Metallurgical Examination of Eighteen Pieces of 25/64 Inch Thick Rolled Homogeneous Armor

Abstract

Metallurgical examination of 18 pieces of armor plate 25/64-in x 2-in x 8-in cur from heat SCN219-1, rolled by Ford Motor Company and heat treated by Standard Steel Spring Company has been completed. This material spalled badly when tested with cal. .50APM2 ammunition under requirements of AXS-495. The results of this investigation indicae that spalling was due to the presence of segregations of elongated silicate nonmetallic inclusions in the material. This condition was revealed by the torsion test, microscopic examination, and also by 'woodiness' in the fracture test for steel soundness. A woody condition in rolled armor is indicative of poor quality plate and therefore is not desirable in food quality plate.

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Document Details

Document Type
Technical Report
Publication Date
Feb 16, 1945
Accession Number
ADA954962

Entities

People

  • M. Yoffa

Tags

DTIC Thesaurus Topics

  • Ammunition
  • Armor
  • Armor Plate
  • Buildings And Structures
  • Inclusions
  • Intervals
  • Materials
  • Research Facilities
  • Rolled Homogeneous Armor
  • Silicates
  • Standards
  • Transverse

Fields of Study

  • Materials science

Readers

  • Metallurgy