Comparison of Additively Manufactured vs. Conventional Maraging Steel in Corrosion-Fatigue Performance after various surface treatments

Bouzakis, E.; Arvanitidis, Apostolos; Kazelis, Fotis; Maliaris, G.; Michailidis, Nikolaos

doi:10.1016/j.procir.2020.03.003

Cited by 23 publications

(11 citation statements)

References 13 publications

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“…The life of most components and tools is related to abrasion on the surface, the occurrence of fatigue cracks and corrosion effects. All these influences begin to apply mainly from the surface of components, and that is why it is crucial to influence the mechanical and other properties of the surface area [1,2].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Nitriding on the Geometric Accuracy of Parts of Special Technology

Dobrocký

Pokorny

Studeny

et al. 2020

METAL 2020 Conference Proeedings

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The current development of chemical-heat treatment technologies is aimed at increasing the utility properties of components and improving the quality of the produced surface. A prerequisite for a quality produced surface is the selection of a suitable method of surface machining before the application of chemical-heat treatment technology. Due to the requirements for functional areas of special technology, grinding is chosen in most cases. The present paper deals with the effect of nitriding in plasma and gas on the geometric accuracy of parts made of 42CrMo4 steel. This steel is widely used in special technology for the production of barrels, breech-block cases, ball screws and gears. On the ground steel samples, the 3D measurement on the coordinate measuring machine analyzed the change of dimensions after the application of nitriding in plasma and gas. Furthermore, the surface texture change was evaluated using 2D surface roughness parameters and 3D parameters of area. After nitriding in both plasma and gas, the dimensions increased by 0.034 mm in diameter. After the nitriding processes, the values of 2D and 3D surface roughness parameters decreased. A change in surface texture was observed when evaluating 3D parameters in both chemical-heat treatment processes. Increasing the dimensions and changing the texture of the surface affects the subsequent function of the components.

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Section: Introductionmentioning

confidence: 99%

The Influence of Nitriding on the Geometric Accuracy of Parts of Special Technology

Dobrocký

Pokorny

Studeny

et al. 2020

METAL 2020 Conference Proeedings

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“…Previous studies have already established the high hardness in SLM components than their wrought equivalents. The difference was due to the fine cellular-dendritic network of SLM components compared to coarse-grained structures of their wrought counterparts (Bouzakis et al, 2020;Shindo et al, 2012;Stendal et al, 2018). In the present study, the high percentage change in the hardness of the wrought samples after the heat treatment can be explained as follows.…”

Section: Microhardness Analysismentioning

confidence: 64%

Effect of aging and finish machining on the surface integrity of selective laser melted maraging steel

Taşçıoğlu¹,

Khan

Kaynak

et al. 2021

RPJ

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Purpose The present study aims to investigate the effect of finish machining and aging processes on the surface integrity of the selective laser melted (SLM) maraging steel samples and compared them with those obtained conventionally. Design/methodology/approach Finish machining and aging were applied on the SLM and wrought maraging samples to investigate and compare their microstructural and mechanical properties such as surface roughness, microhardness and wear resistance. Findings After applying aging and finish machining treatments, the surface roughness <1 µm, microhardness (542Hv) and wear resistance (COF 0.578) of SLM samples were similar to their wrought counterparts. Compared to finish machining, the effect of aging was more significant on the microhardness and the wear resistance, regardless of sample type. Originality/value The knowledge of post-processing is essential to enhance the functional performance of the SLM samples. Aging and finish machining were applied for the first time to evaluate the surface integrity of the SLM prepared maraging steel and compared it with the wrought samples.

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“…3 a). In general, the corrosion rates for AM are higher than for the CM samples due to the appearance of local stresses caused by the multiple melt cavities, the dendritic cellular structure and the increased roughness, which results in increased corrosion in these areas 53 . A comparison between the AM + SAT and CM + SAT samples shows the improved corrosion resistance of the conventionally produced material due to its better chemical homogeneity, particularly since pores are not present in such material.…”

Section: Resultsmentioning

confidence: 99%

Use of plasma nitriding to improve the wear and corrosion resistance of 18Ni-300 maraging steel manufactured by selective laser melting

Godec

Podgornik

Kocijan

et al. 2021

Sci Rep

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Abstract18Ni-300 maraging steel manufactured by selective laser melting was plasma nitrided to improve its wear and corrosion resistance. The effects of a prior solution treatment, aging and the combination of both on the microstructure and the properties after nitriding were investigated. The results were compared with conventionally produced 18Ni-300 counterparts subjected to the same heat- and thermo-chemical treatments. The plasma nitriding was performed under the same conditions (temperature of 520 °C and time of 6 h) as the aging in order to investigate whether the nitriding and the aging could be carried out simultaneously in a single step. The aim of this work was to provide a better understanding of the morphology and chemical composition of the nitrided layer in the additive-manufactured maraging steel as a function of the prior heat treatments and to compare the wear and corrosion resistance with those of conventional maraging steel. The results show that nitriding without any prior aging leads to cracks in the compound layer, while nitriding of the prior-heat-treated additive-manufactured maraging steel leads to benefits from the thermochemical treatment in terms of wear and corrosion resistance. Some explanations for the origins of the cracks and pores in the nitride layers are provided.

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Comparison of Additively Manufactured vs. Conventional Maraging Steel in Corrosion-Fatigue Performance after various surface treatments

Cited by 23 publications

References 13 publications

The Influence of Nitriding on the Geometric Accuracy of Parts of Special Technology

The Influence of Nitriding on the Geometric Accuracy of Parts of Special Technology

Effect of aging and finish machining on the surface integrity of selective laser melted maraging steel

Use of plasma nitriding to improve the wear and corrosion resistance of 18Ni-300 maraging steel manufactured by selective laser melting

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