DEVELOPMENT OF BAR PROCESS FOR TD NICKEL-MOLYBDENUM ALLOY.

Abstract

A manufacturing process was developed for the production of 1-in.-diam. TDNiM (Ni-20%Mo-3%ThO2-0.30%Zr-0.01%C) alloy bar. The product bar was sound, uniform in quality and properties, and exhibited the highest intermediate temperature strength obtained to date in dispersion hardened alloy bar products of similar size. The bar process developed was the hot rotary GFM forging of as-extruded bar. The major factors which contributed to strength reproducibility were control of minor element chemistry, product purity and uniformity of microstructure. Rupture strength was influenced by thoria size, matrix grain size, and carbon level. Manufacturing changes adopted to achieve property reproducibility caused both thoria growth and carbon loss which reduced strength below the target properties.

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1967
Accession Number
AD0815504

Entities

People

  • William J. Barnett

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Alloys
  • Chemistry
  • Dispersions
  • Elements
  • Grain Size
  • Manufacturing
  • Microstructure
  • Molybdenum
  • Molybdenum Alloys
  • Production
  • Reproducibility

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Powder metallurgy of Titanium alloys.