Volume 2, 2009DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||1353 - 1358|
|Published online||15 September 2009|
Sound velocity measurement of LY12 Al alloy under tensile stressJ. Hu, C. Dai, Y. Yu and H. Tan
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang, 621900 Sichuan, China
Published online: 15 September 2009
Experimentation for measuring sound velocity (Ck) under tension is described, and the determination of Ck is formulated in cases where spallation did and did not occur. Three experiments were conducted on LY12 Al alloy for measuring sound velocity under tension using a two-stage or single-stage gas gun. The sound velocities of LY12 Al alloy at different tensile stresses were extracted from the observed free-surface velocity traces. The extracted Ck data for LY12 Al alloy under tension is within the longitudinal (Cl) and bulk (Cb) sound velocity under ambient conditions, and is slightly deviated in value from the equivalent sound velocity Ce = 2ClCb/(Cl + Cb). The measured spall strength (σf) seems to slightly increase with increasing shock stress. The obtained results may provide insight into the spallation of metals and experimental data for numerical simulations of tension and spallation.
© EDP Sciences 2009