Accession Number : ADA953960

Title :   Development and Production of Experimental High-Strength Ferritic Electrodes.

Descriptive Note : Progress rept. 25 Apr 51-13 Jun 52,


Personal Author(s) : Sopher,R. P. ; Grable,G. B. ; Voldrich,C. B.

Report Date : 13 JUN 1952

Pagination or Media Count : 50

Abstract : The objective of this investigation was to investigate the suitability of the longitudinal notch-bend specimen: (1) for comparing the toughness of welded butt joints made in armor plate with high-yield-strength (100,000 to 110,000 psi) ferritic electrodes and an austenitic electrode (19-9 Mn); and (2) as a substitute for the ballistic H-plate for evaluating ferritic weld joints in rolled armor plate. Several groups of both H-plates and 6-inch wide notch-bend specimens were welded with high-yield-strength commercial and experimental ferritic electrodes and an austenitic electrode in 1-inch armor. This report covers the results of the bend tests made with three commercial electrodes. The transition from ductile to brittle behavior of bend specimens welded with the E7015 and austenitic electrodes occurred approximately 25 F lower than for the specimens welded with the E12015 electrodes. H-plate results will be reported on the completion of firing tests. No significant effect was found upon reducing the width of the notch-bend specimens from 6 inches to 3 inches. Absorbed-energy values of two heats of 3/4-inch armor were determined using both the notch-bend and Charpy-impact types of test specimen.

Descriptors :   *Armor plate, *Electrodes, *Welded joints, *Butt welding, Ferrites, Toughness, Austenite, Brittleness, High strength, Bending, Charpy impact tests

Subject Categories : Fabrication Metallurgy
      Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE