Accession Number : AD0781978

Title :   The Dynamic Response of Aluminum to Pulsed Energy Deposition in the Melt-Dominated Regime,


Personal Author(s) : Oswald,Robert B. , Jr. ; McLean,Flynn B. ; Schallhorn,Dale R. ; Oldham,Timothy R.

Report Date : JUL 1973

Pagination or Media Count : 39

Abstract : The results of an experimental study of the material dynamic response of aluminum exposed to a high-fluence, low-energy, pulsed electron beam are presented. The experimental results are compared with calculations based on two equilibrium equation of state (EOS) models for metals in the melt regime. The first model is the simple Mie-Gruneisen (M-G) scheme for solids extrapolated into the liquid phase. The second model (the GRAY EOS) is a three-phase EOS which provides a more detailed and thermodynamically complete description of metals in the melt region. After the onset of melting the M-G theory differs appreciably from experiment, whereas the GRAY EOS provides good agreement. The results indicate that the P-V-T relationship during the melting process can be described by an equilibrium--but thermodynamically consistent--EOS model. (Modified author abstract)

Descriptors :   *Aluminum, *Thermal shock, *Melting, Electron beams, Pulses, Equations of state, Mathematical models, Computer applications, Thermodynamic properties

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE