Optimization of Process Parameters in Abrasive Water Jet Machining/Cutting (AWJM) of Nickel Alloy using Traditional Analysis to Minimize Kerf Taper Angle

Jeykrishnan, J.; Ramnath, B. Vijaya; Vignesh, S.; Sridharan, P.; Saravanan, B.

doi:10.1016/j.matpr.2019.05.106

Cited by 22 publications

(7 citation statements)

References 12 publications

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“…The experimental data presented in Figure 5 demonstrates that the narrowing of top and bottom kerf widths depends directly on the decreasing amount of abrasive particles during the machining process. A similar explanation was study by Jeykrishnan et al [33], where a larger kerf top width than bottom width formed by AWJM in an Inconel 625 alloy. In this study, a lower rate of traverse speed at 90 mm/min amounted to lower variation in kerf widths as compared to a higher rate of 120-150mm/min.…”

Section: Kerf Top Width and Bottom Resultssupporting

confidence: 81%

Impacts of traverse speed and material thickness in abrasive waterjet contour cutting of Austenitic stainless steel AISI 304L

Llanto

Tolouei‐Rad

Vafadar

et al. 2021

Preprint

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Austenitic stainless steel 304L (AISI304L), of varied thickness, is widely used in the fabrication industry and in many cases, it requires contour machining for achieving intricate profiles. Abrasive water jet machine is a proficient alternative for machining difficult-to-cut, reflective, conductive, and heat-sensitive materials such as austenitic stainless steel with complex geometries. However, due to differences in machining responses for varied material conditions, the abrasive waterjet machine experiences challenges such as kerf geometric inaccuracy and low material removal rate. In this study, an abrasive waterjet machine is employed to perform contour cutting of different profiles to investigate the impacts of traverse speed and material thickness in achieving a lower kerf taper angle and higher material removal rate. Experimental results show that all profiles encountered a similar trend of obtaining higher kerf taper angle and material removal rate as traverse speed increased. Analysis of variance revealed that material thickness denotes a more significant impact to kerf taper angle and material removal rate with a contribution within the range of 69%-91% and 62-69% respectively; whereas traverse speed indicates the least contributing factor within the range of 5%-18% in kerf taper angle and 27%-36% for material removal rate.

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Section: Kerf Top Width and Bottom Resultssupporting

confidence: 81%

Impacts of traverse speed and material thickness in abrasive waterjet contour cutting of Austenitic stainless steel AISI 304L

Llanto

Tolouei‐Rad

Vafadar

et al. 2021

Preprint

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show abstract

“…The MRR and DOC increased with the increase in processing pressure. Jeykrishnan et al (2019) aimed to reduce the kerf angle by optimizing water pressure, stand-off distance and feed rate in AWJ machining of Inconel-625 super alloy. The results showed that the output characteristics of the water pressure played an important role in influencing the abrasive feed rate and the stand-off distance.…”

Section: Introductionmentioning

confidence: 99%

Investigation of effect of abrasive water jet (AWJ) machining parameters on aramid fiber-reinforced polymer (AFRP) composite materials

Akincioğlu

2021

AEAT

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Purpose The purpose of this study was to optimize the surface roughness (Ra), delamination damage at the hole entrance (FdT) and at the hole exit (FdB) and kerf angle (K) in the drilling of aramid fiber-reinforced polymer (AFRP) composite material using abrasive water jet (AWJ) machining. Design/methodology/approach The AFRP composite was produced by the vacuum infusion method. The drilling experiments were performed on an AWJ machine using a three-axis computerized numerical control system. Machine processing parameters were determined as water pressure (2,000, 3,000 and 4,000 bar), stand-off distance (2, 4 and 6 mm) and traverse feed rate (150, 250 and 350 mm/min). Optimization of processing parameters in the drilling experiments was carried out according to the Taguchi L27 (33) orthogonal array. In addition, gray relational analysis (GRA) was used to analyze the complex uncertainty affecting the results. Findings Results of the drilling operations demonstrated that water pressure (P) was the most effective parameter, with 65.3%, 65.2%, 49.8% and 52.1% contribution rates for Ra, FdT, FdB and K, respectively. Practical implications Reliable results have been obtained with Taguchi-based GRA while drilling AFRP composite material using AWJ. Significant results have been achieved to increase the hole quality in the drilling of AFRP composite material. Originality/value The new approach is to present more detailed analysis by using Taguchi method and multi-decision Taguchi-based gray relation analysis in AFRP composite material drilling using AWJ. Thus, time and experiment costs are saved.

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“…The input parameters considered in abrasive waterjet contour cutting in this experiment included traverse rate (V f ), abrasive flow rate (m a ) and water pressure (P), as these parameters have been demonstrated in previous studies as having significant impacts in AWJM applications [10,12,23,24]. Surface integrity, kerf geometries and low material removal rate evidence has been reported in machining of AISI 304L, requiring further improvement [4,25].…”

Section: Materials and Experimental Designmentioning

confidence: 99%

“…Additionally, they established standoff distances, as the least contributing parameter. Research focused on optimisation of cutting operations is being continuously undertaken by researchers, where varied methods have been employed to solve different single and multi-objective optimisation problems [11][12][13][14]. Whereas single-objective optimisation problems have conventionally been applied, the performance of AWJM has mainly been measured based on multiple responses.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective Optimisation in Abrasive Waterjet Contour Cutting of AISI 304L

Llanto¹,

Vafadar²,

Tolouei‐Rad³

2022

Production Engineering and Robust Control

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The optimum waterjet machining parameters were found for maximising material removal rate and minimising surface roughness and kerf taper angle where three levels of traverse speed, abrasive flow rate, and waterjet pressure are used. The multi-linear regression equations were obtained to investigate the relationships between variables and responses, and the statistical significance of contour cutting parameters was analysed using the analysis of variance (ANOVA). Further, the response surface methodology (desirability function approach) was utilised for multi-objective optimisation. The optimum traverse speeds were 95 mm/min for 4 mm thickness and 90 mm/min for both 8 and 12 mm thicknesses. For all material thicknesses, the abrasive mass flow rate and waterjet pressure were 500 g/min and 200 MPa, respectively. The minimum values of surface roughness, kerf taper angle, and maximum material removal rate for 4-, 8- and 12-mm material thicknesses were respectively 0.799º, 1.283 μm and 297.98 mm3/min; 1.068º, 1.694 μm and 514.97 mm3/min; and 1.448º, 1.975 μm and 667.07 mm3/min. In this study, surface roughness and kerf taper angle decreased as the waterjet pressure and abrasive mass flow rate increased; and this is showing a direct proportional relationship with traverse speed, abrasive mass flow rate and waterjet pressure.

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Optimization of Process Parameters in Abrasive Water Jet Machining/Cutting (AWJM) of Nickel Alloy using Traditional Analysis to Minimize Kerf Taper Angle

Cited by 22 publications

References 12 publications

Impacts of traverse speed and material thickness in abrasive waterjet contour cutting of Austenitic stainless steel AISI 304L

Impacts of traverse speed and material thickness in abrasive waterjet contour cutting of Austenitic stainless steel AISI 304L

Investigation of effect of abrasive water jet (AWJ) machining parameters on aramid fiber-reinforced polymer (AFRP) composite materials

Multi-objective Optimisation in Abrasive Waterjet Contour Cutting of AISI 304L

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