“Gonio-Microscope” and Its Metallurgical Applications

Abstract

A new instrument, Gonio-Microscope, has been developed which permits measurement of the direction of the normal to a plane surface with an area as small as 10×10µ2. The accuracy of the measurement is within ±0.5 deg. for a small component plane of an etch pit. A special feature of this instrument is that the measurement is made simultaneously with the observation of the position and shape of the plane being measured. This was successfully applied to the determination of grain orientation, structure of twin bands and slip bands, and the shapes of tapered cross sections of razor blades.

Work Hardening of Copper Single Crystals with Multiple Glide Orientations

“…2) were chemically polished and then extended by a few percent at room temperature. The orientations of slip lines on the specimen surfaces, both top and side faces, and also the angle between the top and side surfaces were measured by a gonio-microscope (21), and the angle between the tensile axis and the active slip plane was determined. The amount of the easy glide shear strain was determined by the shear strain at the are assigned after the manner shown in the steleographic triangle in Fig.…”

Aggressive Ion Accessibility and the Morphology of Corrosion Pits

“…Taoka et al (17) report similar shapes for corrosion pits produced chemically on the surfaces of Fe-3% Si. The existence of {110} and {100} facets on similar pits produced by the same etch procedure in Ferrovac E iron has also been confirmed by Spink and Ives (18).…”

On the Use of Polycrystal and Individual Orientation Texture Analysis Methods for BCC Materials

“…The increase in the number of measurements narrows the confidence interval for the orientation angles determined and decreases the root-mean square error. Termer and Goldstein, 1987 Sokolov, 1969Taoka et al, 1965 Figure 8 Etch-pits patterns for different orientations of the sample's surface. Etch-pits are composed of 100 and 110 planes.…”