Accession Number : AD0751976

Title :   The Correlation of Nondestructive Test Techniques with the Fracture Behavior of ATJ-S Graphite.

Descriptive Note : Technical rept. 30 Nov 68-Dec 70,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Shelton,W. L. ; Atkins,G. R.

Report Date : AUG 1972

Pagination or Media Count : 175

Abstract : Selected specimens of ATJ-S graphite were nondestructively evaluated and tensile tested in gas-bearing test facilities. The nondestructive test methods used on billets, specimen blanks, and finished specimens were visual inspection, alcohol wipe, radiography, and radiographic enhancement techniques. Correlations were made between nondestructive test indications and fracture location and strength. Low density areas were found to be the predominant weakening defect in this graphite. Fractographic examination of the fractured specimens revealed flaws which could be correlated with those flaws detected nondestructively and predicted from Griffith's theory. (Author)

Descriptors :   (*GRAPHITE, *NONDESTRUCTIVE TESTING), (*RADIOGRAPHY, GRAPHITE), FRACTURE(MECHANICS), PENETRATION, TENSILE PROPERTIES, DEFECTS(MATERIALS), SURFACE PROPERTIES, CRACKS, IMPURITIES

Subject Categories : Ceramics, Refractories and Glass
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE