PSI - Issue 41

S.V. Uvarov et al. / Procedia Structural Integrity 41 (2022) 610–617 Author name / Structural Integrity Procedia 00 (2019) 000–000

611

2

Nomenclature D

diameter of sample thickness of sample

h

с 0

speed of sound in a continuous medium under normal conditions velocity of the free surface of a continuous medium initial density of a continuous medium under normal conditions

V Sf ρ 0 σ* ε˙* EG SW LSP

pressure (amplitude compression pulse) strain rate at the compression wave plastic front

explosive generator

shock wave

Laser Shock Peening

Nd:YAG neodymium-doped yttrium aluminum garnet VISAR Velocity Interferometer System for Any Reflector W energy of impulse by LASER X distance from the sample edge HV 0.1 microhardness with load of 100 g on the indenter HV 0.05microhardness with load of 50 g on the indenter

2. Materials and methods The scheme of the experiment is shown in Fig. 1

Fig. 1. Scheme of the experiment and sample preparation: 1 – Sample holder; 2 – Target sample; 3 – Water; 4 – Aluminum foil; 5 – Impact zone.

Specimens were loaded by Beamtech SGR-Extra-10 Nd:YAG pulse laser with wavelength 1064 nm. Pulse duration was 11nsand pulse energy 9.5 J to 10 J. Laser beam is focused onto a square spot 1x1 mm. To increase the wave amplitude the front surface was covered by a thin water layer. The water layer should be thin because of the absorption