Effect of Spot and Stud Welding on ESR 4340 Steel Armor.

Abstract

The object of this project was to determine the effect of spot and stud welding on heat-treated ESR armor. It was noted that a hard layer of untempered martensite formed in the base metal below the spot and stud welds. Variations in welding technique did not remove or reduce this hard layer. The hard layer caused the welded appendage to be separated from the plate by the shock wave produced by ballistic impact. Heat treatment of the stud welds reduced the hardness of the hard layer without significant effect on the base plate. This reduced the tendency for the appendage to spall off as a result of the ballistic shock wave. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1978
Accession Number
ADA054025

Entities

People

  • Donald C. Buffum

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Armor Plate
  • Heat Treatment
  • Joining
  • Materials
  • Materials Laboratories
  • Mechanics
  • Metals
  • Phase Shift
  • Projectiles
  • Security
  • Shock Waves
  • Spot Welding
  • Spot Welds
  • Stud Welding
  • Waves
  • Welding
  • Welds

Fields of Study

  • Materials science

Readers

  • Explosive Engineering.
  • Metallurgy