Metallurgical Examination of Two 1/4 in. Rolled Homogeneous Armor Plates which Exhibited Differences in Steel Soundness under Ballistic Tests

Abstract

In this report two 1/4 in. plates were examined one of which exhibited back spalls when subjected to impacts with cal. .30 AP M2 projectiles at a velocity such that the jacket went through the plate; the other plate exhibited a clean punching condition under the same circumstances. It was found that a centerline plane of weakness caused by a concentration of silicate type stringers was responsible forthe back spalls. This plane of weakness was not revealed by the fracture test for steel soundness yet its presence was disclosed by the fracture test for steel soundness yet its presence was disclosed by the macroetch test and a special torsion test.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 28, 1944
Accession Number
ADA954292

Entities

People

  • P. V. Riffin

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Armor
  • Armor Plate
  • Buildings And Structures
  • Metals
  • Molybdenum
  • Munitions
  • Ordnance Laboratories
  • Projectiles
  • Research Facilities
  • Rolled Homogeneous Armor
  • Silicates

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Systems Analysis and Design
  • ballistics.