Assessment of the effect of different forms of Inconel 625 alloy feedstock in Plasma Transferred Arc (PTA) additive manufacturing

Cardozo, Eloisa Pereira; Ríos, Sergio; Ganguly, Saibal; D'Oliveira, Ana Sofia

doi:10.1007/s00170-018-2340-z

Cited by 17 publications

(9 citation statements)

References 15 publications

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“…Therefore, already at the beginning of its development, AM technology was adopted for fabricating components made of Inconel 625 [20]. Several AM processes using laser, electron beam, or plasma arc as an energy source for selective melting of Inconel 625 powder were developed [9,20,21,22]. The two categories of AM processes pertain to Inconel 625, namely powder-bed fusion (PBF) and directed energy deposition (DED) [23].…”

Section: Introductionmentioning

confidence: 99%

Precipitates in Additively Manufactured Inconel 625 Superalloy

Dubiel

Sieniawski

2019

Materials

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Laser-based additive manufacturing processes are increasingly used for fabricating components made of nickel-based superalloys. The microstructure development, and in particular the precipitation of secondary phases, is of great importance for the properties of additively manufactured nickel-based superalloys. This paper summarizes the literature data on the microstructure of Inconel 625 superalloy manufactured using laser-based powder-bed fusion and directed energy deposition processes, with particular emphasis on the phase identification of precipitates. The microstructure of Inconel 625 manufactured by laser-based directed energy deposition in as-built condition is investigated by means of light microscopy and transmission electron microscopy. Phase analysis of precipitates is performed by the combination of selected area electron diffraction and microanalysis of chemical composition. Precipitates present in the interdendritic areas of as-built Inconel 625 are identified as MC and M23C6 carbides as well as the Laves phase.

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Section: Introductionmentioning

confidence: 99%

Precipitates in Additively Manufactured Inconel 625 Superalloy

Dubiel

Sieniawski

2019

Materials

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“…16. As the heat flow direction of the solidifying weld pool is almost perpendicular to the surface of the previously welded layer or substrate, this leads to an epitaxial growth of the columnar dendrites almost parallel to the build-up direction, as described in [17]. The seam profile shows a finger-shaped penetration in the middle of the wall structure in each welded layer.…”

Section: Microstructurementioning

confidence: 92%

“…In Ref. [17], wall structures manufactured for GTAWs with the same build-up strategy from S Ni 6625 with average tensile strengths of 722±17 MPa and 42.3±2.4 % for elongation at break are given (see Table 1). As the values for welding voltage or welding speed are not given, the heat input cannot be calculated.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The focus of investigations on Alloy 625 during the manufacture of different structures (thin wall square, round, konus and compact block) in as-deposited and heat-treated conditions is the influence of the process technology mentioned and the associated heat input on macro-and microstructure, formation of intermetallic phases (e.g., Laves phase) and seam irregularities (e.g., hot cracks and pores) and mechanical properties (tensile test by room temperature, hardness) in travel or build direction [15][16][17][18][19][20][21][22]. Current studies are concerned also with the influence of the additive generated microstructure on corrosion resistance [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Effect of different variants of filler metal S Ni 6625 on properties and microstructure by additive layer manufactured using CMT process

et al. 2021

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The influence of arc energy and different filler metal composition on the mechanical properties and macro- and microstructure of additively welded thin-walled structures of Ni-based alloy were investigated using four different variants commercially available solid wire electrodes of type S Ni 6625. As the welding process, the Cold Metal Transfer (CMT) process was used. The heat input and cooling rate were varied by adjusting wire feed and travel speed. The results show that an increase in arc energy leads to longer t10/6 cooling times. This leads to an increase in the dendrite arm spacing and thus to a reduction in the strength values and hardness of the thin-walled structures. The higher Fe-containing variant of S Ni 6625 produces the highest strength and hardness values, while the W-alloyed solid wire electrode produces the lowest values. The porosity in the walled structures was very low, and unacceptable weld defects, hot cracks and lack of fusion did not occur. Segregations occur in all weld metal specimens. While niobium, molybdenum and titanium are the preferred segregations in the Nb-alloyed Ni 6625 type weld metal, only Mo is present in the W-alloyed Ni 6660 type weld metal.

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“…Previous work has shown that, compared to wire, deposition with atomized alloys results in more accurate geometries and a better control of microstructure and properties. For a given additive technology, atomized feedstock requires different processing parameters from those used with wire, due to the differences in melting conditions and also due to the different types of interaction with the component being repaired as explained in details in previous study [19].…”

Section: The Impact Of Feedstock and Process Choice On Multilayers MImentioning

confidence: 99%

Additive Techniques to Refurbish Ni Based Components

et al. 2019

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The attractiveness of additive techniques to refurbish worn components requires the availability of data from different process. This study correlates two additive techniques, Plasma Transferred Arc (PTA-AM) and Direct Laser Deposition (DLD), using IN 625 wire. Specific features of each technique are discussed regarding their potential use to recover geometry and properties of worn components. Multilayers were processed with each technique on a section of a blade and the interaction between materials together with the effect of post deposition heat treatment were characterized. Results show that there are differences in the final microstructure and in the interaction with the part being refurbished imposed by the additive technique used. Competitive changes can be made by changing the feedstock. PTA-AM using powder material exhibits a microstructure that approaches that obtained in DLD using wire.

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Assessment of the effect of different forms of Inconel 625 alloy feedstock in Plasma Transferred Arc (PTA) additive manufacturing

Cited by 17 publications

References 15 publications

Precipitates in Additively Manufactured Inconel 625 Superalloy

Precipitates in Additively Manufactured Inconel 625 Superalloy

Effect of different variants of filler metal S Ni 6625 on properties and microstructure by additive layer manufactured using CMT process

Additive Techniques to Refurbish Ni Based Components

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