Gregory B. Thompson

Carbon Clustering and its Associated Precipitation in a Martensitic High Strength Steel

Madyson G. Canulette, Gregory B. Thompson, Luke N. Brewer

The MS1500 advanced high strength steel (AHSS) is a candidate material for structural body components for automotives. As such, the ability to join these materials is a critical aspect for its manufacturing. This can be done under resistive spot welding and/or laser …

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Understanding microstructure-controlled brittle fracture and toughening through a probabilistic framework

Sajjad Hossain, Hunter K. Brumblay, Derek Dupre, Alyssa Stubbers et autres

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Mechanical Reinforcement of Layered Oxide Cathodes for Continuous High-Power Rate Delivery throughout Cycling

Juliana Eko, Anita Gift Agbeyegbe, Idris Adebanjo, Colton A. Gilleland et autres

Demand for high-energy-density cathodes with high power and stable cycling is increasing. Ni-rich layered cathodes, notably Li[Ni 0.9 Co 0.05 Mn 0.05 ]O 2 (NCM90), satisfy this requirement but suffer capacity loss driven by anisotropic volume expansion and deleterious phase transitions that …

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Understanding the impact of high-energy ball mill tooling on powder refinement and alloy formation: Microstructural evolution in immiscible W-Cr alloys

Colton A. Gilleland, B.C. Hornbuckle, K. Darling, Gregory B. Thompson

High-energy ball milling provides an effective means to drive thermodynamically non-favorable solid solutions while also refining the microstructure of powders. Key parameters in this process, such as the size and hardness of the milling media, the hardness of the milling vessel, and …

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CNN-based and optical flow-based image interpolation for TaC ceramics

Edgar Solano-Castrejon, Alejandro Álvaro Ramírez‐Acosta, Sierra Durkee, Alyssa Stubbers et autres

Designing phase‐adaptive UHTC multilayer composites: Layer width effects on mechanical and kinetic properties

J. Carter Stotts, Michael J. Large, Brennan R. Watkins, Gregory B. Thompson et autres

Abstract The B1 rocksalt transition metal carbides and nitrides are among the materials with the highest melting temperatures. Additionally, members of this group of materials possess high‐temperature strength with ductility facilitated by diffusional creep. As a result, these are attractive materials for …

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Comparison of deep conditional generative models for scanning electron microscopy image reconstruction

Emilio J. Espinosa-Cruz, Alejandro Álvaro Ramírez‐Acosta, Alyssa Stubbers, Gregory B. Thompson et autres

Image-to-image translation is a task in the field of computer vision that has been gaining importance in recent years, with the objective of transforming an image from one visual domain to another without losing coherence. This process has applications in various tasks, …

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First‐principles investigation of the anomalous carbon diffusion in TiC0.67

J. Carter Stotts, Xiaochuan Tang, Gregory B. Thompson, Christopher R. Weinberger

Abstract In this work, we address a long‐standing question about the link between vacancy order–disorder transitions and carbon diffusion activation energy in substoichiometric titanium carbide. This is accomplished using Monte Carlo and kinetic Monte Carlo simulations with energetics informed by the cluster …

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Plasticity-fracture competition and anomalous hardness in the hard metals

Brennan R. Watkins, Yuchen Huang, Alyssa Stubbers, Gregory B. Thompson et autres

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The Role of Carbon Depletion in the Morphology of Transition Metal Carbide Crystals

Yuchen Huang, Gregory B. Thompson, Christopher R. Weinberger

In this paper, we utilize density functional theory to explore the role of carbon depletion on crystal morphology in group IVB and VB transition metal carbides (TMCs). The surface energies of low-index planes ({100}, {110}, and {111}) with varying surface and bulk …

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Influence of transition metal type and sputter deposition conditions on the hardness of transition metal carbide thin films

C. Haas Blacksher, Alyssa Stubbers, Christopher R. Weinberger, Gregory B. Thompson

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The role of surface energy and plasticity in determining the fracture toughness of tantalum and tungsten

Sajjad Hossain, Hunter Brumblay, Gregory B. Thompson, Christopher R. Weinberger

This study quantifies the influence of impurities on the fracture behavior of tungsten (W) and tantalum (Ta) by examining their effects on ideal cleavage energy and fracture toughness . Using density functional theory (DFT), we calculated the reduction in ideal cleavage energy …

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