Accession Number:

AD0270034

Title:

AN APPRAISAL OF BRITTLE FRACTURE TEMPERATURE OF ROLLED ARMOR STEEL BY THE NRL DROP WEIGHT TEST

Descriptive Note:

Corporate Author:

ARMY TANK-AUTOMOTIVE CENTER WARREN MICH

Personal Author(s):

Report Date:

1961-04-01

Pagination or Media Count:

1.0

Abstract:

Brittle fracture temperature determinations were made of 12-in.-thick rolled armor steels reflecting two chemical compositions. NilDuctility transition temperatures for the MnCr-Mo analysis varied from -50 to -110 F and for the Mn-Mo analysis from -80 to -130 F. During the early stages of this investigation a minor change in crack starter bead preparation was used. This change was continued in subsequent work and is offered as an alternative procedural step in drop weight specimen preparation. The use of several types of hard-facing electrode for crack starter beads and the influence of re-heat treatment after placement of crack starter beads on nil-ductility transition were also evaluated. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE