Laser shock peening of copper poly- and single crystals

0541806 - FZÚ 2022 RIV US eng J - Journal Article
Kubásek, Jiří - Molnárová, Orsolya - Čapek, Jaroslav - Bartha, Kristína - Čižek, J. - Doležal, P. - Racek, Jan - Kaufman, Jan - Řídký, Jan - Lejček, Pavel
Laser shock peening of copper poly- and single crystals.
Materials Characterization. Roč. 174, April (2021), č. článku 111037. ISSN 1044-5803. E-ISSN 1873-4189
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT LM2018110
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : laser shock peening * copper * single crystal * microstructure * dislocation distribution
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.537, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.matchar.2021.111037

In this paper, the effect of laser shock peening (LSP) of mono- and polycrystalline copper was studied. It is shown that the residual stress caused by this process is accumulated at the LSP treated surface of the material, the thickness of which is several hundreds of micrometers. The affected layer contains an enhanced density of dislocations. These dislocations are homogeneously distributed on the cross-section in the single crystal along the single slip plane. The dislocations in the polycrystal are distributed heterogeneously on the sample cross-section. This heterogeneity is discussed from the viewpoint of the orientation dependence of individual grains and varied values of the Schmid factor and confirms the compressive nature of the stress caused by LSP. Depth dependence of the microhardness of the material decreases from the LSP treated surface in direction to the sample center correspondingly.

Permanent Link: http://hdl.handle.net/11104/0319355