Various methods for the production of bulk nanostructured (NS)/ultrafine-grained (UFG) materials have been developed, including equal channel angular extrusion (ECAE), a form of severe plastic deformation. Using an ECAE NS/UFG copper bar as an example, this study has investigated machining-induced workpiece microstructure variation using X-ray diffraction. It has been found that (1) under gentle cutting conditions, there was a 10% increase in the median grain size compared with unmachined ECAE NS/UFG copper bars. Increases in the arithmetic-, area-, and volume-weighted grain sizes were found to be 10%, 8%, and 8%, respectively, and (2) an average 27% drop in the dislocation density was observed between the machined and unmachined ECAE copper bars. The dislocation density was shown to have the most reduction at the outer radius of the machined ECAE bar where more heat and/or higher pressure were experienced.
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April 2011
Research Papers
Study of Machining-Induced Microstructure Variations of Nanostructured/Ultrafine-Grained Copper Using XRD
Yong Huang,
Yong Huang
Department of Mechanical Engineering,
e-mail: yongh@clemson.edu
Clemson University
, Clemson, SC 29634-0921
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Mason Morehead
Mason Morehead
Department of Mechanical Engineering,
Clemson University
, Clemson, SC 29634-0921
Search for other works by this author on:
Yong Huang
Department of Mechanical Engineering,
Clemson University
, Clemson, SC 29634-0921e-mail: yongh@clemson.edu
Mason Morehead
Department of Mechanical Engineering,
Clemson University
, Clemson, SC 29634-0921J. Eng. Mater. Technol. Apr 2011, 133(2): 021007 (7 pages)
Published Online: March 4, 2011
Article history
Received:
December 31, 2009
Revised:
November 15, 2010
Online:
March 4, 2011
Published:
March 4, 2011
Citation
Huang, Y., and Morehead, M. (March 4, 2011). "Study of Machining-Induced Microstructure Variations of Nanostructured/Ultrafine-Grained Copper Using XRD." ASME. J. Eng. Mater. Technol. April 2011; 133(2): 021007. https://doi.org/10.1115/1.4003105
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