Multi-Layer Approach for Corrosion Resistance of Aircraft Aluminum Alloys

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$99,993.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
N00014-09-M-0403
Agency Tracking Number:
O091-C03-4005
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
TOUCHSTONE RESEARCH LABORATORY, LTD.
The Millennium Centre, R.R. 1, Box 100B, Triadelphia, WV, 26059
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
101582922
Principal Investigator:
Harold Stauver
Director of Research & Development
(304) 547-5800
hls@trl.com
Business Contact:
Brian Joseph
President, COO
(304) 547-5800
bej@trl.com
Research Institution:
n/a
Abstract
The objective of this proposed Phase I study is to develop an alternate production practice for high-strength aircraft aluminum alloys via an experimental layering process in order to enhance stress corrosion cracking (SCC) resistance. The basic operational processing procedure is to produce aluminum through roll bonding of a composite of several layers of standard material such that the grain shape/orientation alternates through the through-thickness plane of the finished plate. It is known from the literature that stress-corrosion cracking will propagate in the short-transverse direction and to some degree in the long transverse direction. The intent of this investigation will be to determine whether a layering of previously processed aircraft plate in 0-90 and 0-45 orientations can result in a microstructure that will inhibit the progress of SCC damage through the thickness plane of the plate material. The experiment will compare three conditions: i) standard process aircraft alloys, ii) cross-rolled aircraft material, and iii) layered material produced from standard un-clad aircraft plate. If the Phase I effort is successful, more extensive testing and scale-up attempts will take place during Phase II.

* information listed above is at the time of submission.

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