Fatigue life investigation of notched TC4 specimens subjected to different patterns of laser shock peening

Anastasia Iziumova; Maxim Zhelnin; Anastasia Kostina; Aleksei Vshivkov; Elena Gachegova; Oleg Plekhov; S. Swaroop

doi:10.3221/IGF-ESIS.65.08

Fatigue life investigation of notched TC4 specimens subjected to different patterns of laser shock peening

Authors

Anastasia Iziumova Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Russia https://orcid.org/0000-0002-1769-9175
Maxim Zhelnin Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Russia
Anastasia Kostina Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Russia
Aleksei Vshivkov Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Russia
Elena Gachegova Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Russia
Oleg Plekhov
S. Swaroop Vellore Institute of Technology, India

DOI:

https://doi.org/10.3221/IGF-ESIS.65.08

Keywords:

Laser shock peening, Fatigue life, titanium alloy TC4, Johnson-Cook plasticity model

Abstract

The exhaustion of constructive ways for increasing the service life of parts has led to the development of new methods which can improve their material properties during operation under various loading conditions. Laser shock peening (LSP) induces compressive residual stress field which prevents fatigue crack initiation and propagation in components. Characteristics of laser impact and treatment patterns play an important role in efficiency of LSP application for improvement of fatigue properties. This work is devoted to the experimental examination of two LSP patterns to reveal the most optimal scheme from fatigue live improvement point of view. Proposed LSP pattern allowed one to increase the fatigue life of specimens with semi-circular notch by an order of magnitude. The numerical simulation of the LSP was performed to visualize the residual stress field of treated specimen after loading and to give the interpretation of the experimentally observed improvement of fatigue life.

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Published

22-06-2023

Issue

Vol. 17 No. 65 (2023): July 2023

Section

SI: Russian mechanics contributions for Structural Integrity

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

Fatigue life investigation of notched TC4 specimens subjected to different patterns of laser shock peening. (2023). Frattura Ed Integrità Strutturale, 17(65), 100-111. https://doi.org/10.3221/IGF-ESIS.65.08