Unlock instant, AI-driven research and patent intelligence for your innovation.

Improved 7xxx aluminum alloys

An aluminum alloy and alloy technology, applied in the field of 7xxx aluminum alloys and products made of them, can solve problems such as improving forging aluminum alloys

Pending Publication Date: 2021-06-22
ARCINIC INC
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to improve one property of aluminum alloy without reducing another property
For example, it is difficult to increase the strength of wrought aluminum alloys without affecting other properties such as fracture toughness or corrosion resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Improved 7xxx aluminum alloys
  • Improved 7xxx aluminum alloys
  • Improved 7xxx aluminum alloys

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0085] Multiple 7xxx aluminum alloy compositions were cast into rectangular ingots with a thickness of 2.875 inches: the new invention alloy with silver as well as two conventional 7050 alloys and two conventional 7085 alloys. The composition of the alloy is provided in Table 1 below.

[0086] Table 1 - Composition (% by weight) of the alloy of Example 1

[0087]

[0088] *Each alloy contained 0.02-0.03% by weight of Ti as an incidental element; for each alloy, none of the impurities exceeded 0.05% by weight, and the total amount of impurities did not exceed 0.15% by weight.

[0089]After casting, the ingot was homogenized, scraped smooth, and then hot rolled into slabs. The final gauge of the board was about 1.125 inches (28.575 mm). The plates were then planarized, then solution heat treated, and then quenched in 195°F water. The 195°F water quench simulates the quench conditions for thicker plate (eg, plate with a final gauge thickness of about 8-12 inches). After ...

example 2

[0099] Seven additional 7xxx aluminum alloys were cast as ingots (6 inches thick (152.4 mm)), the compositions of which are shown in Table 4 below.

[0100] Table 4 - Composition (% by weight) of Example 2 alloy**

[0101]

[0102] *Each alloy contained 0.02-0.03% by weight of Ti as an incidental element; for each alloy, none of the impurities exceeded 0.05% by weight, and the total amount of impurities did not exceed 0.15% by weight.

[0103] **Alloys 3 and 5 also contain about 0.25 wt% Mn.

[0104] After smoothing and homogenization, the ingots were hot rolled to a final gauge of approximately 1.75 inches (44.45 mm). The alloy was then solution heat treated and then quenched in hot water (190°F / 87.8°C), which simulated a plate approximately 8-12 inches (20.32-30.48 cm) thick. After quenching, the plates are stretched and then artificially aged to the various styles in the T7 temper. The mechanical properties of the panels were then evaluated. Strength and elongation...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile yield strengthaaaaaaaaaa
tensile yield strengthaaaaaaaaaa
tensile yield strengthaaaaaaaaaa
Login to View More

Abstract

New 7xxx aluminum alloys are disclosed. The new 7xxx aluminum alloys generally include from 0.05 to 1.0 wt. % Ag. In one approach, a new 7xxx aluminum alloy includes from 0.05 to 1.0 wt. % Ag, from 5.5 to 9.0 wt. % Zn, from 1.2 to 2.6 wt. % Cu, from 1.3 to 2.5 wt. % Mg, up to 0.60 wt. % Mn, up to 1.0 wt. % of at least one grain structure control material, wherein the at least one grain structure control material is selected from the group consisting of Zr, Cr, V, Hf, other rare earth elements, and combinations thereof, up to 0.30 wt. % Fe, up to 0.30 wt. % Si, up to 0.15 wt. % Ti, not greater than 0.08 wt. % Sc, and not greater than 0.05 wt. % Li, the balance being aluminum, optional incidental elements and impurities.

Description

technical field [0001] This patent application relates to improved 7xxx aluminum alloys and products made therefrom. Background technique [0002] Aluminum alloys can be used in a variety of applications. However, it is difficult to improve one property of aluminum alloys without degrading another property. For example, it is difficult to increase the strength of wrought aluminum alloys without affecting other properties such as fracture toughness or corrosion resistance. 7xxx (Al-Zn-Mg based) are prone to corrosion. See, e.g., Bonn, W. Gruhl, "The stresscorrosion behavior of high strength AIZnMg alloys", paper presented at the International Meeting of Associazione Italiana di Metallurgie, "Aluminum Alloys in Aircraft Industries", Turin, October 1976. [0003] The patent owner has described some 7xxx aluminum alloy products, inter alia, in US Patent Nos. 6,972,110 and 8,673,209 and International Patent Application Publication Nos. WO2016 / 183030 and WO2018 / 237196. Conte...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053
CPCC22C21/10C22F1/053
Inventor S·坎比尔J·博塞利J·C·林L·M·卡拉宾F·S·博瓦德张文平
Owner ARCINIC INC