NSF PAR Search | NSF Public Access Repository

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

Short-range ordering mechanics in FCC materials

https://doi.org/10.1016/j.ijplas.2024.103919

You, Daegun; Celebi, Orcun Koray; Gengor, Gorkem; Mohammed, Ahmed_Sameer Khan; Abuzaid, Wael; Sehitoglu, Huseyin (March 2024, International Journal of Plasticity)
NA (Ed.)
Short-range order (SRO) has a crucial impact on the mechanical strength of metallic alloys. Recent atomistic investigations defined an average SRO and attempted to correlate it with the yield strength. We propose that the local change in SRO upon slip advance must dictate the strengthening, and we elaborate the methodology to establish the “SRO change” on a slip plane considering the Wigner-Seitz cell. The model captures the variation of lattice resistance (Critical Resolved Shear Stress; CRSS) in the crystal as the SRO changes depending on the probability of neighboring atoms. The methodology was applied to Ni-V binary alloys for a wide range of compositions and stacking fault widths. The complex variation of CRSS with compositional variations shows good agreement with limited experimental results.
more » « less
Full Text Available
Negative stacking fault energy in FCC materials-Its implications

https://doi.org/10.1016/j.ijplas.2023.103770

You, Daegun; Celebi, Orcun Koray; Mohammed, Ahmed_Sameer Khan; Sehitoglu, Huseyin (November 2023, International Journal of Plasticity)
NA (Ed.)
This paper shows a derivation of stacking fault width for negative stacking fault energy in medium entropy alloys.
more » « less
Full Text Available
Effect of Dislocation Character on the CRSS

https://doi.org/10.1016/j.actamat.2023.118982

Celebi, Orcun Koray; Mohammed, Ahmed Sameer; Sehitoglu, Huseyin (August 2023, Acta Materialia)

Full Text Available
CRSS determination combining ab-initio framework and Surrogate Neural Networks

https://doi.org/10.1016/j.ijplas.2023.103524

You, Daegun; Celebi, Orcun Koray; Mohammed, Ahmed_Sameer Khan; Abueidda, Diab W; Koric, Seid; Sehitoglu, Huseyin (March 2023, International Journal of Plasticity)
NA (Ed.)
Critical Resolved Shear Stress (CRSS) determination is the focus of this paper.
more » « less
Full Text Available
Critical stress prediction upon accurate dislocation core description

https://doi.org/10.1016/j.actamat.2022.117989

Mohammed, Ahmed Sameer; Celebi, Orcun Koray; Sehitoglu, Huseyin (July 2022, Acta Materialia)

Full Text Available
Evolving dislocation cores at Twin Boundaries: Theory of CRSS Elevation

https://doi.org/10.1016/j.ijplas.2021.103141

Celebi, Orcun Koray; Mohammed, Ahmed Sameer; Krogstad, Jessica A.; Sehitoglu, Huseyin (January 2022, International Journal of Plasticity)

Full Text Available

Search for: All records