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Damage-tolerant aluminum material with layered microstructure

A technique for casting aluminum, forging aluminum, applied to the alloy including the following components based on weight %: up to 0.6, preparing the aluminum material, containing a grain composition with 2 regions, preparation of damage-tolerant wrought aluminum material It can solve problems such as the inability to produce high damage tolerance materials

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

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Problems solved by technology

Therefore, high damage tolerant materials cannot be produced

Method used

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  • Damage-tolerant aluminum material with layered microstructure
  • Damage-tolerant aluminum material with layered microstructure
  • Damage-tolerant aluminum material with layered microstructure

Examples

Experimental program
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Embodiment

[0061] 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.

[0062] 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).

[0063] 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:

[0064] Homogenize at 545°C;

[0065] air cooling;

[0066] Preheat to about 460°C;

[0067] Extrude into a box profile with a 2-hole die;

[0068] Press quenching with water;

[0069] Aged with different grains.

[0070] Comparing alloys ...

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Abstract

The invention discloses a forged aluminum material capable of improving the damage tolerance while retaining the high material strength, and further discloses a precipitation hardenable aluminum-alloy cast aluminum material which comprises two obvious areas of crystal grains, wherein the first area is positioned at the center and rich in at least one element capable of reacting with aluminum in a peritectic manner; and the second area is positioned around the first area and rich in at least one element capable of reacting with aluminum in an eutectic manner.

Description

[0001] This application is a divisional application of Application No. 201080066466.1 filed on April 26, 2010, entitled "Damage Tolerant Aluminum Material with Layered Microstructure". [0002] 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. [0003] Background of the invention [0004] The present invention relates to the preparation of aluminum materials, in particular the preparation of damage tolerant wrought aluminum materials. [0005] 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. [0006] In the method previously disclosed in EP1987170 an alloy was used comprising the following comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C21/16C22C21/00C22F1/043C22F1/047C22F1/05C22F1/057C22F1/04B32B15/00B32B15/20
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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