Effect of deposition strategy on the microstructure and mechanical properties of Inconel 625 superalloy fabricated by pulsed plasma arc deposition

Xu, Fengyu; Lv, Yaohui; Xu, Bin; Liu, Y.X.; Shu, Fengyuan; He, Peng

doi:10.1016/j.matdes.2012.07.013

Cited by 111 publications

(36 citation statements)

References 24 publications

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“…where both Laves phase and NbC were formed during solidification [1,2,[4][5][6][7][8][9][10]. Once again, Laves phase was found to be enriched by the both Nb and Mo.…”

Section: Similar Observations Were Made In Various Other Publicationsmentioning

confidence: 99%

“…37. The type of TCP and carbide phases precipitated in IN625 are well documented to be the Laves and NbC phases respectively [1][2][3][4][5][6][7][8][9][10] and hence these shall not be discussed in detail here. The result of an initial EDS analysis of the phase precipitated in the IN686CPT weld metal demonstrated it was enriched in both molybdenum and tungsten, while being depleted in nickel and iron as shown in Figures 7A and 7B.…”

Section: Element Segregation and Tcp/carbide Phase Formationmentioning

confidence: 99%

“…However, the microstructural evolution of the weld metal upon solidification is not well documented and there has been no investigation into the segregation behaviour of alloying additions when used for dissimilar weld applications. In the present study, the microstructural evolution of weld metal produced by IN686CPT is compared to that of Inconel 625 (IN625), whose solidification behaviour has been widely reported [1][2][3][4][5][6][7][8][9][10].…”

mentioning

confidence: 99%

“…Welding presents an additional metallurgical challenge associated with nickel base superalloys; due to the variable parameters which may be employed and an elevated cooling rate (relative to equilibrium cooling) the microstructure is highly changeable and therefore difficult to predict. Given that both the mechanical and corrosion properties of the weld metal are governed by the microstructure and its evolution upon solidification, there have been extensive studies into the behaviour of nickel base superalloy weld metals and the effect of their alloying additions on the solidification behaviour [1][2][3][4][5][11][12][13][14]. 5.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Microstructural Evolution of Inconel 625 and Inconel 686CPT Weld Metal for Clad Carbon Steel Linepipe Joints: A Comparator Study

Maltin

Galloway

Mweemba

2014

Metall Mater Trans A

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The effect of iron dilution on the elemental segregation of alloying elements in nickel based filler metals. AbstractMicrostructural evolution of Inconel 625 and Inconel 686CPT filler metals, used for the fusion welding of clad carbon steel linepipe, has been investigated and compared. The effects of iron dilution from the linepipe parent material on the elemental segregation potential of the filler metal chemistry has been considered. The results obtained suggest that, in Inconel 686CPT weld metal, the segregation of tungsten is a function of the level of iron dilution from the parent material. The data presented suggest that the incoherent phase precipitated in the Inconel 686CPT weld metal has a morphology that is dependent on tungsten enrichment and, therefore, iron dilution. Furthermore, in the same weld metal a continuous network of finer precipitates was observed. The Charpy impact toughness of each filler metal was evaluated and the results highlighted the superior impact toughness of the Inconel 625 weld metal over that of Inconel 686CPT.

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“…where both Laves phase and NbC were formed during solidification [1,2,[4][5][6][7][8][9][10]. Once again, Laves phase was found to be enriched by the both Nb and Mo.…”

Section: Similar Observations Were Made In Various Other Publicationsmentioning

confidence: 99%

Section: Element Segregation and Tcp/carbide Phase Formationmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Microstructural Evolution of Inconel 625 and Inconel 686CPT Weld Metal for Clad Carbon Steel Linepipe Joints: A Comparator Study

Maltin

Galloway

Mweemba

2014

Metall Mater Trans A

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“…These outstanding properties primarily issue from the solid solution hardening of molybdenum and niobium in its austenitic fcc matrix [4,5] . The favorable mechanical properties are also caused by precipitation hardening of fine metastable γ″ (Ni 3 Nb) after annealing over a long period at a high temperature [6] . Additionally, the presence of chromium and nickel protect it against oxidizing environment, while molybdenum and nickel resist any form of non-oxidizing corrosion [7] .…”

mentioning

confidence: 99%

Formation Quality Optimization and Corrosion Performance of Inconel 625 Weld Overlay Using Hot Wire Pulsed TIG

Zheng

Shaohu

et al. 2016

Rare Metal Materials and Engineering

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Based on the central composite rotatable design (CCD), clad beads of Inconel 625 were deposited on the surface of AISI 4130 plates using hot wire pulsed TIG (tungsten inert gas arc welding) technique. The response surface methodology (RSM) was used to establish models between process parameters and geometrical characteristics of the clad beads. Then, multiple-track two-layer weld overlay was deposited using the optimized process parameters. The microstructure of the weld overlay is primarily composed of columnar dendrites, and there are also a few planar crystals and cellular dendrites near the fusion zone. Meanwhile, equiaxed grains and steering dendrites are mainly distributed in the upper portion of the weld overlay. Potentiodynamic polarization tests were used to evaluate the corrosion resistance of the weld overlay and the substrate. The results show that adding clad layers can enhance the corrosion resistance, which degrades with the increase in Fe dilution. Moreover, the corrosion resistance of the second layer surface is close to that of wrought Inconel 625.

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Microstructure and Mechanical Properties of Thick‐Walled Inconel 625 Alloy Manufactured by Wire Arc Additive Manufacture with Different Torch Paths

Jiang

Zhang

et al. 2020

Adv Eng Mater

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Wire arc additive manufacture (WAAM) technology has attracted more and more attention. WAAM technology provides a way to manufacture a large‐scale part at a low cost and with less material loss. Inconel 625 alloys are widely used for their excellent mechanical properties and corrosion resistance. Therefore, it is important to investigate the performance of Inconel 625 alloy in WAAM. Herein, cold metal transfer (CMT) arc is used as the heat source to fabricate thick‐walled parts of Inconel 625 alloy by WAAM, and study the difference between microstructure and mechanical properties under the different torch trajectories. The result shows that the grains inside the parts are all thick dendrites and show the trend of epitaxial growth. The thermal input of the oscillation additive is higher than the two‐pass multilayer additives, and the Laves phase also precipitated more. The maximum tensile strength occurs in parallel sampling close to the substrate, which is 693.5 ± 12.6 and 751.2 ± 17.6 MPa in oscillation and two‐pass multilayer modes, respectively. The maximum elongation is obtained in the vertical direction is 60 ± 1.0% and 60 ± 1.1%. The anisotropies are 4% and 4.5%, respectively. The maximum hardness value under the two torch trajectories also appears close to the substrate.

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Effect of deposition strategy on the microstructure and mechanical properties of Inconel 625 superalloy fabricated by pulsed plasma arc deposition

Cited by 111 publications

References 24 publications

Microstructural Evolution of Inconel 625 and Inconel 686CPT Weld Metal for Clad Carbon Steel Linepipe Joints: A Comparator Study

Microstructural Evolution of Inconel 625 and Inconel 686CPT Weld Metal for Clad Carbon Steel Linepipe Joints: A Comparator Study

Formation Quality Optimization and Corrosion Performance of Inconel 625 Weld Overlay Using Hot Wire Pulsed TIG

Microstructure and Mechanical Properties of Thick‐Walled Inconel 625 Alloy Manufactured by Wire Arc Additive Manufacture with Different Torch Paths

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