2025-04-09 09:00:00
Three different boron carbide materials, with distinct microstructures, were impacted over two high velocity ranges to study their fracture mechanisms as well as crater formation and penetration performance. The first velocity range (1-3 km/s) was used to compare the materials without penetration, and the…
Hypervelocity impacts generate a flash of light, known as an impact flash, and have plumes of ejecta that are complex, both temporally and spatially, composed of condensed phased particles, fragments, and gases. Recently, several hypervelocity impact experiments were conducted at the Johns Hopkins Hypervelocity…
The exploration of Swift Heavy Ions (SHI) in semiconductors is crucial due to the ion’s ability to induce material damage. One form of such damage is the creation of latent tracks during irradiation when the ions collide with the semiconductor material. Various physical processes…
Phase change materials (PCMs) have gained significant attention as electrical/photonic materials due to their fast transition between two distinct phases. In this study, we propose a thermodynamically consistent coupled phase-field (PF) model that incorporates various physical phenomena, including phase transition (PT), heat transfer, thermoelectricity,…
A PCB is a multi-material assembly, whose constituents present very different coefficients of thermal expansion. Because of this CTE mismatch, stresses appear inside the PCB when the latter undergoes thermal loading and failure can occur. During qualification, PCB must pass successfully several tests. Two…
With a large band gap and low intrinsic carrier concentration, β-Ga2O3 suggests a robust platform for operation of electronic devices at a high temperature. The performance Ga2O3 transistors with different gate metals has been characterized in vacuum and air at temperatures up to 500…
The superior material properties give GaN heterostructure based HEMT devices a unique stability, reliability, and robustness for their use in extreme environments. The trap related issues due to inherent defects in the material system pose threat to the stable and reliable operation of the…
Ceramic matrix composites (CMCs) play a crucial role in applications demanding a combination of lightweight and high-resistance to impact loading. The interfacial bonding between reinforcement grains and the matrix can significantly influence the overall mechanical properties of such materials, including energy dissipation and fracture…
Understanding the high-pressure strength of materials is vital to developing physics-based material models for high-velocity impact applications. In this study, we investigate the pressure-dependent dynamic strength behavior of OFHC copper at strain rates of 10^5 s^-1 and pressures approaching 50 GPa. High-pressure shear plate…
The motion of dislocations in the high strain rate and dynamic loading regime has been of great interest due to its implication on the plastic deformation in these regimes. Previous theoretical and computational works have shown that dislocations can move faster than the speed…
