Accession Number:

ADB006891

Title:

Superplastic Forming of Titanium Structures

Descriptive Note:

Final rept. 1 Feb 1973-30 Apr 1975

Corporate Author:

ROCKWELL INTERNATIONAL LOS ANGELES CA LOS ANGELES AIRCRAFT DIV

Personal Author(s):

• Hamilton, C. H.
• Stacher, G. W.
• Mills, J. A.
• Li, H. W.

Report Date:

1975-04-01

Pagination or Media Count:

264.0

Abstract:

This program was directed at the establishment of superplastic forming of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo alloys as a production process. Forming studies were pursued to evaluate the process parameters of superplastic forming and to extend the process to forming aircraft structural components. A detailed study was carried out on the effect of forming parameter variations with the two titanium alloys and two configurations. It was found that the degree of forming was directly related to time at elevated temperatures. Optimum sealing techniques to eliminate atmospheric contamination of the titanium sheet material were established. Twenty-three parts were formed in six different configurations to assess the forming parameters needed to fabricate components of varying shapes and dimensions. The process was then extended to superplastic forming of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo sheet metal alloys through the fabrication of full-scale complex structural configurations. A total of 20 full-scale formed parts was produced utilizing gas pressure forming at elevated temperatures. Structural testing was accomplished on each configuration and alloy showing the compatibility of superplastic formed parts with aircraft structural integrity requirements. Substantial cost savings were shown to be possible.

Descriptors:

• *TITANIUM ALLOYS
• *MATERIAL FORMING
• MECHANICAL PROPERTIES
• MICROSTRUCTURE
• AIRCRAFT
• TOOLS
• HIGH TEMPERATURE
• DEFORMATION
• TENSILE PROPERTIES
• STRUCTURES
• DIES
• STRAIN RATE
• CONFIGURATIONS
• SHEETS
• PRESSURE
• AIRFRAMES
• PLASTIC PROPERTIES
• ARGON
• ELONGATION
• INSERTS

Subject Categories:

• Aircraft
• Properties of Metals and Alloys
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE