Subsurface Microstructure Induced by Sliding Wear in a Copper Single Crystal

Abstract:

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A sliding wear test was conducted in a copper single crystal having (001) surface. Microstructures induced by the sliding wear were investigated by means of the electron channelling contrast (ECC) imaging and electron backscattered diffraction (EBSD) analysis. The microstructures below the worn surface consisted of the stack of dislocation cell structure, layered structure and equiaxed fine-grained structure. At the dislocation cell structure, there was no significant change in crystallographic orientation. On the other hand, the crystal at the layered structure rotated continuously around the axis which was perpendicular to sliding wear direction. In the fine-grained structure, preferential orientations no longer existed. The authors attempted to explain grain boundary formation in terms of a rotation angle gradient which is proportional to density of geometrically-necessary dislocations.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

2407-2410

DOI:

10.4028/www.scientific.net/MSF.561-565.2407

Citation:

Y. Ohno et al., "Subsurface Microstructure Induced by Sliding Wear in a Copper Single Crystal", Materials Science Forum, Vols. 561-565, pp. 2407-2410, 2007

Online since:

October 2007

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Price:

$35.00

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