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Proceedings Paper

Electro-Optical Image Intensifier System To Study Lattice Rotation In Nonstop Uniaxial Tensile Tests On Aluminum Single Crystals
Author(s): Narayan R. Joshi
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Paper Abstract

A new X-ray system developed by Reifsnider and Green is used in this work for cine recording of Laue transmission X-ray diffraction patterns. This system incorporated a cascaded image intensifying tube and permits direct viewing and recording of Laue transmission X-ray diffraction patterns produced on a fluorescent screen, with exposure time as short as 1/220 sec. The tube used was RCA type C70021A, three stage, cascaded and magnetically focused. It was surrounded by a water cooled magnetic coil which supplies a uniform axial field of about 300G. The tube had 1:1 magnification and the diameter of both input and output screens was 3.8 cm. The fluorescent screen was positioned at a distance of 3 cm on the side of the specimen mounted on Instron testing machine opposite the X-ray source. A Super-Farron, f:0.87, 72 mm, wide angle, coupling lens corrected for 4 to 1 demagnification demagnified Laue transmission X-ray diffraction pattern of about 15.4 cm size from the fluorescent screen and projected it on to the 3.8 cm. photocathode of the image intensifying tube. Cine recording of changing Laue patterns in non-stop tensile testing of aluminum single crystals up to fracture revealed details of lattice rotation hitherto unnoticed in conventional deform, stop and shoot the picture tests.

Paper Details

Date Published: 15 September 1978
PDF: 5 pages
Proc. SPIE 0143, Applications of Electronic Imaging Systems, (15 September 1978); doi: 10.1117/12.956557
Show Author Affiliations
Narayan R. Joshi, Coppin State College (United States)

Published in SPIE Proceedings Vol. 0143:
Applications of Electronic Imaging Systems
Richard E. Franseen; Dieter K. Schroder, Editor(s)

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