Microstructure and physical properties of a Ni/Fe-based superalloy processed by Selective Laser Melting

Domashenkov, Alexey; Plotnikova, A. F.; Movchan, Igor; Bertrand, Ph.; Peillon, Nathalie; Desplanques, Benjamin; Saunier, Sébastien; Desrayaud, Christophe

doi:10.1016/j.addma.2017.03.008

Cited by 8 publications

(4 citation statements)

References 31 publications

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“…[36][37][38][39][40][41] At present, only AlSi10Mg, TiAl6V4 and CoCr alloys, can be reliably printed, [42][43][44] whereas Fe-based and Ni-based alloys have been fabricated by SLM recently. [45][46][47][48][49] The quality of the printed parts from the SLM process is the most challenging issue to be resolved, and there may be multiple factors for this: (1) the rapid cooling rate during solidification results in the formation of nonequilibrium phases with a large range of compositions 50-52 ; (2) the molten pool boundary inside the parts, as well as the pores, cracks and rough surfaces, can lead to a severe drop in plasticity. These sites could also be preferential areas for corrosion.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of metallic materials fabricated by selective laser melting

Kong

2019

npj Mater Degrad

182

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Additive manufacturing is an emerging technology that challenges traditional manufacturing methods. However, the corrosion behaviour of additively manufactured parts must be considered if additive techniques are to find widespread application. In this paper, we review relationships between the unique microstructures and the corresponding corrosion behaviour of several metallic alloys fabricated by selective laser melting, one of the most popular powder-bed additive technologies for metals and alloys. Common issues related to corrosion in selective laser melted parts, such as pores, molten pool boundaries, surface roughness and anisotropy, are discussed. Widely printed alloys, including Ti-based, Al-based and Fe-based alloys, are selected to illustrate these relationships, and the corrosion properties of alloys produced by selective laser melting are summarised and compared to their conventionally processed counterparts.

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Section: Introductionmentioning

confidence: 99%

Corrosion of metallic materials fabricated by selective laser melting

Kong

2019

npj Mater Degrad

182

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“…Shi et al (2017), Thijs et al (2010), Yang et al (2016a, 2016b) and Gong et al (2015) studied the mechanical properties of the parts manufactured by Ti-6Al-4V alloy. Other metal alloys, such as Inconel-718 alloy, Ni/Fe-based superalloy and some Al alloys, have also been studied (Lu et al , 2015; Wang et al , 2016; Domashenkov et al , 2017; Thijs et al , 2013; Zhang et al , 2016; Leudersa et al , 2017; Wu et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

A study on the surface quality of the 3D printed parts caused by the scanning strategy

Han

Mao³

et al. 2019

RPJ

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Purpose The purpose of this paper is to mainly focus on the relationship between the scanning strategy and surface quality. Surface quality, including surface roughness and flatness, is important for printed parts. So this paper optimizes the surface quality by changing the scanning strategy. Design/methodology/approach This paper is based on the phenomenon after the printed parts. A clear trend can be seen that the surface roughness on the side face shows a clear zigzag shape, so an optimized scanning strategy is used. Surface roughness in measured in macrostructure first by Mitutoyo and the flatness is measured by Hexagon Metrocogy. After that, microstructure on the side face is seen by RTEC to explain this phenomenon. Findings The surface quality on the side face shows a significant optimize by changing the scanning strategy. The surface quality on the positive face has some optimization to some degree. Originality/value This paper determines the relationship between the surface roughness on the side face and the scanning strategy. Few studies focus on the surface roughness, especially on the side face. Some studies try to optimize the surface roughness on the positive face. However, researchers always neglect the surface roughness on the side face. 2. This paper measures not only the surface roughness, but also the flatness. Surface roughness has a significant impact on the surface quality. However, it still has some limitations. Flatness is also measured to make this paper more representative. 3. This paper explains why scanning strategy can affect the surface quality. These images explain the research better and not just at the theoretical level.

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“…Thus, some postprocessing is usually required to address the above issues, such as machining, heat treatment and mechanical treatment on the WAAM wall surfaces. Also, the repetitive cycles of heating and cooling during the manufacturing process can lead to microstructural variations and anisotropic behaviour of the WAAM part [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Fatigue life assessment of wire arc additively manufactured ER100S-1 steel parts

et al. 2023

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The aim of this work was to examine uniaxial, torsion, and multi-axial fatigue characteristics of ER100S-1 low carbon steel specimens fabricated with wire arc additive manufacturing (WAAM) technique, a subcategory of directed energy deposition (DED). Two distinct specimen orientations were tested—vertical and horizontal, extracted perpendicular and parallel to the WAAM deposited layers, respectively. Fracture surfaces of the tested specimens were analysed under scanning electron microscope (SEM) to observe fracture mechanisms corresponding to different specimen orientations, different fatigue loading conditions, and to interpret the fatigue results obtained from the tests. Finally, the obtained stress–life results were compared with the fatigue data available in the literature for a series of wrought and WAAM-built structural steel specimens. Moreover, the S–N curves obtained in this study were evaluated against the fatigue design curve recommended for offshore marine welded structures in DNV standard. Test results have shown advantageous characteristics of WAAM-built ER100S-1 specimens compared with behaviours of other structural steels and conservative prediction of its fatigue life by the design curve available in the DNV standard.

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Microstructure and physical properties of a Ni/Fe-based superalloy processed by Selective Laser Melting

Cited by 8 publications

References 31 publications

Corrosion of metallic materials fabricated by selective laser melting

Corrosion of metallic materials fabricated by selective laser melting

A study on the surface quality of the 3D printed parts caused by the scanning strategy

Fatigue life assessment of wire arc additively manufactured ER100S-1 steel parts

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