Accession Number : AD0764779

Title :   Evaluation of a Radiographic Paper System Using Ultraviolet Fluorescent Screens. Part 1. Program Objectives, Technique and Sensitivity Data for F-1 Screen.

Descriptive Note : Final technical rept. May 71-Feb 72,

Corporate Author : DAYTON UNIV OHIO RESEARCH INST

Personal Author(s) : Holloway,J. A. ; Henderson,T. R.

Report Date : SEP 1972

Pagination or Media Count : 93

Abstract : Ultraviolet fluorescent screens are being evaluated as part of a radiographic paper system over an X-ray energy range from 25KVCP to 300KVCP in order to determine its potential for replacing X-ray film at a cost savings in certain applications. The report gives the technique curves obtained for 2024 aluminum from 25KVCP to 150KVCP without screens and with Kodak Industrex Intensifying Screen F-1. Detail sensitivity obtained with penetrameters is reported with this screen for selected thicknesses of aluminum over this energy range. A COMPARISON IS MADE OF FILM RADIOGRAPHY AND PAPER RADIOGRAPHY USING TWO DIFFERENT TYPES OF FLUORESCENT SCREENS WITH TITANIUM AND ALUMINUM HONEYCOMB SAMPLES. These samples illustrate varying degrees of foam adhesive used to bond the honeycomb to the spar or end closure, water entrapped in the cells, deformed and crushed core. Another application of paper radiography is inspecting wax molds used for making investment cast turbine blades for cracks and porosity. Work to date has demonstrated that the paper, F-1 screen combination is capable of 2% sensitivity over an energy range from 50KVCP to 150KVCP through aluminum. With a speed over 10 times that of Class II film and 10 second processing, the system not only saves time, but offers the potential for saving as much as two thirds over film costs. It is recommended that the Air Force consider this system for radiography of non-critical structural and engine components. (Author, modified-PL)

Descriptors :   (*RADIOGRAPHY, *FLUORESCENT SCREENS), NONDESTRUCTIVE TESTING, X RAY PHOTOGRAPHY, PHOTOGRAPHIC MATERIALS, PHOTOGRAPHIC CONTRAST, PHOTOGRAPHIC IMAGES, ALUMINUM ALLOYS, TITANIUM ALLOYS, HONEYCOMB CORES

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE