Shock waves in polycrystalline iron by Kadau, K, Germann, T, Lomdahl, P, Albers, R, Wark, J, Higginbotham, A, Holian, B

Shock waves in polycrystalline iron. by Kadau, K, Germann, T, Lomdahl, P, Albers, R, Wark, J, Higginbotham, A, Holian, B

“…The propagation of shock waves through polycrystalline iron is explored by large-scale atomistic simulations. …”

Picosecond X-ray diffraction studies of shocked single crystals - art. no. 62610T by Wark, J, Belak, J, Collins, G, Colvin, J, Davies, H, Duchaineau, M, Eggert, J, Germann, T, Hawreliak, J, Higginbotham, A, Holian, B, Kadau, K, Kalantar, D, Lomdahl, P, Lorenzana, H, Meyers, M, Murphy, W, Park, N, Remington, B, Rosolankova, K, Rudd, R, Schneider, MS, Sheppard, J, Stolken, J

“…One area of physics which has benefited particularly from these advances is the the field of shock-waves. Whilst it has been known for many years that crystalline matter, subjected to uniaxial shock compression, can undergo plastic deformation and, for certain materials, polymorphic phase transformations, it has hitherto not been possible to observe the rearrangement of the atoms on the pertinent timescales. …”

Picosecond X-ray diffraction studies of shocked single crystals by Wark, J, Belak, J, Collins, G, Colvin, J, Davies, H, Duchaineau, M, Eggert, J, Germann, T, Hawreliak, J, Higginbotham, A, Holian, B, Kadau, K, Kalantar, D, Lomdahl, P, Lorenzana, H, Meyers, M, Murphy, W, Park, N, Remington, B, Rosolankova, K, Rudd, R, Schneider, MS, Sheppard, J, Stolken, J

“…One area of physics which has benefited particularly from these advances is the the field of shock-waves. Whilst it has been known for many years that crystalline matter, subjected to uniaxial shock compression, can undergo plastic deformation and, for certain materials, polymorphic phase transformations, it has hitherto not been possible to observe the rearrangement of the atoms on the pertinent timescales. …”

Picosecond X-ray diffraction from laser-shocked copper and iron by Wark, J, Belak, J, Collins, G, Colvin, J, Davies, H, Duchaineau, M, Eggert, J, Germann, T, Hawreliak, J, Higginbotham, A, Holian, B, Kadau, K, Kalantar, D, Lomdahl, P, Lorenzana, H, Meyer, M, Remington, B, Rosolankova, K, Rudd, R, Schneider, MS, Sheppard, J, Stolken, J

“…Detailed molecular dynamics calculations provide novel information about the process, and point towards methods whereby the dislocation density might be measured during the passage of the shock wave itself. We also report on recent experiments where we have obtained diffraction images from shock-compressed single-crystal iron. …”

Direct observation of the alpha-epsilon transition in shock-compressed iron via nanosecond x-ray diffraction. by Kalantar, D, Belak, J, Collins, G, Colvin, J, Davies, H, Eggert, J, Germann, T, Hawreliak, J, Holian, B, Kadau, K, Lomdahl, P, Lorenzana, H, Meyers, M, Rosolankova, K, Schneider, MS, Sheppard, J, Stölken, J, Wark, J

“…Previous identification of this transition in shock-loaded iron has been inferred from the correlation between shock-wave-profile analyses and static high-pressure x-ray measurements. …”

Molecular dynamics simulations of shock-induced plasticity in tantalum by Tramontina, D, Erhart, P, Germann, T, Hawreliak, J, Higginbotham, A, Park, N, Ravelo, R, Stukowski, A, Suggit, M, Tang, Y, Wark, J, Bringa, E

“…We present Non-Equilibrium Molecular Dynamics (NEMD) simulations of shock wave compression along the [001] direction in monocrystalline Tantalum, including pre-existing defects which act as dislocation sources. …”