High strain rate torsional response of maraging steel parts produced by laser powder bed fusion techniques: Deformation behavior and constitutive model

Dehgahi, Shirin; Pirgazi, Hadi; Sanjari, Mehdi; Seraj, P.; Odeshi, A.G.; Kestens, Léo; Mohammadi, Mohsen

doi:10.1016/j.mechmat.2022.104296

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…Maraging steels are produced by a two-stage vacuum melting process in which the chemical composition and impurity content are strictly controlled [ 1 ]. With a proper ageing treatment, ultra-high strength MS can be produced, suitable for the aerospace-, tool- and die-making industries [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

et al. 2023

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In this article, hot compression tests on the additively produced 18Ni-300 maraging steel 18Ni-300 were carried out on the Gleeble thermomechanical simulator in a wide temperature range (900–1200 °C) and at strain rates of 0.001 10 s−1. The samples were microstructurally analysed by light microscopy and scanning electron microscopy with electron backscatter diffraction (EBSD). This showed that dynamic recrystallization (DRX) was predominant in the samples tested at high strain rates and high deformation temperatures. In contrast, dynamic recovery (DRV) dominated at lower deformation temperatures and strain rates. Subsequently, the material constants were evaluated in a constitutive relationship using the experimental flow stress data. The results confirmed that the specimens are well hot workable and, compared with the literature data, have similar activation energy for hot working as the conventionally fabricated specimens. The findings presented in this research article can be used to develop novel hybrid postprocessing technologies that enable single-stage net shape forging/forming of AM maraging steel parts at reduced forming forces and with improved density and mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Hot Deformation Behaviour of Additively Manufactured 18Ni-300 Maraging Steel

et al. 2023

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“…Maraging steels are highly interesting due to their ultra-high strength [1][2][3][4][5][6][7], crucial in contemporary frontier technology fields such as aerospace, high-speed trains, deep-sea technology, advanced nuclear energy, and clean energy [8][9][10][11][12]. For example, Wuriti et al [13] investigated the M250 maraging steel pressure vessels for aerospace applications; Dehgahi et al [14] explored high strain-rate loadings performance of maraging steel parts in industries such as high-speed train; Jha et al [15] researched the failure analysis of M250 maraging steel in solid propulsion system. Moreover, maraging steels are used in applications such as shielding materials in the nuclear field [16], components for thermal, wind, and hydropower generation equipment [17].…”

Section: Introductionmentioning

confidence: 99%

Integrated Computing Accelerates Design and Performance Control of New Maraging Steels

Chen

Zhu

Liu³

et al. 2023

Materials

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This paper mainly used database technology, machine learning, thermodynamic calculation, experimental verification, etc., on integrated computational materials engineering. The interaction between different alloying elements and the strengthening effect of precipitated phases were investigated mainly for martensitic ageing steels. Modelling and parameter optimization were performed by machine learning, and the highest prediction accuracy was 98.58%. We investigated the influence of composition fluctuation on performance and correlation tests to analyze the influence of elements from multiple perspectives. Furthermore, we screened out the three-component composition process parameters with composition and performance with high contrast. Thermodynamic calculations studied the effect of alloying element content on the nano-precipitation phase, Laves phase, and austenite in the material. The heat treatment process parameters of the new steel grade were also developed based on the phase diagram. A new type of martensitic ageing steel was prepared by selected vacuum arc melting. The sample with the highest overall mechanical properties had a yield strength of 1887 MPa, a tensile strength of 1907 MPa, and a hardness of 58 HRC. The sample with the highest plasticity had an elongation of 7.8%. The machine learning process for the accelerated design of new ultra-high tensile steels was found to be generalizable and reliable.

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