
Proceedings Paper
Evaluation of orientation-dependent geometry of micro triangular indentation on grain of polycrystalline α-titaniumFormat | Member Price | Non-Member Price |
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Paper Abstract
In microindentation testing, an indentation size is smaller than the average grain size of industrial polycrystalline metals,
so that the indentation shape is affected by the crystallographic orientation of grain on which the indentation is imposed.
Hence, clarification of the relation between the crystal orientation and the indentation shape leads to the possibility of
estimating the crystal orientation by microindentation testing. In the present study, influences of crystal orientations
upon indentation shapes on grains of polycrystalline titanium were investigated. The crystal orientations of grains were
measured by an electron backscattered diffraction method, and indentation tests with a triangular pyramidal indenter
were performed on the grains. The indentation shapes were thus observed by a laser-scanning microscope and an optical
microscope. The results revealed that the direction of the most bulged position of edges from the apex of triangular
indentation agreed well with an a-axis direction. It was also found that deviation of the indentation edge from the ideal
one became smaller with larger angle of inclination of c-axis for the sample surface, owing to the limited slip direction of
titanium. Those results suggest the possibility to evaluate the crystal orientation of titanium grain directly from the
observed indentation geometry.
Paper Details
Date Published: 14 April 2010
PDF: 7 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75221Q (14 April 2010); doi: 10.1117/12.851502
Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)
PDF: 7 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75221Q (14 April 2010); doi: 10.1117/12.851502
Show Author Affiliations
T. Ishida, Okayama Univ. (Japan)
Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)
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