High strength 7xxx aluminum alloys and methods of making the same

A technology of aluminum alloy and aluminum alloy products, applied in aircraft control, transportation and packaging, seat arrangement, etc., can solve difficult problems and achieve high-strength effects

Pending Publication Date: 2019-11-15
NOVELIS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, achieving such a goal is even more difficult for 2 mm sheet gauges, as expected by automotive OEMs

Method used

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  • High strength 7xxx aluminum alloys and methods of making the same
  • High strength 7xxx aluminum alloys and methods of making the same
  • High strength 7xxx aluminum alloys and methods of making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Twelve alloys were prepared for strength and elongation testing (see Table 4). Alloys V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, and V12 were prepared according to the methods described herein. The elemental composition of the alloys tested is shown in Table 4, the balance being aluminum. The elemental compositions are given in weight percent. Alloy V3 is an existing AA7075 alloy and is used for comparison purposes. Alloys V1, V2, V4, V5, V6, V7, V8, V9, V10, V11, and V12 were prototype alloys prepared according to the methods described herein.

[0098] Table 4

[0099] alloy Zn Cu Mg Fe Si Zr mn Cr Ti V1 8.03 2.07 1.68 0.13 0.07 0.10 0.04 0.03 0.003 V2 8.20 2.31 1.79 0.30 0.20 0.12 0.03 0.03 0.028 V3 5.43 1.47 2.48 0.19 0.09 0.003 0.02 0.17 0.005 V4 5.94 1.68 2.57 0.19 0.09 0.12 0.03 0.04 0.02 V5 6.77 2.18 2.45 0.10 0.09 0.12 0.03 0.04 0.004 V6 8.98 0.30 2.31 0.20 ...

Embodiment 2

[0119] Sheets prepared using warm water quenching in Example 1 were aged according to the conditions described below in Table 10 (ie, B1, B3, B4, B5, B6, B8, B10, B12, B14, and B16). Specifically, sheets prepared from alloys V1, V2, V3, V5, V11, and V12 were aged according to each of the conditions described for aging operations B1, B3, B4, B5, and B6 . Sheets prepared from alloys V4, V6, V7, V8, V9, and V10 were aged according to each of the conditions described for aging operations B8, B10, B12, B14, and B16. As described in Table 10, the sheet was heated from room temperature (about 25°C) to about 120°C at a rate of 16°C / hour. The sheet was then maintained at about 120°C for 6 hours. Sheets aged according to aging operations B4, B5, B6, B12, B14, and B16 were further heated from 120°C to 155°C at a rate of 11.7°C / hour. The sheet was maintained at about 155°C for the period of time indicated in Table 10 as "Second Soak Time". The sheet was then cooled to room temperature...

Embodiment 3

[0130] Sheets prepared from alloys V1 to V12 were aged by heating to a temperature of 125° C. for 24 hours. The resulting yield strength was measured and the results are shown in Table 13 below. For comparison purposes, the peak aged yield strengths are also listed in Table 13.

[0131] Table 13

[0132] Peak aging yield strength (MPa) Yield strength after aging treatment at 125°C for 24 hours (MPa) V1 518 520 V2 534 537 V3 457 434 V4 517 503 V5 541 513 V6 592 624 V7 409 420 V8 517 523 V9 549 540 V10 530 541 V11 542 535 V12 599 579

[0133] Strength data obtained after aging at 125°C for 24 hours ("125°C data") showed considerable variability compared to peak aged strength data. For example, the 125°C data for the V6 sample showed a significant increase in yield strength compared to the peak aged strength data. However, the 125°C data for the V5 sample showed a significant decrease in ...

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Abstract

High strength 7xxx aluminum alloys and methods of making the same. Described herein are novel 7xxx series aluminum alloys. The alloys exhibit high strength. The alloys can be used in a variety of applications, including automotive, transportation, electronics, aerospace, and industrial applications. Also described herein are methods of making and processing the alloys. Further described herein aremethods of producing a metal sheet, which include casting an aluminum alloy as described herein to form an ingot, homogenizing the ingot, hot rolling the ingot to produce a hot band, and cold rollingthe hot band to a metal sheet of final gauge.

Description

[0001] This application is a divisional application of the parent case with application number 201680016341.5. The filing date of the parent case is October 28, 2016; the title of the invention is "High Strength 7XXX Aluminum Alloy and Its Preparation Method". [0002] Cross References to Related Applications [0003] This application claims priority and benefit to U.S. Provisional Patent Application Serial No. 62 / 248,796, filed October 30, 2015, and U.S. Provisional Patent Application Serial No. 62 / 326,858, filed April 25, 2016, both U.S. Provisional Both patent applications are incorporated herein by reference in their entirety. technical field [0004] Novel aluminum alloy compositions and methods of making and processing the same are provided herein. The alloys described herein exhibit high strength and can be used in automotive, transportation, electronics, and industrial applications. Background technique [0005] High strength aluminum alloys are ideal for use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053
CPCC22C21/10C22F1/053C22F1/002C22C21/00B62D29/008B64C2001/0081B64C1/06B64C3/00B64C9/00B64D11/06
Inventor R.G.卡马特D.J.查克拉巴蒂R.R.莫汉娣R.V.库尔卡尼D.E.本津斯基J.蒂姆
Owner NOVELIS INC
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