Precipitates in Additively Manufactured Inconel 625 Superalloy

Dubiel, B.; Sieniawski, J.

doi:10.3390/ma12071144

Cited by 57 publications

(17 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ref 1,2,[20][21][22][23][24][25][26][27][28][29][30]. It has been shown that at a temperature range of 550-900°C, precipitates of the c¢, c¢¢, d and Ni 2 (Cr,Mo) Laves phases, as well as MC, M 6 C and M 23 C 6 carbides, can be present in Inconel 625 fabricated using different methods.…”

mentioning

confidence: 99%

Microstructural Changes in Inconel 625 Alloy Fabricated by Laser-Based Powder Bed Fusion Process and Subjected to High-Temperature Annealing

Gola

Dubiel

Kalemba–Rec

2020

J. of Materi Eng and Perform

Self Cite

View full text Add to dashboard Cite

The microstructure of the laser powder bed additively manufactured Inconel 625 in post-build stress-relief annealed condition and subsequently annealed at a temperature of 600°C for 5, 100 and 500 h was investigated by means of light microscopy as well as scanning and transmission electron microscopy. Stressrelieved Inconel 625 exhibited fine cellular-dendritic microstructure characterized by the high dislocation density. Selected area electron diffraction studies allowed to demonstrate that already after 5 h of annealing at a temperature of 600°C, precipitation of the c¢¢ phase in the form of coherent nanoparticles occurred. With the prolongation of the duration of annealing at a temperature of 600°C from 5 to 500 h, the gradual dissolution of intercellular areas and decrease in the dislocation density were accompanied by enhanced precipitation of the c¢¢ phase nanoparticles.

show abstract

mentioning

confidence: 99%

Microstructural Changes in Inconel 625 Alloy Fabricated by Laser-Based Powder Bed Fusion Process and Subjected to High-Temperature Annealing

Gola

Dubiel

Kalemba–Rec

2020

J. of Materi Eng and Perform

Self Cite

View full text Add to dashboard Cite

show abstract

“…Defects occur in the material not only in the wire or powder deposition methods; some inclusions are identified in the developed semi-hybrid method as well. However, in this case, they are revealed in the buffer layer, and are related to the oxidation process ( Figure 6 ); they are most probably (Ti,Nb,Al) x O y type oxides [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Semi-Hybrid CO2 Laser Metal Deposition Method with Inter Substrate Buffer Zone

et al. 2021

View full text Add to dashboard Cite

This article presents the results of the metal deposition process using additive materials in the form of filler wire and metal powder. An important problem in wire deposition using a CO2 laser was overcome by using a combination of the abovementioned methods. The deposition of a multicomponent alloy—Inconel 625—on a basic substrate such as structural steel is presented. The authors propose a new approach for stopping carbon and iron diffusion from the substrate, by using the Semi-Hybrid Deposition Method (S-HDM) developed by team members. The proposed semi-hybrid method was compared with alternative wire and powder deposition using laser beam. Differences of S-HDM and classic wire deposition and powder deposition methods are presented using metallographic analysis, within optic and electron microscopy. Significant differences in the obtained results reveal advantages of the developed method compared to traditional deposition methods. A comparison of the aforementioned methods performed using nickel based super alloy Inconel 625 deposited on low carbon steel substrate is presented. An alternative prototyping approach for an advanced high alloy materials deposition using CO2 laser, without the requirement of using the same substrate was presented in this article. This study confirmed the established assumption of reducing selected components diffusion from a substrate via buffer layer. Results of metallographic analysis confirm the advantages and application potential of using the new semi-hybrid method for prototyping high alloy materials on low alloy structural steel substrate.

show abstract

“…The EDX analysis showed that, with respect to the γ‐Ni, the irregular shaped particles have a higher content of Mo, Nb, and Si (Figure 12 d), whereas the smaller round ones are richer in Nb and Mo, and contain traces of Ti (Figure 12e). Different authors such as Rombouts et al, [ 1 ] Silva et al, [ 31 ] Dubiel et al, [ 32 ] and Verdi et al [ 33 ] identified the first as Laves phase, with hexagonal crystal structure and composition type AB 2 of general formula (Fe,Cr,Mn,Si) 2 (Mo,Ti,Nb). The formation of this phase is promoted by the presence of Si and Nb in the alloy.…”

Section: Resultsmentioning

confidence: 99%

Effect of Manufacturing Strategy on the Toughness Behavior of Inconel 625 Laser Metal Deposited Parts

et al. 2021

View full text Add to dashboard Cite

Nickel‐based superalloys are broadly used to produce high value added components in industrial sectors such as oil and gas, aerospace, energy production, etc. Additive manufacturing represents a viable alternative family of processes for near‐net shape fabrication. Herein, it presents results related to the toughness behavior of laser metal deposited Inconel 625 samples under impact tests, in the as‐deposited and post heat‐treated condition. Laser metal deposition is used to build Inconel 625 Charpy impact tests samples in two different orientations: vertical and horizontal. Half of the samples for each build orientation are subjected to annealing heat treatment whereas the remainder are kept as‐built. Distinct toughness behaviors are observed, with the vertical builds exhibiting a higher absorbed energy than the horizontal one. Furthermore, a decrease in absorbed energy after heat‐treatment is observed in the Charpy impact test results for both deposition orientation samples. A similar behavior is observed through Vickers microhardness measurements. However, in this case, although the horizontal deposited samples result always harder than the vertical ones, the heat treatment reduces the hardness difference between the two deposition directions. The obtained results highlight the influence of the manufacturing strategy on the toughness of the final components.

show abstract

Precipitates in Additively Manufactured Inconel 625 Superalloy

Cited by 57 publications

References 35 publications

Microstructural Changes in Inconel 625 Alloy Fabricated by Laser-Based Powder Bed Fusion Process and Subjected to High-Temperature Annealing

Microstructural Changes in Inconel 625 Alloy Fabricated by Laser-Based Powder Bed Fusion Process and Subjected to High-Temperature Annealing

Semi-Hybrid CO2 Laser Metal Deposition Method with Inter Substrate Buffer Zone

Effect of Manufacturing Strategy on the Toughness Behavior of Inconel 625 Laser Metal Deposited Parts

Contact Info

Product

Resources

About