NASA SBIR 2010 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER: 10-1 X5.02-9152
SUBTOPIC TITLE: Advanced Fabrication and Manufacturing of Metallic and Hybrid Materials for Lightweight Structures
PROPOSAL TITLE: Modeling -based Processing of Al-Li Alloys for Delamination Resistance

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Black Laboratories, L.L.C.
12050 Jefferson Avenue, Ste. 240
Newport News, VA 23606 - 2385
(757) 269-0230

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Roy Crooks
gm@black-labs.org
12050 Jefferson Avenue, Suite 240
Newport News, VA 23606 - 4385
(757) 269-0230

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 2
End: 3

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Al-Li alloys are of interest for use in aerospace structures due to the desirable combination of high strength and low density. However, high strength Al-Li alloys exhibit an intergranular delamination fracture mode which has limited widespread structural applications. Previous work at NASA LaRC, under limited testing, found that the failures tend to be between grains of the two Brass texture component variants. Taylor Factor calculations show these to have severe strain incompatibility. These grain orientations are known to develop as a preferred orientation in Al-Li-X-Zr alloys during severe, hot rolling. This program will verify the results and work with Industry to develop an alternative, delamination-free process.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Aluminum-Lithium alloys are used for cryotanks by NASA. Structural applications could also benefit from the low specific weight and high specific stiffness available with these alloys, if the delamination problem can be solved. Fail safe design philosophy requires better reliability for structures, and this approach, if successful, will allow widespread use of these alloys in NASA hardware.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Designers have been reluctant to use Al-Li in a structural capacity on aircraft for the very problem we are attempting to solve with this program: delamination fracture. If this problem is solved, then a number of applications will benefit from the high strength and low density of these alloys, due to lower fuel costs and higher vehicle load capabilities. The higher cost of Al-Li-X alloys is worthwhile for applications which benefit from the improvements in specific strength and stiffness. These include, in order of fuel cost savings: spacecraft, aircraft, ground vehicles and shipping.

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
Analytical Methods
Characterization
Metallics
Models & Simulations (see also Testing & Evaluation)
Processing Methods
Spacecraft Design, Construction, Testing, & Performance (see also Engineering; Testing & Evaluation)


Form Generated on 09-03-10 12:12