Structural and Fatigue Features of Ti64 Alloy after Different Laser Shock Peening

To select the optimal treatment mode of Ti64 alloy specimens with a stress concentrator, several laser shock peening (LSP) modes are studied. The effectiveness of the modes was determined by two criteria: indirect, based on the residual stress (RS) profile formed immediately after LSP (the depth of...

Full description

Saved in:
Bibliographic Details
Published in:Russian physics journal 2024-03, Vol.67 (3), p.287-295
Main Authors: Vshivkov, A. N., Iziumova, A. Yu, Gachegova, E. A., Plekhov, O. A.
Format: Article
Language:English
Subjects:
Concentrators
Condensed Matter Physics
Crystal defects
Electron back scatter
Fatigue failure
Fatigue tests
Grain orientation
Hadrons
Heavy Ions
Laser shock processing
Lasers
Mathematical and Computational Physics
Metal fatigue
Misalignment
Nuclear Physics
Optical Devices
Optics
Peening
Photonics
Physics
Physics and Astronomy
Residual stress
Theoretical
Titanium base alloys
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To select the optimal treatment mode of Ti64 alloy specimens with a stress concentrator, several laser shock peening (LSP) modes are studied. The effectiveness of the modes was determined by two criteria: indirect, based on the residual stress (RS) profile formed immediately after LSP (the depth of the layer with compressive RS and its maximum value), and direct, based on the number of cycles to failure during fatigue testing of Ti64 alloy flat specimens after hardening by LSP. The most effective LSP mode, which improves the fatigue properties of the specimens with the concentrator of the studied geometry, has been determined. To study the physical RS generation mechanisms, structural studies of the specimens after LSP have been carried out using the Electron Backscatter Diffraction (EBSD) method. The obtained data include the spread of the grain orientation, the average grain misorientation, and the change in the number of defects in the grains under different LSP modes. The results of the microstructure studies correlate with the profiles of the residual stresses caused by LSP.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-024-03120-5