Influence of Deposition Plane Angle and Saline Corrosion on Fatigue Crack Growth in Maraging Steel Components Produced by Laser Powder Bed Fusion

Rui F. Fernandes; Joel de Jesus; Luís Borrego; Luís Vilhena; Amílcar Ramalho; José A. M. Ferreira

doi:10.3390/met12030433

Metals (Mar 2022)

Influence of Deposition Plane Angle and Saline Corrosion on Fatigue Crack Growth in Maraging Steel Components Produced by Laser Powder Bed Fusion

Rui F. Fernandes,
Joel de Jesus,
Luís Borrego,
Luís Vilhena,
Amílcar Ramalho,
José A. M. Ferreira

Affiliations

Rui F. Fernandes: Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University Coimbra, 3004-516 Coimbra, Portugal
Joel de Jesus: Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University Coimbra, 3004-516 Coimbra, Portugal
Luís Borrego: Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University Coimbra, 3004-516 Coimbra, Portugal
Luís Vilhena: Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University Coimbra, 3004-516 Coimbra, Portugal
Amílcar Ramalho: Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University Coimbra, 3004-516 Coimbra, Portugal
José A. M. Ferreira: Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University Coimbra, 3004-516 Coimbra, Portugal

DOI: https://doi.org/10.3390/met12030433
Journal volume & issue: Vol. 12, no. 3
p. 433

Abstract

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Maraging steels are used in several industries, namely in the molds industry. The determination of fatigue crack propagation resistance in 18Ni300 maraging steel at the Paris regime is a vital issue for safety-relevant components, which are designed to work for a large number of loading cycles before periodic inspections. The main goal of this work is to analyze the influence of the deposition plane angle and saline corrosion on fatigue crack growth in maraging steel samples produced by Laser Powder Bed Fusion (LPBF). The crack closure parameter was used in order to analyze the different fatigue crack growth behaviors, as well as the metallographic, hardness, fractography and corrosion/oxidation analysis. From this work, the main achievement was that the deposition plane angle did not reveal a notable influence in the fatigue crack growth behavior for the fatigue tests unsubmitted to saline corrosion. On the other hand, the fatigue crack growth behavior for the tests under saline corrosion showed an increase in the crack closure parameter due to the appearance of the crack closure induced by oxides, which reduced the fatigue crack growth speed. This phenomenon depends on the deposition plane angle, which controls the martensite amount and consequently controls the level of corrosion/oxidation.

Published in Metals

ISSN: 2075-4701 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://www.mdpi.com/journal/metals

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