Program to Develop High Strength Aluminum Powder Metallurgy Mill Products - Phase IV-B-Scale - up to 3200 lb Billet
Abstract
High strength aluminum powder metallurgy mill products have been scaled up to plate, extrusions, and forgings from 1545-kg (3400-lb) billets. The scale-up process started with atomized alloy powder, which was preheated and vacuum hot pressed to fully dense billets for further production mill fabrication to plate, extrusions, and die forgings. Engineering properties of these products indicate that P/M plate duplicated property capability of small- scale lab-produced plate, developing 13% higher strength, equal toughness, 30- 50% higher notched fatigue strength, and superior corrosion and stress corrosion compared to existing commercial I/M alloys. Scaled-up P/M extrusions and die forgings were weaker than earlier, lab-scale products but still developed superior stress corrosion resistance and 30 to 80% higher notched fatigue strength compared to existing commercial alloys. An Alcoa-funded follow-on study is in progress to develop billet processing and product fabrication variations leading to duplicating properties of lab-scale P/M products for all billet sizes and all products. A report on that study will be distributed when completed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 25, 1977
- Accession Number
- ADA039862
Entities
People
- W. S. Cebulak
Organizations
- Alcoa