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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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Issue

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

Section

SI: Russian mechanics contributions for Structural Integrity

Categories

License

Copyright (c) 2023 Anastasia Iziumova, Maxim Zhelnin, Anastasia Kostina, Aleksei Vshivkov, Elena Gachegova, Oleg Plekhov, S. Swaroop

Creative Commons License

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

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Open Access Statement

Frattura ed Integrità Strutturale (Fracture and Structural Integrity, F&SI) is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author. This is in accordance with the DOAI definition of open access.

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