Microstructural Response of Aluminum-Magnesium Alloys to Thermomechanical Processing.
Abstract
Mechanisms of microstructural refinement in aluminum-magnesium alloys were investigated. Alloys containing from 15% to 19% magnesium were exposed to various processing schemes, and the resulting microstructures were examined. Isothermal forging resulted in some refinement depending on the temperature, strain and strain rate. However, all samples isothermally forged exhibited microstructures having relatively large amounts of the brittle intermetallic phase present. The addition of tertiary alloy elements resulted in little improvement in microstructure. Non-isothermal schemes resulted in the most promising microstructures. A process of high temperature soaking followed by deformation at relatively lower temperatures is concluded to be the most promising means for processing alloys with magnesium contents below 15% by weight.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1977
- Accession Number
- ADA049949
Entities
People
- Charles Pierson Bingay
Organizations
- Naval Postgraduate School