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A composite aluminium panel comprising two parallel plates and/or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet between the parallel plates and/or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolled sheet of composition

A composite aluminium panel comprising two parallel plates and/or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet between the parallel plates and/or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolled sheet of composition (in weight percent): Mg 1.5-6.0, Mn 0.3-1.4, Zn 0.4-5.0, Fe up to 0.5, Si up to 0.5, Zr up to 0.30; optionally one or more of Cr 0.05-0.3, Ti 0.01-0.20, V 0.05-0.25, Ag 0.05-0.40, and Cu up to 0.40; and other elements up to 0.05 each, 0.15 total, with a balance of Al; and having in an H-condition or in an O-condition a ratio of PS/UTS in the range of 0.4 to 0.9 and having good roll formability.

대표청구항 ▼

1. A composite aluminium panel comprising two parallel plates and/or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet by means of welding between the parallel plates and/or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolle

1. A composite aluminium panel comprising two parallel plates and/or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet by means of welding between the parallel plates and/or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolled sheet of composition (in weight percent):Mg1.5-6.0Mn0.3-1.4Zn0.4-1.2Feup to 0.5Siup to 0.5Zr?up to 0.30optionally, at least one member of the group consisting of:Cr0.05-0.30Ti0.01-0.20V0.05-0.25Ag0.05-0.40Cu?up to 0.40other elements up to 0.05 each, 0.15 totalAlbalanceand having in an H-condition or in an O-condition a ratio of PS/UTS in the range of 0.4 to 0.9 and having good roll formability, wherein the corrugated aluminium stiffener sheet has a thickness in the range of up to 3.0 mm.2. A composite aluminium panel according to claim 1, wherein each parallel plate and/or sheet has a thickness in the range of up to 25 mm and the two parallel plates and/or sheets are spaced apart by a distance of 10 to 300 mm.3. A composite aluminium panel in accordance with claim 1, further comprising a cladding on at least one side of the surface of the corrugated sheet and the cladding is a member of the group consisting of:(i) the cladding is of a higher purity aluminium alloy than said rolled sheet; (ii) the cladding is of the Aluminium Association AA1000 series; (iii) the cladding is of the Aluminium Association AA6000 series; (iv) the cladding is of the Aluminium Association AA4000 series; and (v) the cladding is of the Aluminium Association AA7000 series. 4. A composite aluminium panel in accordance with claim 1, wherein at least one of the two parallel plates and/or sheets are within the same compositional window as the corrugated aluminium stiffener.5. A method of making the composite aluminium panel of claim 1 comprising:forming the aluminium rolled product into a corrugated aluminium stiffener sheet; and attaching a first parallel sheet or plate, to said corrugated aluminium stiffener sheet of an aluminium alloy which is of the same or different composition as the first parallel sheet and/or plate in a composite aluminium panel, attaching a second parallel sheet or plate to the corrugated aluminium stiffener sheet of an aluminium alloy which is of the same or different composition as the second parallel sheet and/or plate in the composite aluminium panel, wherein the stiffener sheet is attached to the first and second plates or sheets by welding to have the corrugated sheet between the first and second parallel sheets or plates, wherein the corrugated aluminium stiffener sheet has a thickness in the range of up to 3.0 mm. 6. A welded structure comprising at least one composite aluminium panel according to claim 1.7. A composite aluminium panel according to claim 1 for ship building.8. A composite aluminium panel according to claim 1 for marine offshore construction.9. A composite aluminium panel according to claim 1, wherein the corrugated aluminium stiffener sheet has a thickness in the range of 0.2 to 1.0 mm.10. A composite aluminium panel in accordance with claim 1, wherein the two parallel plates and/or sheets have been secured to the corrugated aluminium stiffener sheet by means of laser welding.11. A composite panel according to claim 1 for application in a marine environment.12. A composite aluminium panel in accordance with claim 1, wherein the two parallel plates and/or sheets have been secured to the corrugated aluminium stiffener sheet by means of friction stir welding.13. A composite aluminium panel comprising two parallel sheets and/or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet by means of welding between the parallel plates and/or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolled sheet of composition (in weight percent):Mg?5.0-6.0Mn?0.6-1.2Zn?0.4-1.5Zr0.05-0.25Crup to 0.3Tiup to 0.2Feup to 0.5Siup to 0.5Cuup to 0.4Agup to 0.4balance Aluminium and inevitable impurities, and having in an H-condition or in an O-condition a ratio of PS/UTS in the range of 0.4 to 0.9 and having good roll formability, wherein the corrugated aluminium stiffener sheet has a thickness in the range of up to 3.0 mm. 14. A method of making the composite aluminium panel of claim 13 comprising:forming the aluminium rolled product into a corrugated aluminium stiffener sheet; and attaching a first parallel sheet or plate, to said corrugated aluminium stiffener sheet of an aluminium alloy which is of the same or different composition as the parallel sheet and/or plate in a composite aluminium panel, attaching a second parallel sheet or plate to the corrugated aluminium stiffener sheet of an aluminium alloy which is of the same or different composition as the second parallel sheet and/or plate in the composite aluminium panel, wherein the stiffener sheet is attached to the first and second plates or sheets by welding to have the corrugated sheet between the first and second parallel sheets or plates, wherein the corrugated aluminium stiffener sheet has a thickness in the range of up to 3.0 mm. 15. A method according to claim 14, wherein Zn is 0.4-0.9%.16. A composite aluminium panel according to claim 13, wherein Zn is 0.4-0.9%.17. A welded structure comprising at least one composite aluminium panel according to claim 13.18. A composite aluminium panel according to claim 13, wherein each parallel plate and/or sheet has a thickness in the range of up to 25 mm and the two parallel plates and/or sheets are spaced apart by a distance of 10 to 300 mm.19. A composite aluminium panel in accordance with claim 13, further comprising a cladding on at least one side of the surface of the corrugated sheet and the cladding is a member of the group consisting of:(i) the cladding is of a higher purity aluminium alloy than said rolled sheet; (ii) the cladding is of the Aluminium Association AA 1000 series; (iii) the cladding is of the Aluminium Association AA6000 series; (iv) the cladding is of the Aluminium Association AA4000 series; and (v) the cladding is of the Aluminium Association AA7000 series. 20. A composite aluminium panel in accordance with claim 13, wherein at least one of the two parallel plates and/or sheets are within the same compositional window as the corrugated aluminium stiffener.21. A composite aluminium panel according to claim 13 for ship building.22. A composite aluminium panel according to claim 13 for marine offshore construction.23. A composite aluminium panel according to claim 13, wherein the corrugated aluminium stiffener sheet has a thickness in the range of 0.2 to 1.0 mm.24. A composite aluminium panel in accordance with claim 13, wherein the two parallel plates and/or sheets have been secured to the corrugated aluminium stiffener sheet by means of laser welding.25. A composite panel according to claim 13 for application in a marine environment.26. A composite aluminium panel in accordance with claim 13, wherein the two parallel plates and/or sheets have been secured to the corrugated aluminium stiffener sheet by means of friction stir welding.27. A composite aluminium panel comprising two parallel plates and/or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet between the parallel plates and/or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolled sheet of composition (in weight percent):Mg1.5-6.0Mn0.3-1.4Zn0.4-5.0Feup to 0.5Siup to 0.5Zr?up to 0.30optionally, at least one member of the group consisting of:Cr0.05-0.30Ti0.01-0.20V0.05-0.25Ag0.05-0.40Cu?up to 0.40other elements up to 0.05 each, 0.15 totalAlbalanceand having in an H-condition or in an O-condition a ratio of PS/UTS in the range of 0.4 to 0.9 and having good roll formability, wherein the corrugated aluminium stiffener sheet has a thickness in the range of up to 3.0 mm.28. A composite aluminium panel in accordance with claim 27 further comprising contacting the composite panel with a marine environment.29. A composite aluminium panel comprising two parallel sheets and/or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet between the parallel plates and/or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolled sheet of composition (in weight percent):Mg?5.0-6.0Mn?0.6-1.2Zn?0.4-1.5Zr0.05-0.25Crup to 0.3Tiup to 0.2Feup to 0.5Siup to 0.5Cuup to 0.4Agup to 0.4balance Aluminium and inevitable impurities, and having in an H-condition or in an O-condition a ratio of PS/UTS in the range of 0.4 to 0.9 and having good roll formability, wherein the corrugated aluminium stiffener sheet has a thickness in the range of up to 3.0 mm. 30. A composite aluminium panel in accordance with claim 29 further comprising contacting the panel with a marine environment.