018)
Kim, Y.-J.; Kim, H.; Kang, M.; Rhee, K.; Shin, S. Y.; Lee, S.: Correlation of microstructure, chip-forming properties, and dynamic torsional properties in free-machining steels. Metallurgical and Materials Transactions A 44 (10), pp. 4613 - 4625 (2013)
Sohn, S. S.; Han, S. Y.; Shin, S. Y.; Bae, J.; Lee, S.: Effects of microstructure and pre-strain on Bauschinger effect in API X70 and X80 linepipe steels. Metals and Materials International 19 (3), pp. 423 - 431 (2013)
Sohn, S. S.; Han, S. Y.; Shin, S. Y.; Bae, J.; Lee, S.: Analysis and estimation of the yield strength of API X70 and X80 linepipe steels by double-cycle simulation tests. Metals and Materials International 19 (3), pp. 377 - 388 (2013)
Kim, H.; Kang, M.; Shin, S. Y.; Lee, S.: Alligatoring phenomenon occurring during hot rolling of free-machining steel wire rods. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing 568, pp. 8 - 19 (2013)
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…
Hydrogen induced embrittlement of metals is one of the long standing unresolved problems in Materials Science. A hierarchical multiscale approach is used to investigate the underlying atomistic mechanisms.
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 will investigate the electrothermomechanical response of individual metallic nanowires as a function of microstructural interfaces from the growth processes. This will be accomplished using in situ SEM 4-point probe-based electrical resistivity measurements and 2-point probe-based impedance measurements, as a function of mechanical strain and…
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.
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
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,...
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…