Mechanical Properties and Fracture of High-Strength Maraging Steel Fabricated by Selective Laser Melting

Геров, М. В.; Kayasova, A. O.; Колмаков, А. Г.; Prosvirnin, D. V.; Терентьев, В. Ф.

doi:10.1134/s0036029522040139

Russ. Metall.

2022

DOI: 10.1134/s0036029522040139

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Mechanical Properties and Fracture of High-Strength Maraging Steel Fabricated by Selective Laser Melting

М. В. Геров

A. O. Kayasova²,

А. Г. Колмаков³

et al.

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Cited by 3 publications

References 28 publications

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Mössbauer study of thermal behavior of CL20ES and CL50WS steel powders used in selective laser melting

Ivanova,

Kořenek,

Mashlan

et al. 2023

Chem. Pap.

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The phase and structural changes of steel powders CL20ES and CL50WS used in additive manufacturing were studied by Mössbauer spectroscopy and X-ray diffraction. Investigated powders were annealed in the temperature range 500 °C–1100 °C in oxidizing and inert atmosphere. Annealing in an oxidizing atmosphere resulted in the formation of different iron oxides in both steel powders depending on the annealing temperature. In addition, a phase change of ferrite to austenite was identified when annealing CL50WS steel powder in an oxidizing atmosphere. This phase change was confirmed by annealing given CL50WS steel powder in an inert nitrogen atmosphere. The transformation of austenite to ferrite phase was observed only, when annealing CL20ES steel powder in an inert atmosphere at 1100 °C. Morphological changes on the surface of the spherical powders were observed by scanning electron microscopy.

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Mössbauer study of thermal behavior of CL20ES and CL50WS steel powders used in selective laser melting

Ivanova,

Kořenek,

Mashlan

et al. 2023

Chem. Pap.

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show abstract

Additive manufacturing of ultra-high strength steels: A review

Yang

Gong

et al. 2023

Journal of Alloys and Compounds

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Features of the impact of hot isostatic pressing and heat treatment on the structure and properties of maraging steel obtained by selective laser melting method

Kayasova

Левашов

2022

Izv. VUZ. Poroshk. Met.

Self Cite

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Using the SLM method in a nitrogen blanket with heating to a temperature of 200 °C, samples were obtained at a position of 0° against the build plate. The effect of the hot isostatic pressing (HIP) and heat treatment (HT: hardening + aging) on the structure and mechanical properties of maraging steel CL50 WS was studied (the Russian analogue is ChS4 grade). To analyze the effect of post-processing on the strength characteristics (σb, σ0,2, δ, ψ), tensile tests were conducted. Their results indicated high values of strength and ductility. It has been established that as a result of HT in the steel structure, in addition to α-Fe, γ-Fe, dispersed precipitates of the NiTi3 strengthening phase are formed, the identification of which was carried out by high-resolution transmission electron microscopy. Through the NiTi3 intermetallic phase, the steel has acquired increased tensile strength and yield strength required for the production of critical components and parts for highly loaded turbomachine disks. The change in the porosity of the samples before and after the HIP was analyzed. The microstructure of the samples and the changes that occur under the influence of various post-processing options are studied. The fine-grained homogeneous structure obtained by combining the SLM, HIP and HT provided optimal strength and ductility. Analysis of fractures after mechanical testing showed that the samples after postprocessing are destroyed according to the viscous-pitting mechanism with the formation of a neck.

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Mechanical Properties and Fracture of High-Strength Maraging Steel Fabricated by Selective Laser Melting

Cited by 3 publications

References 28 publications

Mössbauer study of thermal behavior of CL20ES and CL50WS steel powders used in selective laser melting

Mössbauer study of thermal behavior of CL20ES and CL50WS steel powders used in selective laser melting

Additive manufacturing of ultra-high strength steels: A review

Features of the impact of hot isostatic pressing and heat treatment on the structure and properties of maraging steel obtained by selective laser melting method

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