Influence of Abrasive Properties on Erosion in Waterjet Machining

Abrasive water jet machining is a proficient alternative for cutting difficult-to-machine materials with complex geometries, such as austenitic stainless steel 304L (AISI304L). However, due to differences in machining responses for varied material conditions, the abrasive waterjet machining experiences challenges including kerf geometric inaccuracy and low material removal rate. In this study, an abrasive waterjet machining is employed to perform contour cutting of different profiles to investigate the impacts of traverse speed and material thickness in achieving lower kerf taper angle and higher material removal rate. Based on experimental investigation, a trend of decreasing the level of traverse speed and material thickness that results in minimum kerf taper angle values of 0.825° for machining curvature profile and 0.916° for line profiles has been observed. In addition, higher traverse speed and material thickness achieved higher material removal rate in cutting different curvature radii and lengths in line profiles with obtained values of 769.50 mm3/min and 751.5 mm3/min, accordingly. The analysis of variance revealed that material thickness had a significant impact on kerf taper angle and material removal rate, contributing within the range of 69–91% and 62–69%, respectively. In contrast, traverse speed was the least factor measuring within the range of 5–18% for kerf taper angle and 27–36% for material removal rate.

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Abrasive Waterjet Cutting of Aluminum Alloys: Workpiece Surface Roughness

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.404.3 ◽

2013 ◽

Vol 404 ◽

pp. 3-9 ◽

Cited By ~ 5

Author(s):

Nihat Tosun ◽

Ihsan Dagtekin ◽

Latif Ozler ◽

Ahmet Deniz

Keyword(s):

Mechanical Properties ◽

Surface Roughness ◽

Aluminum Alloys ◽

Abrasive Waterjet ◽

Traditional Methods ◽

Workpiece Surface ◽

Abrasive Waterjet Machining ◽

Waterjet Machining ◽

Area Of Application ◽

Better Than

Abrasive waterjet machining is one of the non-traditional methods of the recent years which found itself a wide area of application in the industry for machining of different materials. In this paper, the surface roughness of 6061-T6 and 7075-T6 aluminum alloys are being cut with abrasive waterjet is examined experimentally. The experiments were conducted with different waterjet pressures and traverse speeds. It has been found that the surface roughness obtained by cutting material with high mechanical properties is better than that of obtained by cutting material with inferior mechanical properties.

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Use of the Scanning Electron Microscope in a Study of the Abrasive Properties of Textile Yarns

Textile Research Journal ◽

10.1177/004051757004000903 ◽

1970 ◽

Vol 40 (9) ◽

pp. 780-784 ◽

Cited By ~ 5

Author(s):

G.S. Egerton ◽

K.M. Fisher

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Abrasive Properties ◽

Scanning Electron

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Effect of abrasive waterjet machining on LaPO4/Y2O3 ceramic matrix composite

Journal of the Australian Ceramic Society ◽

10.1007/s41779-017-0142-7 ◽

2017 ◽

Vol 54 (2) ◽

pp. 205-214 ◽

Cited By ~ 4

Author(s):

K. Balamurugan ◽

M. Uthayakumar ◽

S. Sankar ◽

U. S. Hareesh ◽

K. G. K. Warrier

Keyword(s):

Matrix Composite ◽

Ceramic Matrix Composite ◽

Ceramic Matrix ◽

Abrasive Waterjet ◽

Abrasive Waterjet Machining ◽

Waterjet Machining

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A study on surface roughness in abrasive waterjet machining process using artificial neural networks and regression analysis method

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2007.10.024 ◽

2008 ◽

Vol 202 (1-3) ◽

pp. 574-582 ◽

Cited By ~ 137

Author(s):

Ulaş Çaydaş ◽

Ahmet Hasçalık

Keyword(s):

Neural Networks ◽

Surface Roughness ◽

Regression Analysis ◽

Artificial Neural Networks ◽

Machining Process ◽

Abrasive Waterjet ◽

Analysis Method ◽

Abrasive Waterjet Machining ◽

Waterjet Machining ◽

Artificial Neural

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Hybrid CO2 Laser/Waterjet Machining of Polycrystalline Diamond Substrate: Material Separation Through Transformation Induced Controlled Fracture

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4027304 ◽

2014 ◽

Vol 136 (4) ◽

Cited By ~ 7

Author(s):

Dinesh Kalyanasundaram ◽

Andrea Schmidt ◽

Pal Molian ◽

Pranav Shrotriya

Keyword(s):

Co2 Laser ◽

Polycrystalline Diamond ◽

Substrate Material ◽

Stress Fields ◽

Separation Mechanism ◽

Raman Spectrometry ◽

Waterjet Machining ◽

Machining System ◽

Material Separation ◽

Controlled Fracture

This paper presents a combined experimental and computational investigation of a novel material separation mechanism in polycrystalline diamond (PCD) substrates. A hybrid CO2 laser/waterjet (CO2-LWJ) machining system that combines a CO2 laser for localized heating and an abrasive-free waterjet to rapidly quench the heated area is utilized for cutting experiments on PCD substrates. Scanning electron microscopy (SEM) and micro-Raman spectrometry characterization performed on the cut surfaces show that cut surfaces were divided into two zones—a thin transformed zone near the top where the PCD grains have transformed to graphite and diamond-like carbon; and a fracture zone with the same composition as-received substrate. The experimental results indicate that the PCD substrates were cut through a “score and snap” mechanism—laser heating leads to localized damage and phase transformation of surface layers; and subsequently, stress fields developed due to constrained expansion of transformed material and waterjet quenching act on the laser made “score” to propagate crack through the thickness. Analytical solutions for thermal diffusion and force equilibrium are used to determine the temperature and stress fields in the PCD substrate during CO2-LWJ cutting. Fracture mechanics analysis of crack propagation is performed to demonstrate the feasibility of the “score and snap” mechanism for cutting of PCD substrates.

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