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TECHNICAL PAPERS

Non-Destructive Machinability Characterization of Materials Through a Correlation With Rate of Strain Sensitivity

[+] Author and Article Information
Jeffrey A. Sprague

Smith and Nephew, Inc., 1450 Brooks Road, Memphis, TN 38116e-mail: jeff.sprague@smith-nephew.com

Evangelos C. Eleftheriou, Charles E. Bates

Department of Materials and Mechanical Engineering, University of Alabama at Birmingham, 254-BEC, 1150 Tenth Avenue South, Birmingham, AL 35294-4461

J. Manuf. Sci. Eng 122(4), 691-697 (Sep 01, 1999) (7 pages) doi:10.1115/1.1285902 History: Received January 01, 1999; Revised September 01, 1999
Copyright © 2000 by ASME
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References

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Hastings,  W. F., Oxley,  P. L. B., and Stevenson,  M. G., 1974, “Predicting a Material’s Machining Characteristics Using Flow Stress Properties Obtained From High-Speed Compression Tests,” Proc. Inst. Mech. Eng. 188, pp. 245–252.
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Wu,  J.-S., Dillon,  O. W., and Lu,  W.-Y., 1996, “Thermo-Viscoplastic Modeling of Machining Process Using A Mixed Finite Element Method,” Trans. ASME, 118, pp. 470–482.
Bridgeman, P., 1952, Studies in Large Plastic Flow and Fracture, McGraw-Hill, New York.
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Schey, J. A., 1987, Introduction to Manufacturing Processes, McGraw-Hill, New York.
Black, J. T., Mehta, A., and Huang, J. M., 1996, “Machinability Tests of Modified Brass Alloys,” American Foundrymen’s Society Research, Auburn.
Sprague, J. A., 1998, “Correlation of Machinability With Rate of Strain Dependence,” Master’s thesis, University of Alabama at Birmingham.

Figures

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Experimental setup including tower, electromagnet, drop weights, dynamometer, mounting plates, and test sample
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Sample force signal obtained with dynamometer
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Schematic diagram of worn flank face
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Four repetitions of tool wear curve from drilling experiment on material G2 at 0.63 (m/s) cutting speed
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Taylor curve from drilling experiment on material G2
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Normalized stress versus rate of strain curve
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Average number of holes to squeal versus normalized contact viscosity
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Rate of loading versus rate of strain
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Illustration of machinability and contact viscosity curves for gray irons
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Illustration of machinability and contact viscosity curves for ductile irons

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