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


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a118280.pdf


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