A Fundamental Study of P/M (Powder Metallurgy) Processed Elevated Temperature Aluminum Alloys.

Abstract

Al-Fe-Ni powder containing 0.19 volume fraction of FeNiA19 dispersoid (approx. 0.18 micrometers) was mechanically alloyed (MA) and hot extruded. There is a significant enhancement in creep response compared to the same alloy without MA and microstructural stability is superior. Improvements in creep strength and microstructural stability are attributed to the presence of fine-scale (approx. 30nm) oxides/carbides introduced during MA distributed uniformly throughout the martix, at matrix-intermetallic interfaces, and on subgrain boundaries. The fine-scale dispersion inhibits coarsening and appears to interact with the diffusing Fe and Ni atoms. Keywords: Aluminum, Iron, Nickel, Alloys, Powder metallurgy, Rapid solidification, Mechanical alloying, Microstructure, Stability, Temperature, Mechanical properties, Dispersion, Strengthening.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1987
Accession Number
ADA181380

Entities

People

  • Alan Lawłey
  • M. J. Koczak

Organizations

  • Drexel University

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Chemical Compounds
  • Engineered Materials
  • Engineering
  • Grain Growth
  • Hardness
  • High Temperature
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Metallurgy
  • Metals
  • Microstructure
  • Powder Metallurgy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.