Method for manufacturing an aluminium alloy part by additive manufacturing and aluminium alloy part obtained according to the method

Patent metadata

Field	Value
Publication number	US-12246379-B2
Application number	US-202017595164-A
Country	US
Kind code	B2
Filing date	Apr 30, 2020
Priority date	May 13, 2019
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A method for manufacturing an aluminium alloy part by additive manufacturing comprising a step during which a layer of a mixture of powders is melted locally and then solidified, wherein the mixture of powders comprises: —first particles—comprising at least 80 wt % of aluminium and up to 20 wt % of one or more additional elements, and —second particles—of yttria, the volume percentage of second particles in the mixture of powders preferably ranging from 0.5% to 5%.

First claim

What is claimed is:

1. A method for manufacturing an aluminium alloy part by additive manufacturing, comprising a step during which a layer of a mixture of powders is locally melted and then solidified, wherein the mixture of powder comprises:
first particles comprising at least 80% by mass aluminium and up to 20% by mass one or more additional elements, and
second particles of yttrium oxide.

2. The method according to claim 1 , wherein the percentage by volume of second particles in the mixture of powders ranges from 0.5% to 5%.

3. The method according to claim 1 , wherein the second particles have a largest dimension ranging from 5 nm to 2 μm.

4. The method according to claim 1 , wherein the second particles have a largest dimension ranging from 30 nm to 50 nm.

5. The method according to claim 1 , wherein the percentage by volume of second particles in the mixture of powders ranges from 1% to 3%.

6. The method according to claim 1 , wherein the first particles have a largest dimension ranging from 10 μm to 100 μm.

7. The method according to claim 1 , wherein the first particles have a largest dimension ranging from 20 to 65 μm.

8. The method according to claim 1 , wherein the additional elements are selected from Cu, Si, Zn, Mg, Fe, Ti, Mn, Zr, Va, Ni, Pb, Bi and Cr.

9. The method according to claim 1 , wherein the aluminium alloy is the 7075 alloy, the 2024 alloy, the 2219 alloy or the 6061 alloy.

10. The method according to claim 1 , wherein the manufacturing method is a laser selective melting method.

11. The method according to claim 1 , wherein the manufacturing method is an electron beam selective melting method.

12. The method according to claim 1 , wherein the powder mixture is produced in a 3D dynamic mixer or by mechanosynthesis.

13. An aluminium alloy particle obtained according to the method as defined in claim 1 , wherein it comprises yttrium.

14. A part according to claim 13 , wherein the part is a heat exchanger.

Assignees

• Commissariat Energie Atomique

Inventors

• Opprecht Mathieu
• Garandet Jean-Paul
• Lomello Fernando
• Roux Guilhem
• Soulier Mathieu

Classifications

• C22C32/0036

  Matrix based on Al, Mg, Be or alloys thereof · CPC title

• B22F10/64

  by thermal means (control of energy beam parameters for post heating B22F10/364) · CPC title

• B22F10/36

  of energy beam parameters · CPC title

• B22F10/34

  of powder characteristics, e.g. density, oxidation or flowability · CPC title

• B23K15/0086

  welding for purposes other than joining, e.g. build-up welding · CPC title