World Academy of Science, Engineering and Technology
Published October 25, 2011 | Version 12154
Journal article Open

Analysis of Residual Strain and Stress Distributions in High Speed Milled Specimens using an Indentation Method

Description

Through a proper analysis of residual strain and stress distributions obtained at the surface of high speed milled specimens of AA 6082–T6 aluminium alloy, the performance of an improved indentation method is evaluated. This method integrates a special device of indentation to a universal measuring machine. The mentioned device allows introducing elongated indents allowing to diminish the absolute error of measurement. It must be noted that the present method offers the great advantage of avoiding both the specific equipment and highly qualified personnel, and their inherent high costs. In this work, the cutting tool geometry and high speed parameters are selected to introduce reduced plastic damage. Through the variation of the depth of cut, the stability of the shapes adopted by the residual strain and stress distributions is evaluated. The results show that the strain and stress distributions remain unchanged, compressive and small. Moreover, these distributions reveal a similar asymmetry when the gradients corresponding to conventional and climb cutting zones are compared.

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References

  • C. L. Dotson, R. Harlow, and R. L. Thompson, Fundamentals of Dimensional Metrology. New York: Thompson Delmar Learning, 2003.
  • M. A. Curtis, and F. T. Farago, Handbook of Dimensional Measurement. New York: Industrial Press Inc., 2007.
  • J. A. Bosch (Ed.), Coordinate Measuring Machines and Systems. New York: Marcel Deckker, Inc., 1995.
  • J. Lu (Ed.), Handbook of Measurement of Residual Stresses. Lilburn, Georgia: Fairmont Press Inc., 1996.
  • R. E. Rowlands, "Residual stresses," in Handbook on Experimental Mechanics, A. S. Kobayashi, Ed. New Jersey: Prentice-Hall, 1987, pp. 768-813.
  • P.J. Withers, and H. K. Bhadeshia, "Residual stress" Part 1 - Measurement techniques, Mater. Sci. Technol., vol. 17, pp. 355-365, 2001.
  • J.E. Wyatt, and J.T. Berry, "A new technique for the determination of superficial residual stresses associated with machining and other manufacturing processes," J. Mater. Proc. Tech., vol. 171, pp. 132-140, 2006.
  • H. Schulz, High Speed Machining. Munich: Carl Hanser, 1996.
  • E. M. Trent, Metal Cutting. London: Butterworth/Heinemann, 1991. [10] R. L. King (Ed.), Handbook of High Speed Machining Technology. New York: Chapman and Hall, 1985. [11] A. L. Mantle, D. K. Aspinwall, "Surface integrity of a high speed milled gamma titanium aluminide," J. Mater. Proc. Tech., vol. 118, pp. 143- 150, 2001. [12] P. J. Withers, "Residual stress and its role in failure," Rep. Prog. Phys., vol. 70, pp. 2211-2264, 2007. [13] S. P. Timoshenko, and J. N. Goodier, Theory of Elasticity, 3rd edn, New York: McGraw-Hill, 1970. [14] F. V. D├¡az, R. E. Bolmaro, A. P. M. Guidobono, and E. F. Girini, "Determination of residual stresses in high speed milled aluminium alloys using a method of indent pairs," Exp. Mech., vol. 50, pp. 205-215, 2010. [15] W. Mao, "Recrystallization and grain growth," in Handbook of Aluminum, vol. 1, Physical Metallurgy and Processes, G. E. Totten, and D. S. MacKenzie, Ed. New York: Marcel Dekker Inc., 2003, pp. 211- 258. [16] P. R. Bevington, and D. K. Robinson, Data reduction and error analysis for the physical sciences, New York: McGraw-Hill, 2002. [17] A. M. Korsunsky, G. M. Regino, D. P. Latham, H. Y. Li, and M. J. Walsh, "Residual stresses in rolled and machined nickel alloy plates: synchrotron X-ray diffraction measurement and three-dimensional eigenstrain analysis," J. strain analysis, vol. 42, pp. 1-12, 2007. [18] D. W. Schwach, and Y. B. Guo, "A fundamental study on the impact of surface integrity by hard turning on rolling contact fatigue," Int. J. Fatigue, vol. 28, pp. 1838-1844, 2006.