Age hardening and mechanical properties of a 2400 MPa grade cobalt-free maraging steel

He, Yi; Yang, Ke; Sha, Wei; Guo, Ziqi; Li, Kai

doi:10.1007/s11661-006-1089-4

Cited by 33 publications

(8 citation statements)

References 13 publications

(24 reference statements)

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“…Coherent precipitates were observed in Figure 6(d, e). The very small grain size (about 0.31μm), high content of HAGBs (52.5%), together with a great number of crystalline defects (high dislocation density, shown in Figure 5 (b)) promoted the nucleation of the coherent precipitates [32,44]. Coherency hardening originates from atomic volume difference between precipitate and the matrix, which results in a coherency strain.…”

Section: Precipitation Hardening Mechanismmentioning

confidence: 99%

Microstructural characterization and properties of selective laser melted maraging steel with different build directions

Tan

Zhou

Min

et al. 2018

Science and Technology of Advanced Materials

188

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A nearly fully dense grade 300 maraging steel was fabricated by selective laser melting (SLM) additive manufacturing with optimum laser parameters. Different heat treatments were elaborately applied based on the detected phase transformation temperatures. Microstructures, precipitation characteristics, residual stress and properties of the as-fabricated and heat-treated SLM parts were systematically characterized and analyzed. The observed submicron grain size (0.31 μm on average) suggests an extremely high cooling rate up to 10 7 K/s. Massive needle-shaped nanoprecipitates Ni 3 X (X = Ti, Al, Mo) are clearly present in the martensitic matrix, which accounts for the age hardening. The interfacial relations between the precipitate and matrix are revealed by electron microscopy and illustrated in detail. Strengthening mechanism is explained by Orowan bowing mechanism and coherency strain hardening. Building orientation-based mechanical anisotropy, caused by 'layer-wise effect', is also investigated in as-fabricated and heat-treated specimens. The findings reveal that heat treatments not only induce strengthening, but also significantly relieve the residual stress and slightly eliminate the mechanical anisotropy. In addition, comprehensive performance in terms of Charpy impact test, tribological performance, as well as corrosion resistance of the as-fabricated and heat-treated parts are characterized and systematically investigated in comparison with traditionally produced maraging steels as guidance for industry applications.

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Section: Precipitation Hardening Mechanismmentioning

confidence: 99%

Microstructural characterization and properties of selective laser melted maraging steel with different build directions

Tan

Zhou

Min

et al. 2018

Science and Technology of Advanced Materials

188

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“…Materials scientists adjusted artificially the alloy element and chemical compositions, and regulated microstructure and substructure, and with the aid of heat treatment and hot working, a series of novel steels with high performance emerged at a historic moment [9][10][11]. Herein, typical high strength steels contain dual-phase (DP) steel, bainite steel, martensite steel and martensitic aging (maraging) steel [12][13][14], as well as high ductile steel, such as strain-induced martensite (TRIP) steel and strain-induced twinning (TWIP) steel [15,16]. Their yield strength and uniform ductility are shown in Figure 1 in detail.…”

Section: Introductionmentioning

confidence: 99%

The Deformation Characteristics, Fracture Behavior and Strengthening-Toughening Mechanisms of Laminated Metal Composites: A Review

Gao

Zhang

Liu

et al. 2019

Metals

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Multilayer metal composites have great application prospects in automobiles, ships, aircraft and other manufacturing industries, which reveal their superior strength, toughness, ductility, fatigue lifetime, superplasticity and formability. This paper presents the various mechanical properties, deformation characteristics and strengthening–toughening mechanisms of laminated metal matrix composites during the loading and deformation process, and that super-high mechanical properties can be obtained by adjusting the fabrication process and structure parameters. In the macroscale, the interface bonding status and layer thickness can effectively affect the fracture, impact toughness and tensile fracture elongation of laminated metal matrix composites, and the ductility and toughness cannot be fitting to the rule of mixture (ROM). However, the elastic properties, yield strength and ultimate strength basically follow the rule of mixture. In the microscale, the mechanical properties, deformation characteristics, fracture behavior and toughening mechanisms of laminated composites reveal the obvious size effect.

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“…The standard maraging steel contains "18% Ni, 8% Co, 5% Mo and 0.4% Ti", but Ni, Co and Mo are expensive elements, this keeps the steels rather expensive, preventing wider selection and application [3] [4]. Therefore, developing cobalt-free maraging steel with reduced quantities of expensive alloying elements to lower the production cost has been an important direction of maraging steels research [5].…”

Section: Introductionmentioning

confidence: 99%

A Study of Neutron and Gamma-Ray Interaction Properties with Cobalt-Free Highly Chromium Maraging Steel

Kassab

El-Kameesy²,

Eissa³

2015

JMP

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Cobalt-free maraging steels of different compositions have been prepared by electro-slag remelting technique using titanium and chromium instead of cobalt. Neutron removal cross-sections have been calculated, also mass attenuation coefficients and effective electron densities have been determined for the prepared samples in the photon energy range up to 2.8 MeV. Other steel alloys and lead samples have also been investigated for the sake of comparison. The results prove the superiority of cobalt-free maraging steels compared with the other steel types to be used as a proper shielding material in the nuclear field. Among the investigated steels, the steel "0.045%C-13.35%Ni-2.05%Cr-4.5%Mo-0.06%Ti" has the best attenuation properties.

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Age hardening and mechanical properties of a 2400 MPa grade cobalt-free maraging steel

Cited by 33 publications

References 13 publications

Microstructural characterization and properties of selective laser melted maraging steel with different build directions

Microstructural characterization and properties of selective laser melted maraging steel with different build directions

The Deformation Characteristics, Fracture Behavior and Strengthening-Toughening Mechanisms of Laminated Metal Composites: A Review

A Study of Neutron and Gamma-Ray Interaction Properties with Cobalt-Free Highly Chromium Maraging Steel

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