Program to Develop High Strength Aluminum Powder Metallurgy Products. Phase 4A - Vacuum Process Verification

Abstract

Six P/M alloy-powders were prepared for this vacuum-preheat process verification. P/M 2-in. diameter extruded rod for extrusion evaluation was fabricated from vacuum preheated and hot pressed (VAC-preheat) compacts. Camparison ingot metallurgy (I/M) 7050 extrusions were also prepared. Preliminary test results show P/M alloys MA86, MA87, MA89 and MA67 developed good transverse fracture toughness and ductility, with transverse fracture toughness comparable to that achieved in VAC-preheat MA83 alloy. This verified the reproducibility of the fracture toughness improvement previously indicated for VAC-preheat over inert-gas (FCE) preheat. P/M 4-in. diameter extruded stock for die forging was fabricated from VAC-preheated 140-lb compacts. Comparison I/M 7050 extruded rod was also prepared.

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Document Details

Document Type
Technical Report
Publication Date
Oct 12, 1972
Accession Number
AD0904979

Entities

People

  • W. S. Cebulak

Organizations

  • Alcoa

Tags

DTIC Thesaurus Topics

  • Cold Water
  • Heat Treatment
  • Hot Pressing
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Plastic Explosives
  • Powder Metallurgy
  • Powders
  • Resistance
  • Solution Heat Treatment
  • Stress Corrosion
  • Tensile Properties
  • Tensile Strength
  • Test And Evaluation
  • Vacuum Pumps
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Aerospace Engineering
  • Electronics Engineering
  • Metallurgy