Accession Number : ADA118280

Title :   A Comparison of Microstructure and Properties of Equivalent Strength Ingot Metallurgy and Powder Metallurgy 7XXX Aluminum Alloys.

Descriptive Note : Final rept. Aug 79-Sep 80,

Corporate Author : AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH

Personal Author(s) : Doerr,Stephen H

PDF Url : ADA118280

Report Date : Aug 1981

Pagination or Media Count : 183

Abstract : Microstructure and property relationships of equivalent strength ingot and powder metallurgy (I/M and P/M) 7XXX aluminum alloy die forgings were examined. Fatigue, toughness and corrosion behavior are discussed. Unlike the I/M product, the P/M material did not exhibit a reduction in S-N fatigue behavior in the transverse orientation. Since toughness anisotropy is not similarly dependent upon check initiation variables, no such anomaly occurred in this property. P/M material was more resistant to exfoliation corrosion in any condition of heat treatment than the most resistant heat treatment condition of the I/M material.

Descriptors :   *Aluminum alloys, *Microstructure, *Fatigue(Mechanics), *Toughness, *Corrosion resistance, *Strength(Mechanics), Castings, Powder alloys, Grain structures(Metallurgy), Grain size, Heat treatment, Cyclic tests, Fatigue tests(Mechanics), Exfoliation, Charpy impact tests, Cracking(Fracturing), Fatigue life, Powder metallurgy

Subject Categories : Properties of Metals and Alloys
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE