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 atomization, and the rotating electrode process, were consolidated into dense billets by hot isostatic pressing (HIP) and/or extrusion. 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. Detailed analyses of microstructure, heat treatment, and mechanical properties are presented for all P/M alloys and compared to equivalent cast materials.

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Document Details

Document Type
Technical Report
Publication Date
Jul 31, 1972
Accession Number
AD0749679

Entities

People

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

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Manufacturing
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Metallurgy
  • Powder Metallurgy
  • Solid Solutions
  • Stress Strain Relations
  • Surface Tension
  • Tensile Properties
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster