Outstanding strength-ductility synergy in Inconel 718 superalloy via laser powder bed fusion and thermomechanical treatment

Liu, Bo; Ding, Yutian; Xu, J. Q.; Gao, Yubi; Wang, Xingmao; Zhang, Hongfei; Hu, Yong; Sun, Fuhao

doi:10.1016/j.addma.2023.103491

Cited by 11 publications

(3 citation statements)

References 63 publications

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“…Undesirable Laves phase is mainly generated due to the high heat input in the welding process and slow cooling rates [10,11]. Niobium rich Laves phase in Inconel 718 can reduce the material properties [7] in heat affected zone (HAZ) [12,13]. This is the reason for lower heat input when welding Inconel 718.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the AM microstructure, the phase formation during welding differs from traditionally manufactured Inconel 718. Post-weld heat treatments can be used to improve the situation after welding, and the research shows that the standard 980°C heat treatments significantly reduce the Laves phase and improve the properties of the weld [5,12,17,18]. Higher solution temperatures can be more beneficial.…”

Section: Introductionmentioning

confidence: 99%

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Effect of post-weld heat treatment on heat affected zone microstructure of additively manufactured Inconel 718

Lindqvist,

Kivirasi,

Lipiäinen

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Laser powder bed fusion for metals is a method of producing end use components for industrial use. Powder bed fusion machines are relatively small, and are usually used to create only the critical part of the larger assembly. Therefore, L-PBF manufactured parts must be attached to each other for example by welding. The industrial world needs to be able to join the printed superalloy components to the traditionally manufactured components to reach better corrosion, wear and/or heat resistance in selected parts in an assembly. The problem is that there is limited amount of information about the suitable welding parameter values for these applications. This study examines how the standard heat treatment cycles affect to the quality of the weld, and if the post-heat treatment is reducing undesired phases in the heat affected zone. Test has shown that post heat treatment highlights cuboidal shaped niobium rich carbides throughout the material to the heat affected zone grain boundaries.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of post-weld heat treatment on heat affected zone microstructure of additively manufactured Inconel 718

Lindqvist,

Kivirasi,

Lipiäinen

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Introduction Dissimilar joints, for example of 316L and IN718, are commonly used in aerospace and power industries [1]. The research done so far of welded additive manufacturing (AM) components is still very sparse and must be continued further to provide enough information for the industry [2,3]. In the Finnish industry the most common large parts are manufactured, because it is not feasible to produce those fully with AM.…”

mentioning

confidence: 99%

The effects of laser welding parameters on weldability and quality of the microstructure of additively manufactured Inconel 718-316L joints

Kivirasi,

Lindqvist,

Lipiäinen

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Additive manufacturing of metals is a way of producing high-quality end-use parts. Technical alloys, for example Inconel 718, can be used to obtain a lot of benefits for example wear, corrosion, and heat resistance. Laser welding of Inconel 718 is a standard process, but there is rather limited amount of information of welding of additively manufactured nickel superalloys to the additively manufactured stainless steel. The process parameters need to be considered in laser welding. Undesired microstructure can occur due to wrong heat input during the welding process. This study examines laser welding of additively manufactured Inconel 718-316L parts and the effects of the welding parameters to the quality of the weld by analysing microstructure from the heat affected zone. This is done to achieve better part quality more cost efficiently compared to traditionally produced parts and to optimize the welding parameters. It is not feasible to manufacture the full large structure with IN718 and AM could be used to manufacture just the functional parts of the assembly. Tests have shown that welding heat input and cooling time affect to the quality. Inconel 718 hardness decrease across the fused zone because of the mixing of different elements in the molten weld pool. Laser welding highlights cuboidal shaped niobium rich carbides throughout the material to the heat affected zone grain boundaries on Inconel side.

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Synergic effects of scanning pattern and heat treatment on the microstructure-hot tensile behavior relationships of powder bed fusion-laser beam manufactured Hastelloy X

Kangazian,

Kermanpur,

Shamanian

et al. 2024

J Mater Sci

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Outstanding strength-ductility synergy in Inconel 718 superalloy via laser powder bed fusion and thermomechanical treatment

Cited by 11 publications

References 63 publications

Effect of post-weld heat treatment on heat affected zone microstructure of additively manufactured Inconel 718

Effect of post-weld heat treatment on heat affected zone microstructure of additively manufactured Inconel 718

The effects of laser welding parameters on weldability and quality of the microstructure of additively manufactured Inconel 718-316L joints

Synergic effects of scanning pattern and heat treatment on the microstructure-hot tensile behavior relationships of powder bed fusion-laser beam manufactured Hastelloy X

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