TUNGSTEN FORGING DEVELOPMENT PROGRAM.

Abstract

Forging billets obtained from arc melted and extruded, unalloyed tungsten ingots were used to demonstrate the applicability of a scaled-up forging process for producing thin-wall section components. A six-step forging sequence developed earlier in the program was simplified by eliminating one operation. Process reproducibility was determined from dimensional, metallographic and mechanical property data. As-forged thickness and sidewall concentricity measurements showed the variation in these dimensions to be within 0.030-0.040 in. for the design dimensions. Metallographic examination of as-forged sections revealed wrought microstructures similar to those obtained in earlier forgings. Recrystallization of the wrought structure occurred after 1 hour at 2500F. Determination of ductile-brittle transition temperature from tensile test data showed the transition to be at 375F. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1964
Accession Number
AD0431588

Entities

People

  • R. W. Redlinger

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Ductile Brittle Transition
  • Mechanical Properties
  • Microstructure
  • Phase Transformations
  • Thin Walls
  • Transition Temperature
  • Transitions
  • Tungsten
  • Walls

Fields of Study

  • Materials science

Readers

  • Metallurgy