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Fatigue properties of maraging steel after laser peening
ID Petan, Luca (Author), ID Grum, Janez (Author), ID Porro, Juan Antonio (Author), ID Ocaña, José Luis (Author), ID Šturm, Roman (Author)

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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.

Language:English
Keywords:microhardness, residual stresses, resonant fatigue resistance, roughness
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Year:2019
Number of pages:17 str.
Numbering:Vol. 9, iss. 12, art. 1271
PID:20.500.12556/RUL-133110 This link opens in a new window
UDC:620.1(045)
ISSN on article:2075-4701
DOI:10.3390/met9121271 This link opens in a new window
COBISS.SI-ID:16961819 This link opens in a new window
Publication date in RUL:11.11.2021
Views:590
Downloads:106
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI AG
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:01.12.2019

Secondary language

Language:Slovenian
Keywords:mikrotrdota, zaostale napetosti, odpornost na resonančno utrujanje, hrapavost

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

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