Fracture behaviour of additively manufactured MS1-H13 hybrid hard steels

Cyr, Edward; Asgari, Hamed; Shamsdini, Seyed Amir Reza; Purdy, Mackenzie; Hosseinkhani, Keyvan; Mohammadi, Mohsen

doi:10.1016/j.matlet.2017.10.097

Cited by 51 publications

(24 citation statements)

References 8 publications

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“…Recent researches successful displayed the complete feasibility of SLM high laser reflective copper alloy [12], refractory pure tungsten [13], functional multi-materials [14], and graded lattice structures [15]. Consequently, the SLM technology is an efficient method to expand application circumstances and fields of MS, such as conformal cooling injection tooling [16,17], MS-based functional multi-materials [14,18], and geometrically complex aircraft components which need excellent mechanical properties but small quantities.…”

Section: Introductionmentioning

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

201

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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: Introductionmentioning

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

201

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“…In number of papers [36][37][38][39]49] it was demonstrated that SLM technique (EOS © DMLS) can be effectively used for hybrid additive manufacturing of steel components for complex big size dies with internal cooling channel system. Figure 3 illustrates the hybrid AM approach where the substrate part can be manufactured by traditional subtractive manufacturing, and the upper part with internal system of cooling channels À by additive manufacturing.…”

Section: Powder Bed Hybrid Additive Manufacturingmentioning

confidence: 99%

“…Investigation of hybrid additive manufacturing of maraging and tool steel has been already reported by several papers [37][38][39]49,61,65]. SLM / DMLS was used for 3D printing.…”

Section: Maraging and Tool Steelsmentioning

confidence: 99%

Hybrid additive manufacturing of steels and alloys

Popov

Fleisher

2020

Manufacturing Rev.

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Hybrid additive manufacturing is a relatively modern trend in the integration of different additive manufacturing techniques in the traditional manufacturing production chain. Here the AM-technique is used for producing a part on another substrate part, that is manufactured by traditional manufacturing like casting or milling. Such beneficial combination of additive and traditional manufacturing helps to overcome well-known issues, like limited maximum build size, low production rate, insufficient accuracy, and surface roughness. The current paper is devoted to the classification of different approaches in the hybrid additive manufacturing of steel components. Additional discussion is related to the benefits of Powder Bed Fusion (PBF) and Direct Energy Deposition (DED) approaches for hybrid additive manufacturing of steel components.* e-mail: vvp@technion.ac.il Rev. 7, 6 (2020) This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Manufacturing

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“…The Equation (9) is further generalised for the ratio of the initial compositions of the powder and building platform alloy β = c pb,i /c powder,i . Figure 8 shows the influence of the dilution ratio and the depth ratio on the mixture layer according to Equation (10). An increased mixture layer leads to a flatter slope of the composition profile.…”

Section: Implications For Process Designmentioning

confidence: 99%

“…Furthermore, dissimilar welds with hot cracks and intermetallic phases were manufactured such as AlSi10Mg/UNS C18400 copper alloy [8] and Al/316L both with LPBF [9]. Cyr et al performed LPBF with maraging steel powder on a tool steel building platform for a single set of parameters and tested the mechanical performance of the combination [10]. This combination might be prone to segregation and deterioration of corrosion resistance because of the difference in the steels composition.…”

Section: Introductionmentioning

confidence: 99%

Dilution Ratio and the Resulting Composition Profile in Dissimilar Laser Powder Bed Fusion of AlSi10Mg and Al99.8

Böhm

Werz

Weihe

2020

Metals

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A variant of a hybrid manufacturing process combines the benefits of laser powder bed fusion (LPBF) and conventional manufacturing. Hybrid manufacturing can result in dissimilar material combinations which are prone to process errors. This study is motivated by the future application of a hybrid manufacturing variant and focusses on dissimilar aluminium alloys were hot cracks are the dominant process errors. A theoretical model was derived for the composition profile based on the dilution ratio known from fusion welding. The theory was validated with penetration depth measurements and energy-dispersive X-ray spectroscopy line scans on samples manufactured by LPBF (powder AlSi10Mg, building platform Al99.8 and line energies Pv−1 = 0.26–0.42 J·mm−1). A material combination with a low hot crack susceptibility was chosen to establish the theory. The results suggest that the dilution ratio is dependent on the penetration depth and the layer thickness. The used line energies result in a dilution ratio of 67–86% which results in 2–6 re-melted and mixed layers per added layer. A specific process design metric, the mixture height, is proposed to estimate the spatial effect of the dilution. The results can be used to adjust process parameters to lessen the effect of process errors in dissimilar hybrid manufacturing and increase mechanical performance.

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Fracture behaviour of additively manufactured MS1-H13 hybrid hard steels

Cited by 51 publications

References 8 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

Hybrid additive manufacturing of steels and alloys

Dilution Ratio and the Resulting Composition Profile in Dissimilar Laser Powder Bed Fusion of AlSi10Mg and Al99.8

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