Innovative Approaches to the Development of Corrosion Resistant Aircraft Alloys

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-08-C-0333
Agency Tracking Number: N08A-010-0409
Amount: $69,906.00
Phase: Phase I
Program: STTR
Awards Year: 2008
Solitcitation Year: 2008
Solitcitation Topic Code: N08-T010
Solitcitation Number: 2008.A
Small Business Information
ATI, INC.
1505, Bull Lea Road, Lexington, KY, 40511
Duns: 807312678
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Alex Cho
 President &Chief Technology Officer
 (304) 541-1825
 alexcho_sp@hotmail.com
Business Contact
 Alex Cho
Title: President&Chief technology Officer
Phone: (304) 541-1825
Email: alexcho_sp@hotmail.com
Research Institution
 THE OHIO STATE UNIV.
 Rudolf G Buchheit
 177 Watts hall
2041 College Road
Columbus, OH, 43210
 (614) 292-6085
 Nonprofit college or university
Abstract
Aluminum alloys are known to suffer from Stress Corrosion Cracking(SCC). SCC of high strength alloys can proceed rapidly, and can lead to devastating structural failures. However, a solid understanding of combined interactions of metallurgical, environmental and mechanical factors surrounding the crack tip during SCC is still elusive. Therefore, Al alloy developement for high corrosion resistance has been empirical in nature. The objective of this study is to understand the effect of microstructure in conjuction with the local environment(chemical and electrochemical)on the transition behavior from the incubation regime to high rate crack propagation regime during SCC. A quantitative predictive model will be developed based on the mechanistic underestanding fo SCC. This model will be utilzed in development of a new Al alloy most suitable for Navy aircrafts which normally operates in the most severe environment.

* information listed above is at the time of submission.

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