Development and characterization of a novel maraging steel fabricated by laser additive manufacturing

Xu, T.Z.; Zhang, S.; Du, Y.; Wu, C.L.; Zhang, C.H.; Sun, X.Y.; Chen, H.T.; Chen, J.

doi:10.1016/j.msea.2023.145975

Cited by 22 publications

(1 citation statement)

References 46 publications

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“…В работе [13] была исследована МСС с высоким содержанием молибдена -15 %. Сталь подвергали старению при температуре t = 530 °С для инициации дисперсионного упрочнения.…”

Section: Acknowledgmentsunclassified

Structure and mechanical properties of PR-03N18K9M5TYu steel grade fabricated by selective laser melting and post-processing

Kayasova,

Baskov,

Lobova

et al. 2024

Izv.VUZ. Tsvet. Met.

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We fabricate samples of PR-03N18K9M5TYu steel (equivalent to ChS4) using selective laser melting (SLM) in a nitrogen atmosphere. Our research focused on the influence of hot isostatic pressing (HIP) combined with heat treatment (HT), specifically hardening and aging, on the steel's structure and its physical and mechanical properties (σucs, σys, δ, ψ). Through tensile testing, we evaluated the impact of post-processing treatments (HIP followed by HT) on the material's strength. We also assessed how different post-processing protocols affected residual porosity. Our findings indicate that samples exhibiting the highest strength and plastic properties correspond to those with the least structural defects and minimal residual porosity. In-depth microstructural analysis revealed that the optimal structure–a fine-grained, homogeneous configuration–is achieved via the combined application of SLM, HIP, and subsequent HT. The improvement in mechanical properties can be primarily attributed to the dispersed hardening effect, which is a consequence of the precipitation of the superfluous Ni3Ti phase. Fractographic examination revealed that the post-processing leads to a ductile and dimple fracture, occurring through mechanisms of shearing and detachment, giving rise to mixed-type fractures. The samples that displayed superior mechanical properties were characterized by a homogenous ductile intergranular fracture surface with clear evidence of plastic deformation. We measured the hardness (Н), modulus of elasticity (Е), and elastic recovery via indentation methods. The post-processing treatments notably enhanced material hardness and elastic modulus, with an increase from H = 4.6 GPa and E = 194 GPa in the sample post-HIP to H = 8.5 GPa and E = 256 GPa following HIP coupled with hardening and aging.

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Section: Acknowledgmentsunclassified

Structure and mechanical properties of PR-03N18K9M5TYu steel grade fabricated by selective laser melting and post-processing

Kayasova,

Baskov,

Lobova

et al. 2024

Izv.VUZ. Tsvet. Met.

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Effect of Solution Aging Heat Treatment on Tribological Properties of Selective Laser Melted WC/18Ni300 Composite

Teng,

Fan,

Yao

et al. 2024

steel research int.

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Different contents of WC particle‐reinforced 18Ni300 composites are prepared by selective laser melting method, and the tribological properties are comparatively studied before and after solution aging heat treatment. The results show that a part of WC particles are dissolved, and no obvious pore defects appear. With the increase of WC content, the microstructure gradually transforms from cellular and fine columnar α‐Fe martensite to γ‐Fe austenite. After solution aging heat treatment, the phase is transformed into acicular martensite. The grain size significantly decreases, and the Vickers hardness increases. The grain size decreases and the hardness increases with increasing WC contents. For the as‐built composite, the friction coefficient first decreases and then increases, and the wear rate first increases and then decreases with the increase of WC content. With WC content increasing, the wear rate first decreases and then increases. After heat treatment, the tribological properties are improved. The groove of the specimens before heat treatment is deep with large delaminated craters, and the wear mechanism is dominated by adhesive and abrasive wear. The grooves become shallower, and the adhesive trace becomes lighter after heat treatment. The wear mechanism is mainly adhesive wear and abrasive wear, accompanying with oxidative wear.

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Microstructure and Wear Characteristics of Laser-Clad CoCrFeMnNiNb0.3 High-Entropy Alloy Coating

Zhou,

Zhao,

Zhu

2024

J. of Materi Eng and Perform

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Development and characterization of a novel maraging steel fabricated by laser additive manufacturing

Cited by 22 publications

References 46 publications

Structure and mechanical properties of PR-03N18K9M5TYu steel grade fabricated by selective laser melting and post-processing

Structure and mechanical properties of PR-03N18K9M5TYu steel grade fabricated by selective laser melting and post-processing

Effect of Solution Aging Heat Treatment on Tribological Properties of Selective Laser Melted WC/18Ni300 Composite

Microstructure and Wear Characteristics of Laser-Clad CoCrFeMnNiNb0.3 High-Entropy Alloy Coating

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