Accession Number : AD0635794

Title :   CORRELATION OF LABORATORY TESTS WITH FULL SCALE SHIP PLATE FRACTURE TESTS: A STUDY OF STRAIN GRADIENTS.

Descriptive Note : Progress rept.

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK MINERAL INDUSTRIES EXPERIMENT STATION

Personal Author(s) : Klier, E. P. ; Wagner,F. C. ; Fisher,J. L. ; Gensamer,M.

Report Date : 08 JUN 1949

Pagination or Media Count : 84

Abstract : Strain gradients normal to fracture surfaces were determined. These fracture surfaces were developed under the following conditions of test: (1) V-notch Charpy bars broken by impact at various locations within the transition zone, (2) V-notch Charpy bars bent, but not completely broken, by impact above the transition temperature, (3) slow bend Schnadt type bars broken below the transition temperature, and (4) 72-inch wide, center notch, tensile specimens broken with ductile and brittle behavior. The strain gradients were studied by means of hardness tests, metallographic methods and X-ray analysis. It is concluded that true cleavage separation is not accompanied by a measurable strain gradient but most 'brittle' or 'cleavage' fractures, so classified on the basis of gross appearance, contain some areas separated by a shear mechanism. (Author)

Descriptors :   (*SHIP PLATES, STEEL), (*STEEL, FRACTURE(MECHANICS)), SHIP HULLS, STRAIN(MECHANICS), HARDNESS, METALLOGRAPHY, SURFACES

Subject Categories : Metallurgy and Metallography
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE