Experimental analysis and characterization of abrasive water jet machining of Inconel 718

Bhandarkar, Vivek; Singh, Virendra; Gupta, T.V.K.

doi:10.1016/j.matpr.2019.04.227

Cited by 12 publications

(11 citation statements)

References 7 publications

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“…4 that when increasing the pressure, the pocket depth also increases. The same effect was reported in [20]. In [21] was showed that depth of cut is strongly influenced by the pressure.…”

Section: Depth Of Cut Depth Of Cutsupporting

confidence: 77%

“…These previous studies of AWJ milling of IN718 revealed that lower pressures and higher speeds improve surface roughness [20,22,23] whilst depth of cut increase at higher pressures and lower traverse speed [20][21][22]. Further, in all AWJ machined surfaces was reported the presence of embedded abrasive particles [14,[22][23][24][25][26][27].…”

Section: Intr Introduction Oductionmentioning

confidence: 70%

“…This is due to the exposure time of the waterjet with the target material, at higher traverse speeds less time is needed for milling leading to lower pocket depth. In [11,20,22] were also reported to occur the same trend in IN718 and stainless steel.…”

Section: Depth Of Cut Depth Of Cutmentioning

confidence: 79%

“…The literature available on the influence of AWJ parameters in the machined surface of IN718 is limited. Bhandarkar et al [20] focuses on characterizing pockets milled by AWJ in order to optimize process parameters for pocket dimensions and surface roughness. They found that the surface roughness decreases at lower pressure and at higher traverse speed, whereas for pocket depth, higher pressure with lower traverse speed is preferred.…”

Section: Intr Introduction Oductionmentioning

confidence: 99%

See 3 more Smart Citations

Multi-scale characterization of material and surface integrity of Inconel 718 when milling by Abrasive Water Jet process: Context of repair application

Salinas¹,

Moussaoui²,

Hejjaji³

et al. 2021

Esaform 2021

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Inconel 718 (IN718) is a precipitation hardened nickel-base super-alloy exhibiting poor machinability and used in the hot section of aircraft engines. These components are subjected to severe thermo-mechanical loads in a highly corrosive environment, limiting their service life due to cracks and wear. Due to their high added-value, repair of damaged IN718 components is an interesting alternative instead their replacement. Repair process involves material removal of the damaged zone and subsequent cavity refill. Nevertheless, material removal of IN718 by conventional methods is a challenging task. Abrasive Water Jet (AWJ), a non-conventional machining process, offers a potential alternative to mitigate IN718 machining problems. However, research on the impact of AWJ process parameters during IN718 milling on the surface and material integrity is limited in the literature. Furthermore, in repair context, no study proposes AWJ machining as material removal process. The present work focuses on a multi-scale characterization of the influence of AWJ process parameters (pressure, traverse speed, step-over distance and abrasive size) on surface roughness, depth of cut, abrasive embedment and residual stress, during milling of untreated IN718. Surface integrity characterization on the milled surfaces was conducted through 3D optical microscopy, profilometry and SEM techniques. Residual stress measurements were performed in longitudinal and transverse directions with respect to the machining path using XRD technique. The results showed that all milled surfaces presented abrasive embedment and a compressive residual stress state with similar values in both directions. Up to 15% of the area of a milled surface consisted of abrasive embedment. The tool path has not influenced the residual stresses. Furthermore, surface roughness is dependent on pressure and traverse speed; depth of cut is influenced by pressure, traverse speed and grit size; abrasive embedment depends on pressure, step-over distance and grit size; whilst, residual stresses are influenced by traverse speed and grit size.

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“…4 that when increasing the pressure, the pocket depth also increases. The same effect was reported in [20]. In [21] was showed that depth of cut is strongly influenced by the pressure.…”

Section: Depth Of Cut Depth Of Cutsupporting

confidence: 77%

Section: Intr Introduction Oductionmentioning

confidence: 70%

Section: Depth Of Cut Depth Of Cutmentioning

confidence: 79%

Section: Intr Introduction Oductionmentioning

confidence: 99%

See 2 more Smart Citations

Multi-scale characterization of material and surface integrity of Inconel 718 when milling by Abrasive Water Jet process: Context of repair application

Salinas¹,

Moussaoui²,

Hejjaji³

et al. 2021

Esaform 2021

View full text Add to dashboard Cite

show abstract

“…The high-pressure jet cuts the material easily and depth of the cut is also increased. The cost of production is reduced because the consumption of abrasive particles is low with regard to high jet pressure [14]. In this experiment, a detailed study conducted on various input parameters, such as jet pressure, traverse speed and standoff distance, and the output parameters, such as kerf width, material removal rates and surfaces roughness, are analysed based on these input parameters.…”

Section: Introductionmentioning

confidence: 99%

Abrasive water jet machining of fly ash and metakaolin based geo-polymers

et al. 2020

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In the present study, the abrasive water jet machining (AWJM) of geopolymers prepared from fly ash, metakaolin and sand is discussed. The samples were prepared from sodium promoter, fly ash / metakaolin and sand. The process of activation was made using a 10M sodium hydroxide solution combined with a sodium silicate solution (the ratio of liquid glass - 1:2.5). To produce geopolymers, flakes of technical sodium hydroxide were used and an aqueous solution of sodium silicate (R-145) with a molar module of 2.5 and a density of around 1.45 g/cm3 the tap water. The alkaline solution was prepared by means of pouring the aqueous solution of sodium silicate over the solid sodium hydroxide. The solution was mixed and left until its temperature stablised and the concentrations equalised, which took around 2 hours. The fly ash, sand and alkaline solution were mixed for around 10 minutes using a low-speed mixing machine (in order to obtain a homogeneous paste). The paste was allowed to dry in the shade. The paper investigates the AWJM studies on the prepared geopolymer specimens with varyied input parameters such as standoff distance (1.2 and 3 mm), water pressure (120, 140 and 160 MPa) and feed rate (5, 10 and 15 mm/min). The output parameters such as kerf angle and material removal rate (MRR) were studied with the varying combination of input parameters. From the results, the optimal parameters for machining the geopolymer composites were interpreted.

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Influence of abrasive water jet parameters on the surface integrity of Inconel 718

Salinas

Moussaoui

Hejjaji

et al. 2021

Int J Adv Manuf Technol

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Inconel 718 (IN718) is a precipitation hardened nickel-base super-alloy exhibiting high strength and good corrosion resistance at elevated temperatures and on the downside it is characterized by poor machinability. Abrasive Water Jet (AWJ) process, offers a potential method to machining difficult-to-cut materials such as IN718. The present work investigates the influence of Abrasive Water Jet parameters on surface roughness, topography, depth of cut and residual stress when milling IN718. Surface characterization was conducted through 3D optical microscopy and SEM techniques. Residual stresses were measured in longitudinal and transverse directions with respect to the machining path using X-ray diffraction (XRD) technique. The obtained results showed that milled surfaces have a homogeneous texture with embedded abrasive particles and high surface roughness. AWJ process introduced high compressive residual stresses with similar order of level in both directions ( and ). In addition, it was observed that jet pressure is the most influencing parameter on roughness and depth of cut, whilst traverse speed and step-over distance had a significant effect on the residual stress. Based on the experimental analysis, an empirical model to predict the depth of cut was proposed. The validation of the proposed model, has shown around 5% error in the predicted and actual pocket depth.

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Experimental analysis and characterization of abrasive water jet machining of Inconel 718

Cited by 12 publications

References 7 publications

Multi-scale characterization of material and surface integrity of Inconel 718 when milling by Abrasive Water Jet process: Context of repair application

Multi-scale characterization of material and surface integrity of Inconel 718 when milling by Abrasive Water Jet process: Context of repair application

Abrasive water jet machining of fly ash and metakaolin based geo-polymers

Influence of abrasive water jet parameters on the surface integrity of Inconel 718

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