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TECHNICAL PAPERS

Waterjet Machining and Peening of Metals

[+] Author and Article Information
M. Ramulu, S. Kunaporn

Department of Mechanical Engineering, University of Washington, Box 352600, Seattle, WA 98195

D. Arola

University of Maryland, Baltimore County, MD

M. Hashish, J. Hopkins

Flow International, Kent, WA 98032

J. Pressure Vessel Technol 122(1), 90-95 (Aug 31, 1999) (6 pages) doi:10.1115/1.556155 History: Received June 25, 1999; Revised August 31, 1999
Copyright © 2000 by ASME
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References

Hamatani,  G., and Ramulu,  M., 1990, “Machinability of High Temperature Composites by Abrasive Waterjet,” ASME J. Eng. Mat. Technol., 112, pp. 381–386.
Ramulu,  M., and Arola,  D., 1993, “Waterjet and Abrasive Waterjet Cutting of Unidirectional Graphite/Epoxy Composite,” Composites, 24, No. 4, pp. 299–308.
Hashish,  M., 1984, “A Modeling Study of Metal Cutting with Abrasive Waterjets,” ASME J. Eng. Mater. Technol., 106, pp. 88–100.
Hashish,  M., 1989, “Machining of Advanced Composites with Abrasive Waterjets,” Manufac. Rev., 2, No. 2, pp. 142–150.
Hashish,  M., 1991, “Characteristics of Surfaces Machined with Abrasive Waterjets,” ASME J. Eng. Mater. Technol., 113, pp. 354–362.
Finnie, I., 1958, “The Mechanism of Erosion of Ductile Metals,” Proceedings, Third National Congress of Applied Mechanics, ASME, New York, pp. 527–532.
Bitter,  J. G. A., 1963, “A Study of Erosion Phenomenon: Part I,” Wear, 6, pp. 5–21.
Bitter,  J. G. A., 1963, “A Study of Erosion Phenomenon: Part II,” Wear, 6, pp. 169–190.
Arola, D., and Ramulu, M., 1993, “Mechanism of Material Removal in Abrasive Waterjet Machining in two Commonly used Aerospace Material,” Proceedings, 7th American Water Jet Conference, WJTA, St. Louis, MO, 1 , pp. 43–64.
Arola, D., and Ramulu, M., 1993, “Micro-Mechanisms of Material Removal in Abrasive Waterjet Machining,” Processing of Advanced Materials, 4 , pp. 37–47.
Arola, D., and Ramulu, M., 1995, “Abrasive Waterjet Machining of Titanium Alloy,” Proceedings, 8th American Waterjet Conference, WJTA, St. Louis, MO, 1 , pp. 389–408.
Arola, D., and Ramulu, M., 1996, “A Residual Stress Analysis of Metals Machined with the Abrasive Waterjet,” Proceedings, Symposium on Jetting Technology, BHRA Group, UK, pp. 269–290.
Arola,  D., and Ramulu,  M., 1997, “Material Removal in Abrasive Waterjet Machining of Metals, Surface Integrity and Texture,” Wear, 210, No. 2, pp. 50–58.
Arola,  D., and Ramulu,  M., 1997, “Material Removal in Abrasive Waterjet Machining of Metals, A Residual Stress Analysis,” Wear, 211, No. 2, pp. 302–310.
Burnham, C. D., and Kim, T. J., 1989, “Statistical Characterization of Surface Finish Produced by a High Pressure Abrasive Waterjet,” Proceedings, 5th American Waterjet Conference, WJTA, pp. 165–175.
Ross, R. B., 1980, Metallic Materials Specification Handbook, 3rd Edition, Chapman and Hall Publ. Ltd., UK.
Metals Handbook, 1972, 8th Edition, Atlas of Microstructures of Industrial Alloys, Vol. 7, ASM, Columbus, OH.
Kruszynski,  B. W., and Van Luttervelt,  K. A., 1989, “The Influence of Manufacturing Processes on Surface Properties,” Adv. Manufact. Eng., 1, pp. 30–38.
Noyan, I. C., and Conen, J. B., 1987, Residual Stress: Measurement by Diffraction and Interpretation, Springer, Germany.
Was, G. S., Pelloux, R. M., and Frabolot, M. C., 1981, “Effect of Shot Peening Methods on The Fatigue Behavior of Alloy 7075-T6,” Proceedings, First International Conference on Shot Peening, Pagamon Press Ltd., pp. 445–451.

Figures

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Waterjet peening experimental setup
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Graphic representation of the eroded surface specimens of (a) ML-1, (b) ML-2, (c) ML-3, (d) ML-4, (e) ML-5, (f ) ML-6, and (g) ML-7
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Residual stresses versus standoff distance
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Microhardness distribution of specimens
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Surface profile and average roughness resulting from WJ peening of nozzle B
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Micrographs of water-peened surfaces using nozzle B under different standoff distances with high pressure: (a) SOD=36 mm, (b) SOD=53 mm, (c) SOD=76 mm, (d) SOD=102 mm, and (e) unpeened surface
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Microscopic feature of three regions on the AWJ-machined surface of 7075-T6
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Typical surface profiles of the AWJ-machined metals
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Average roughness resulting from AWJ machining: (a) AWJ A, (b) AWJ B, and (c) AWJ C
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Depth of subsurface deformation from Vickers hardness measurements, cutting conditions AWJ A: (a) IDR and (b) SCR

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