Hard turning, grinding, and honing are common finishing processes in today’s production. The machined subsurface undergoes severe deformation and possible microstructure changes in a small scale subsurface layer Mechanical behavior of this shallow layer is critical for component performance such as fatigue and wear. Due to the small size of this region, mechanical behavior of this shallow layer is hard to measure using traditional material testing. With the nanoindentation method, mechanical behavior (nanohardness and modulus) at the microscale in subsurface was measured for AISI 52100 and AISI 1070 steel components machined by hard turning, grinding, and honing. The test results show that white layer increases nanohardness but decreases modulus of a turned surface. Nanohardness and modulus of the ground surface are slightly smaller than the honed one in the subsurface. However, grinding produces higher nanohardness and modulus in near-surface than honing, while honing produces more uniform hardness and modulus in the near-surface and subsurface, and would improve component performance. Nanohardness and modulus of the machined near-surface are strongly influenced by strain hardening, residual stress, size-effect, and microstructure changes.
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Microscale Mechanical Behavior of the Subsurface by Finishing Processes
Y. B. Guo,
Y. B. Guo
Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35487
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A. W. Warren
A. W. Warren
Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35487
Search for other works by this author on:
Y. B. Guo
Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35487
A. W. Warren
Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35487
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received December 31, 2003; revised June 21, 2004. Associate Editor: T. R. Kurfess.
J. Manuf. Sci. Eng. May 2005, 127(2): 333-338 (6 pages)
Published Online: April 25, 2005
Article history
Received:
December 31, 2003
Revised:
June 21, 2004
Online:
April 25, 2005
Citation
Guo , Y. B., and Warren, A. W. (April 25, 2005). "Microscale Mechanical Behavior of the Subsurface by Finishing Processes ." ASME. J. Manuf. Sci. Eng. May 2005; 127(2): 333–338. https://doi.org/10.1115/1.1807853
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