Damage-tolerant aluminum materials with layered microstructures

A technique for casting aluminum, aluminum alloys, applied to the preparation of damage-tolerant wrought aluminum materials having a grain composition with 2 regions, the alloy comprising the following components based on weight %: up to 0.6, the aluminum material is prepared In the field, it can solve the problem of not being able to produce high damage tolerance materials

Active Publication Date: 2017-03-08
SAP AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, high damage tolerant materials cannot be produced

Method used

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  • Damage-tolerant aluminum materials with layered microstructures
  • Damage-tolerant aluminum materials with layered microstructures
  • Damage-tolerant aluminum materials with layered microstructures

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Experimental program
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Embodiment

[0060] Table 1 lists the chemical composition in weight percent of some comparative materials (alloys C, E, F, G) and alloys within the scope of the invention (alloys A, B, D). All these aluminum alloys were DC cast to evaluate the effect of composition and casting speed on the development of peritectic components.

[0061] Table 2 lists the alloys and casting speeds of some comparative variants and variants which lead to a cast structure with a peritectic composition of more than 20% according to the invention (variants A2, A3 and B2, B3).

[0062] Cast bodies with a diameter of 254 mm and a peritectic composition of more than 20% (variants A2, B2 and D) and comparative materials (alloys C, E-G) were processed by the following steps:

[0063] Homogenize at 545°C;

[0064] air cooling;

[0065] Preheat to about 460°C;

[0066] Extrude into a box profile with a 2-hole die;

[0067] Press quenching with water;

[0068] Aged with different grains.

[0069] Comparing alloys ...

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Abstract

The invention discloses a wrought aluminum material which improves the damage tolerance while retaining the high strength of the material. Furthermore, the present invention discloses a precipitation hardenable aluminum alloy cast aluminum material comprising grains having two distinct regions, a first central region rich in elements capable of peritectic reactions with aluminum and a surrounding first region The second region is rich in elements capable of eutectic reaction with aluminum.

Description

[0001] The present invention relates to damage tolerant aluminum materials having a layered microstructure and precipitation hardenable aluminum alloys suitable for the preparation of the aluminum materials, and methods of making the aluminum materials. [0002] Background of the invention [0003] The present invention relates to the preparation of aluminum materials, in particular the preparation of damage tolerant wrought aluminum materials. [0004] It is known from the prior art that for conventionally produced aluminum materials, strength, ductility and damage tolerance are generally inversely correlated, ie increasing tensile strength generally degrades ductility and damage tolerance. [0005] In the method previously disclosed in EP1987170 an alloy was used comprising the following components on a weight % basis: Mn up to 0.6, Cr up to 0.3, Zr up to 0.25, Mg 0.25-1.2, Si 0.3-1.4, Ti 0.1 -0.4, where Ti exists as a solid solution and contains incidental impurities, includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/08C22F1/04C22F1/05
CPCB32B15/016B32B15/20C22C21/00C22C21/02C22C21/08C22C21/14C22C21/16C22F1/04C22F1/043C22F1/047C22F1/05C22F1/057C21D2211/004Y10T29/49B22D25/06
Inventor S·扎亚克J·布拉姆
Owner SAP AG
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