PROPERTIES AND METHODS OF NONDESTRUCTIVE TESTING OF BOLTS FOR 7.62MM M14 RIFLES

Abstract

Studies were made to develop adequate inspection methods of evaluating properties of material used in the fabrication of the 7.62mm M14 bolts, and to determine the feasibility of using the developed method for final and in-process inspection. These studies included (1) investigation of bolt malfunction, (2) nondestructive tests re magnetic permeability comparisons, measurements of basic magnetic properties, oscilloscope wave form pattern studies, hardness investigations, (3) bolt segregation tests, (4) simulated impact tests, and (5) application to final and inprocess inspection. A test method combining Rockwell C surface hardness, magnetic permeability readings, and oscilloscope wave form patterns was developed to evaluate properties of material used in the 7.62mm M14 bolt. The combination test method was found to be too complicated to specify as a final or in-process inspection method. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 04, 1962
Accession Number
AD0282886

Entities

People

  • E. H. Abbe
  • H. P. Hatch
  • R. D. Korytoski

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Coercivity
  • Drop Tests
  • Fabrication
  • Flux Density
  • Heat Treatment
  • High Temperature
  • Impact Tests
  • Magnetic Properties
  • Malfunctions
  • Materials
  • Measurement
  • Oscilloscopes
  • Production
  • Test And Evaluation
  • Test Methods
  • Waveforms
  • Waves

Readers

  • Aerospace Test and Evaluation
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Metallurgy