Direct observations of dislocation substructures formed by nano-indentation of the α-phase in an α/β titanium alloy

Nano-indentation has been used to assess the hardness of equiaxed grains of α-Ti as a function of orientation. Surface normals of these grains in metallographic sections were assessed using orientation imaging microscopy. Thin membranes of material from below a series of nano-indentations were excis...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2005-07, Vol.400, p.463-466
Main Authors: Viswanathan, G.B., Lee, Eunha, Maher, Dennis M., Banerjee, Srikumar, Fraser, Hamish L.
Format: Article
Language:English
Subjects:
Dislocation substructure
Focused ion beam
Nano-indentation
Orientation imaging
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Summary:Nano-indentation has been used to assess the hardness of equiaxed grains of α-Ti as a function of orientation. Surface normals of these grains in metallographic sections were assessed using orientation imaging microscopy. Thin membranes of material from below a series of nano-indentations were excised by use of a dual-beam focused ion beam instrument. In this way, the dislocation substructures beneath individual indentations were characterized using transmission electron microscopy, permitting an identification of both statistically stored and geometrically necessary dislocations.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2005.02.070