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15 papers
Atomistic deformation behavior of single and twin crystalline Cu nanopillars with preexisting dislocations
Won-Seok Ko, Alexander Stukowski, Raheleh Hadian +7
Molecular dynamics simulations are performed to investigate the role of a coherent Σ3 (111) twin boundary on the plastic deformation behavior of Cu nanopillars. Our work reveals th…
Thermodynamics of vacancies in concentrated solid solutions: From dilute Ni-alloys to the Cantor system
Daniel Utt, Alexander Stukowski, Karsten Albe
The vacancy concentration at finite temperatures is studied for a series of (CoCrFeMn)Ni alloys by grand-canonical Monte-Carlo (MC) simulation…
The origin of jerky dislocation motion in high-entropy alloys
Daniel Utt, Subin Lee, Yaolong Xing +5
Dislocations in single-phase concentrated random alloys, including high- entropy alloys (HEAs), repeatedly encounter pinning during glide, resulting in jerky dislocation motion. Wh…
Experimental and theoretical study of tracer diffusion in a series of (CoCrFeMn)Ni alloys
Josua Kottke, Daniel Utt, Mathilde Laurent-Brocq +8
Tracer diffusion of all constituting elements is studied at various temperatures in a series of (CoCrFeMn)Ni alloys with compositions ranging from pure Ni to the equi…
Metal hardening in atomistic detail
Luis A. Zepeda-Ruiz, Alexander Stukowski, Tomas Oppelstrup +4
Through millennia humans exploited the natural property of metals to get stronger or hardened when mechanically deformed. Ultimately rooted in the motion of dislocations, mechanism…
Interface-controlled creep in metallic glass composites
Constanze Kalcher, Tobias Brink, Jochen Rohrer +2
In this work we present molecular dynamics simulations on the creep behavior of metallic glass composites. Surprisingly, all composites exhibit much higher cre…