Fatigue Properties of Maraging Steel after Laser Peening

Petan, Luca and Grum, Janez and Porro González, Juan Antonio and Ocaña Moreno, José Luis and Sturm, Roman (2019). Fatigue Properties of Maraging Steel after Laser Peening. "Metals", v. 9 (n. 12); pp. 1271-1288. ISSN 2075-4701. https://doi.org/10.3390/met9121271.

Description

Title: Fatigue Properties of Maraging Steel after Laser Peening
Author/s:
  • Petan, Luca
  • Grum, Janez
  • Porro González, Juan Antonio
  • Ocaña Moreno, José Luis
  • Sturm, Roman
Item Type: Article
Título de Revista/Publicación: Metals
Date: 28 November 2019
ISSN: 2075-4701
Volume: 9
Subjects:
Freetext Keywords: microhardness; residual stresses; resonant fatigue resistance; roughness
Faculty: E.T.S.I. Industriales (UPM)
Department: Física Aplicada e Ingeniería de Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Maraging steels are precipitation hardening steels used for highly loaded components in aeronautical and tooling industry. They are subjected to thermomechanical loads and wear, which significantly shorten their service life. Improvements of their surface mechanical properties to overcome such phenomena are of great interest. The purpose of our research was to investigate the influence of pulse density and spot size of a laser shock peening (LSP) process on the surface integrity with the fatigue resistance of X2NiCoMo18-9-5 maraging steel. Surface integrity was analyzed through roughness, residual stress, and microhardness measurements. The tests performed on resonant testing machine confirmed LSP is a promising process for increasing fatigue resistance of a component. Fatigue crack occurs, when the resonance frequency decreases. This moment, when the fatigue crack initiation phase ends and the fatigue crack propagation phase starts, was chosen as the moment of failure. We have proved LSP is a successful method in improving fatigue resistance of maraging steel by appropriate combination of laser spot size and pulse density tested in our research.

More information

Item ID: 64303
DC Identifier: http://oa.upm.es/64303/
OAI Identifier: oai:oa.upm.es:64303
DOI: 10.3390/met9121271
Official URL: https://www.mdpi.com/2075-4701/9/12/1271
Deposited by: Memoria Investigacion
Deposited on: 02 Oct 2020 12:49
Last Modified: 02 Oct 2020 12:49
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