Accession Number:

ADA107760

Title:

Superplastic Aluminum Evaluation

Descriptive Note:

Final rept. 16 Apr 1979-31 Dec 1980

Corporate Author:

ROCKWELL INTERNATIONAL CORP THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s):

• Mahoney, M. W.
• Hamilton, C. W.

Report Date:

1981-06-01

Pagination or Media Count:

204.0

Abstract:

With the development of a process to produce fine grain aluminum alloys, it is now possible to superplastically form SPF structural aircraft components. This document presents results from several important areas which are considered to be critical to providing a realistic assessment of the technical and economic potential for superplastic forming structures using a high strength 7475 aluminum alloy. Areas of study included 1 the evaluation of structural applications 2 the determination of superplastic forming limits 3 a microstructural study of cavities formed during superplastic deformation 4 the application of hydrostatic gas pressures to suppress cavitation, and 5 the effect of superplastic deformation on subsequent service properties.

Descriptors:

• *MATERIAL FORMING
• *ALUMINUM ALLOYS
• *PLASTIC PROPERTIES
• COST EFFECTIVENESS
• TENSILE PROPERTIES
• HIGH STRENGTH ALLOYS
• CAVITIES
• NUCLEATION
• STRAIN RATE
• VAPOR PRESSURE
• GRAIN STRUCTURES(METALLURGY)
• FINE GRAINED MATERIALS
• CAVITATION
• HYDROSTATIC PRESSURE
• THERMAL PROPERTIES
• STRESSES
• TEST AND EVALUATION
• PLASTIC DEFORMATION

Subject Categories:

• Metallurgy and Metallography
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE