7 papers
Unveiling the Atomistic Mechanisms of Shear-Induced LDAHDA Transformations and Shear Banding in Amorphous Silicon under High Pressures
Hao Chen, Valery I. Levitas, Tengyi Liu +3
Large-scale molecular dynamics simulations of shear deformation under constant pressures of amorphous silicon, PT from low-density-amorphous (LDA) to high-density-amorphous (HDA) S…
Pressure-Induced Martensitic Phase Transformation and Microstructure Evolution in nanograined Alloy
Mrinmay Sahu, Sorb Yesudhas, Valery I. Levitas +1
The Fe-Mn-based alloys are receiving immense attention due to their applications in the third generation of advanced high-strength steels, owing to their high strength and ductilit…
Uncovering origins of heterogeneous superconductivity in LaNiO using quantum sensors
Srinivas V. Mandyam, Esther Wang, Zhipan Wang +7
The family of nickelate superconductors have long been explored as analogs of the high temperature cuprates. Nonetheless, the recent discovery that certain stoichiometric nickelate…
Coupled plastic strain- and stress-induced phase transformations and microstructure evolution in Fe-7%Mn alloy in dynamic rotational diamond anvil cell
Sorb Yesudhas, Mrinmay Sahu, Valery I. Levitas +2
The first experiments in dynamic rotational diamond anvil cell (dRDAC) on severe plastic deformation (SPD) and BCC<->HCP phase transformation (PT) at pressure up to 27.6 GPa, rotat…
Severe plastic deformations, mechanochemistry, and microstructure evolution under high pressure: In Situ Experiments, Four-Scale Theory, New Phenomena, and Rules
Valery I. Levitas
Processes involving severe plastic deformations (SPD) and phase transformations and chemical reactions (PTs/CRs) under high pressures are widespread for obtaining new nanostructure…
Severe Plastic Deformation of Ceramics by High-Pressure Torsion: Review of Principles and Applications
Kaveh Edalati, Jacqueline Hidalgo-Jiménez, Thanh Tam Nguyen +8
Ceramics are typically brittle at ambient conditions due to their covalent or ionic bonding and limited dislocation activities. While plasticity, and occasionally superplasticity,…