Dynamic Fracture of Metals in Solid and Liquid States under Ultra- short Intensive Electron or Laser Irradiation
Year: 2014
Type: article
Abstract: Here we consider the dynamic fracture of metals in solid and liquid states as a non-equilibrium phase transition, consisting in nucleation and growth of spherical vapor cavities. Nucleation rate is obtained from probability of corresponding thermal fluctuations; it accounts the work against surface tension and the presence of weakened defective areas in solids. Governing equations for cavity growth are also written out; they account viscosity for liquid and the elastic-plastic properties for solid. The metal undergoing fracture is a two-phase medium consisting of condensed and vapor phases. The resulting model is physically based and demands a minimum of fitting parameters; meanwhile it describes existing experimental and molecular dynamics results in wide range of strain rate and temperature. The model allows calculating of the tensile strength of melts and solids as well as characteristic size of fragments. It can be applied to the problem of intensive electron or laser irradiation of metals.
Source: Procedia Materials Science
Institutions: Chelyabinsk State University, South Ural State University
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
Award: G4235488312
OpenAlex ID: W2000887143