Titanium alloy (15V-3Cr-3Sn-3Al) for aircraft data recorder
First Claim
1. A flight data recorder housing comprising a titanium alloy consisting essentially of
said housing having been simultaneously formed and solution heat treated at an elevated temperature, said alloy having been aged to an ultimate tensile strength less than 200 ksi.
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Accused Products
Abstract
An aircraft flight data recorder housing comprising a titanium alloy having a nominal composition of 15 weight percent vanadium, 3 weight percent chromium, 3 weight percent tin, and 3 weight percent aluminum with the balance being titanium and, within limitations, certain trace elements. The alloy is simultaneously hot formed and solution heat treated at temperatures on the order of 1400° F. to 1500° F. to fabricate the recorder housing.
34 Citations
14 Claims
- 1. A flight data recorder housing comprising a titanium alloy consisting essentially of
- space="preserve" listing-type="tabular">______________________________________ Element Weight percent (wt. %) ______________________________________ V 14 to 16 Cr 2.5 to 3.5 Sn 2.5 to 3.5 Al 2.5 to 3.5 O.sub.2 0.13 max N.sub.2 0.03 max C 0.03 max H.sub.2 0.015 max Fe 0.30 max Y 0.005 max Residual elements, each 0.10 max Residual elements, total 0.30 max Ti Balance, ______________________________________
said housing having been simultaneously formed and solution heat treated at an elevated temperature, said alloy having been aged to an ultimate tensile strength less than 200 ksi. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- 8. A method for preparing a flight data recorder housing comprising a titanium alloy exhibiting high strength and fracture toughness wherein said alloy consists essentially of
- space="preserve" listing-type="tabular">______________________________________ Element Weight percent (wt. %) ______________________________________ V 14 to 16 Cr 2.5 to 3.5 Sn 2.5 to 3.5 Al 2.5 to 3.5 O.sub.2 0.13 max N.sub.2 0.03 max C 0.03 max H.sub.2 0.015 max Fe 0.30 max Y 0.005 max Residual elements, each 0.10 max Residual elements, total 0.30 max Ti Balance, ______________________________________
said method comprising the steps of; a. formulating said alloy and creating an ingot, b. forging said ingot and rolling sheet stock therefrom, c. simultaneously solution treating and forming a flight data recorder housing from said sheet stock at an elevated temperature, and d. aging said alloy to an ultimate tensile strength level less than 200 ksi. - View Dependent Claims (9, 10, 11, 12, 13, 14)
Specification
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- Resources
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Current AssigneeSundstrand Data Control Incorporated Overlake Industrial Park Redmond WA 98052
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Original AssigneeSundstrand Data Control, Inc.
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InventorsWhite, Kenneth W., Spurr, William F.
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Primary Examiner(s)Skiff, Peter K.
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Application NumberUS06/572,228Time in Patent Office908 DaysField of Search420/418-420, 148/407, 148/421, 148/11.5 F, 148/12.7 BUS Class Current148/407CPC Class CodesC22C 14/00 Alloys based on titaniumG12B 17/08 from influences producing m...H05K 5/021 specially adapted for data ...H05K 5/0213 Venting apertures; Construc...
