Modeling-Based Processing of Al-Li Alloys for Delamination Resistance

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CH14P
Agency Tracking Number: 104848
Amount: $80,005.00
Phase: Phase I
Program: SBIR
Awards Year: 2011
Solicitation Year: 2010
Solicitation Topic Code: X5.02
Solicitation Number: N/A
Small Business Information
Black Laboratories, L.L.C.
12050 Jefferson Avenue, Suite 240, Newport News, VA, 23606-2385
DUNS: 099194958
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Roy Crooks
 Principal Investigator
 (757) 269-0230
 gm@black-labs.org
Business Contact
 Tracy Crooks
Title: Business Official
Phone: (757) 269-0230
Email: gm@black-labs.org
Research Institution
 Stub
Abstract
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.

* information listed above is at the time of submission.

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