6 papers
Atomistic mechanism of corrosion-induced grain boundary migration in NiCr alloys in molten FLiNaK
Sadia Khan, Hamdy Arkoub, Miaomiao Jin
Corrosion of Ni-Cr structural alloys in molten fluoride salts is a persistent material degradation problem, yet the atomistic role of grain boundaries in this process remains poorl…
Electric-field effects on defect migration energetics in GaN
Farshid Reza, Hamdy Arkoub, Alexander S. Hauck +2
A predictive understanding of defect transport in GaN under operating electric fields is critical for assessing device reliability in high-power and radiation environments. In this…
Atomistic Mechanisms of Stress-Dependent Molten Salt Corrosion in NiCr Alloys
Hamdy Arkoub, Jia-Hong Ke, Miaomiao Jin
Ni-based structural alloys in molten salt environments often experience simultaneous mechanical loading and corrosive attack, yet the mechanisms governing stress-corrosion interact…
Percolating Corrosion Pathways of Chemically Ordered NiCr Alloys in Molten Salts
Hamdy Arkoub, Jia-Hong Ke, Kaustubh Bawane +1
Recent experiments have shown that chemical ordering in NiCr alloys can significantly accelerate corrosion in molten salt environments. However, the underlying mechanisms remain po…
Surface Orientation-dependent Corrosion Behavior of NiCr Alloys in Molten FLiNaK Salt
Hamdy Arkoub, Daniel Flynn, Adri C. T. van Duin +1
The corrosion behavior of NiCr alloys in molten FLiNaK salt is governed by complex Cr-F chemical interactions, necessitating a fundamental understanding for enhancing alloy perform…
First-Principles Investigation of Grain Boundary Effects on Fluorine-Induced Initial Corrosion of NiCr Alloys
Hamdy Arkoub, Miaomiao Jin
Chromium depletion at grain boundaries (GBs) due to selective attack is a critical issue in the molten salt corrosion of NiCr alloys. Despite the importance of GBs in this process…