Structure and Property Control through Rapid Quenching of Liquid Metals

Abstract

Various powder metallurgy (P/M) and quench-casting techniques were employed to generate extremely fine dendrite arm spacings and homogeneous structures. Iron, nickel and cobalt-base alloy powders, produced by steam atomization (coarse powders), argon atomization, vacuum atmoization, and the rotating electrode process, were consolidated into dense billets by hot isostatic pressing (HIP) and/or extrusion. New powder processes based on separating solid nodules from a liquid-solid mixture and random break up of a fine stream of liquid metal into spherical particles are being evaluated. The hot working properties of P/M billets and quench-cast bars were evaluated by hot rolling, high strain rate tests, and creep (superplastic) testing. Two P/M superalloys, MAR-M-509 (cobalt-base) and IN-100 (nickel-base) after HIP and hot extrusion demonstrated excellent hot workability under high strain rate and creep forming conditions, respectively.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
AD0739340

Entities

People

  • Ali S. Argon
  • Merton C. Flemings
  • Nicholas J. Grant
  • Regis M. N. Pelloux

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemistry
  • Heat Energy
  • Heat Of Fusion
  • Heat Treatment
  • Liquid Metals
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Metallurgy
  • Powder Metallurgy
  • Solid Solutions
  • Tensile Properties
  • Tensile Strength
  • Thermodynamics

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster