# US 8,784,998 B2 · Structure having nanophase titanium node and nanophase aluminum struts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,998 B2 - Document ID: US8784998B2 - Status: Granted - Kind: B2 - Application number: 12/872,010 - Filed: 2010-08-31 - Published: 2012-03-01 - Granted: 2014-07-22 - Earliest claimed: 2010-08-31 - Assignees: Aerojet Rocketdyne of DE, Inc. - Applicants: Daniel P. Cap; Arunabh Bhattacharya - Inventors: Daniel P. Cap; Arunabh Bhattacharya - Web page: https://patentgrep.com/patent/US8784998B2 ## CPC - C22C 14/00: Alloys based on titanium - B23K 20/12: the heat being generated by friction; Friction welding - C22C 21/00: Alloys based on aluminium - C22C 21/08: with silicon - B22F 2998/00: Supplementary information concerning processes or compositions relating to powder metallurgy - B23K 2103/10: Aluminium or alloys thereof - B23K 2103/14: Titanium or alloys thereof - Y10T 428/12292: Workpiece with longitudinal passageway or stopweld material [e.g., for tubular stock, etc.] - Y10T 428/12347: Plural layers discontinuously bonded [e.g., spot-weld, mechanical fastener, etc.] - Y10T 428/12743: Next to refractory [Group IVB, VB, or VIB] metal-base component - Y10T 428/12764: Next to Al-base component - C22C: ALLOYS (treatment of alloys C21D, C22F) - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A structure includes a nanophase titanium node and a plurality of nanophase aluminum struts. Each of the plurality of nanophase aluminum struts is bonded to the nanophase titanium node at a weld joint. ## Claims ### Claim 1 A structure comprising: a nanophase titanium node having a plurality of receivers spaced around a central portion of the nanophase titanium node; a plurality of nanophase aluminum struts each having a nanophase aluminum tube; and a nanophase titanium adapter bonded to an end of the nanophase aluminum tube, each nanophase titanium adapter being bonded to a respective one of the plurality of receivers of the nanophase titanium node at a respective weld butt joint, each nanophase titanium adapter having a first end and a second end, the second end being bonded to the respective one of the plurality of receivers at the respective weld butt joint, wherein the nanophase titanium node, nanophase titanium adapter, and nanophase aluminum struts have microstructural features that are less than 100 nanometers in size. ### Claim 2 (depends on 1) The structure as recited in claim 1, wherein the nanophase aluminum struts have a nominal composition of at least 0.2 wt.% of nitrogen, 88.7-98.7 wt. % of aluminum, and 1-11 wt. % of a metal selected from a group consisting of magnesium, lithium, silicon, titanium, zirconium and combinations thereof. ### Claim 3 (depends on 2) The structure as recited in claim 2, wherein the nominal composition has 6-10.1 wt. % of an additional metal selected from the group consisting of zinc, copper, cobalt, nickel and combinations thereof. ### Claim 4 (depends on 2) The structure as recited in claim 2, wherein the nominal composition has 0.2-0.4 wt. % nitrogen. ### Claim 5 (depends on 1) The structure as recited in claim 1, wherein the nanophase titanium node has a nominal composition of 5.5-6.75 wt. % aluminum, 3.5-4.5 wt. % vanadium, 0.5-3.0 wt. % boron, and a balance of titanium. ### Claim 6 (depends on 5) The structure as recited in claim 5, wherein the nominal composition has 1.6-3.0 wt. % boron. ### Claim 7 (depends on 1) The structure as recited in claim 1, wherein each nanophase titanium adapter has a first cross sectional area at the first end and a second, greater cross sectional area at the second end. ### Claim 8 (depends on 1) The structure as recited in claim 1, wherein each nanophase titanium adapter includes a flange that is joined to the nanophase titanium node at the respective weld butt joint. ### Claim 9 (depends on 1) The structure as recited in claim 1, wherein the plurality of nanophase aluminum struts each have a nanophase titanium adapter joined thereto at a strut weld joint, and each nanophase titanium adapter is joined to a respective one of a plurality of receivers of the nanophase titanium node at the respective weld butt joint, each the respective weld butt joint being spaced apart from the corresponding strut weld joint. ### Claim 10 (depends on 1) The structure as recited in claim 1, wherein the microstructural features are at least one of grain sizes, intermetallic phases and reinforcement phases. ### Claim 11 (depends on 1) The structure as recited in claim 1, wherein the plurality of receivers extend outwardly, in respective directions, from the central portion of the node, and the direction of extension of one of the receivers is out-of-plane with respect to a plane containing the direction of extension of another one of the receivers. ### Claim 12 A structure comprising: a nanophase titanium node having a plurality of receivers spaced around a central portion of the nanophase titanium node; a plurality of nanophase aluminum struts each having a nanophase aluminum tube; and a nanophase titanium adapter metallurgically bonded to the nanophase aluminum tube, and each nanophase titanium adapter is metallurgically bonded to a respective one of the plurality of receivers at a respective weld butt joint, wherein the nanophase titanium node, nanophase titanium adapter, and nanophase aluminum struts have microstructural features that are less than 100 nanometers in size. ### Claim 13 (depends on 12) The structure as recited in claim 12, wherein the nanophase aluminum struts have a nominal composition of at least 0.2wt. % of nitrogen, 88.7-98.7 wt. % of aluminum, and 1 -11 wt. % of a metal selected from a group consisting of magnesium, lithium, silicon, titanium, zirconium and combinations thereof. ### Claim 14 (depends on 12) The structure as recited in claim 12, wherein the nanophase titanium node has a nominal composition of 5.5 -6.75 wt. % aluminum, 3.5 -4.5 wt. % vanadium, 0.5-3.0 wt. % boron, and a remainder of titanium. ### Claim 15 (depends on 12) The structure as recited in claim 12, wherein each nanophase titanium adapter has a first cross sectional area at a first end and a second, greater cross sectional area at a second end, and the second end is bonded to the respective one of the plurality of receivers at the respective weld butt joint. ### Claim 16 (depends on 12) The structure as recited in claim 12, wherein the microstructural features are at least one of grain sizes, intermetallic phases and reinforcement phases. ### Claim 17 (depends on 12) The structure as recited in claim 12, wherein the plurality of receivers extend outwardly, in respective directions, from the central portion of the node, and the direction of extension of one of the receivers is out-of-plane with respect to a plane containing the direction of extension of another one of the receivers.