On the Metallography of Aluminum
Abstract
A metallographic method was described in which dislocation etchings are obtained in minimum time and microstructural details can be obtained from samples corresponding to purities of Al 99.99 and Al 99.7. The steps involved in the technique are grinding, electrolytic polishing, dislocation etching, and anodic oxidation. Some examples obtained with the aid of this method were described. The method provides data on the presence of two phases, their configurations, and distribution; the density and distribution of dislocations on the basis of etched figures; the orientation of the crystals; and recovery and recrystallization. Grain-size determination is also possible. The method is suitable for AlMg3 and AlMgSi also.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 25, 1972
- Accession Number
- AD0747086
Entities
People
- Erna Weiland
- Gunther Gonschior
Organizations
- National Air and Space Intelligence Center