TY - GEN
T1 - The role of the structure of grain boundary interfaces during shock loading
AU - Perez-Bergquist, A. G.
AU - Escobedo, J. P.
AU - Trujillo, Carl Patrick
AU - Cerreta, Ellen Kathleen
AU - Gray, George Thompson
AU - Brandl, C.
AU - Germann, Timothy Clark
PY - 2012/6/13
Y1 - 2012/6/13
N2 - In order to understand the role of interface structure during shock loading, and specifically the role of interfaces in damage evolution due to shock, four copper bi-crystal grain boundaries (GBs) were studied under shock loading and incipient spall conditions. These boundaries, two [100]/[111] boundaries and two [100]/[100] boundaries, were characterized prior to deformation using optical microscopy (OM), electron back scattered diffraction (EBSD), and transmission electron microscopy (TEM) to determine axis/angle pair relationships and interface plane. Samples containing these boundaries were then subjected to incipient spall at 2.1 GPa and shock loading at 10 GPa, respectively, in an 80 mm gas gun. Samples were soft recovered and characterized post-mortem via EBSD and TEM. Preliminary results indicate that typical GBs readily form damage during shock loading but that special boundaries, such as twin boundaries, are resistant to failure. Differences in slip and defect transmissibility across these types of boundaries likely play a role in the failure modes.
AB - In order to understand the role of interface structure during shock loading, and specifically the role of interfaces in damage evolution due to shock, four copper bi-crystal grain boundaries (GBs) were studied under shock loading and incipient spall conditions. These boundaries, two [100]/[111] boundaries and two [100]/[100] boundaries, were characterized prior to deformation using optical microscopy (OM), electron back scattered diffraction (EBSD), and transmission electron microscopy (TEM) to determine axis/angle pair relationships and interface plane. Samples containing these boundaries were then subjected to incipient spall at 2.1 GPa and shock loading at 10 GPa, respectively, in an 80 mm gas gun. Samples were soft recovered and characterized post-mortem via EBSD and TEM. Preliminary results indicate that typical GBs readily form damage during shock loading but that special boundaries, such as twin boundaries, are resistant to failure. Differences in slip and defect transmissibility across these types of boundaries likely play a role in the failure modes.
UR - https://www.scopus.com/pages/publications/84861997207
U2 - 10.1063/1.3686533
DO - 10.1063/1.3686533
M3 - Conference contribution
SN - 9780735410060
T3 - AIP Conference Proceedings
SP - 1359
EP - 1362
BT - Shock Compression of Condensed Matter - 2011 - Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
T2 - 17th Biennial Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2011 APS SCCM
Y2 - 13 June 2012
ER -