3D printed oxide reinforced titanium composites and methods

Patent metadata

Field	Value
Publication number	US-12208449-B2
Application number	US-202217736883-A
Country	US
Kind code	B2
Filing date	May 4, 2022
Priority date	May 4, 2021
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

This disclosure, and the exemplary embodiments provided herein, include AM processed Ti-MMCs reinforced with either aluminum oxide or tantalum pentoxide. According to an exemplary embodiment, composite feedstock powders of Ti-6Al-4V (Ti64) with 1% and 3% (by volume) reinforcements of either nano-Al 2 O 3 or Ta 2 O 5 are prepared by high energy ball milling and then 3-D printed using SLM.

First claim

What is claimed is:

1. A method of 3D printing oxide reinforced titanium composites comprising:
generating a composite powder by combining a titanium material and an oxide in ball mill, wherein the ball mill is used to perform multiple milling cycles at high energy, wherein each of the multiple milling cycles is at least one minute of milling followed by at least one minute of inactivity for cool-down, wherein the inactivity prevents melting of the composite powder;
retaining a spherical morphology, by the composite powder, of the titanium material, wherein each of the particles of the oxide are approximately from 1 μm to 20 μm;
configuring a custom support structure for supporting a metal component, wherein the custom support structure comprises large cylindrical support structures along an edge of a target print area of the metal component, wherein a diameter of each of the large cylindrical support structures is greater than or equal to 2 mm; and
printing, using a selective laser melting machine, the metal component and the custom support structure with the composite powder.

2. The method of claim 1 , wherein the oxide is 1% by volume of Al 2 O 3 , 3% Al 2 O 3 , 1% by volume of Ta 2 O 5 , or 3% Ta 2 O 5 , and the titanium material is Ti-6Al-4V.

3. The method of claim 1 , wherein the oxide is approximately 0.1% to 5% by volume of Al2O3 or Ta2O5.

4. The method of claim 1 , wherein the custom support structure includes a plurality of different diameter cylinders.

5. The method of claim 1 , the multiple milling cycles is at least ten milling cycles, and the selective laser melting machine is configured to have a target energy density that is low enough to ensure particulates of the oxide do not dissolve.

6. A method of 3D printing oxide reinforced titanium composites comprising:
generating a composite powder by combining a titanium material and an oxide in a ball mill, wherein the ball mill is used to perform multiple milling cycles at high energy, wherein each of the multiple milling cycles is approximately one to five minutes of milling followed by approximately one to ten minutes of inactivity for cool-down, wherein the inactivity prevents melting of the composite powder;
retaining a spherical morphology, by the composite powder, of the titanium material, wherein the oxide is a Ta2O5 oxide, wherein each of the particles of the oxide is approximately from 1 μm to 20 μm, and wherein poorer flowability results in a discontinuous powder bed;
configuring a custom support structure for supporting a metal component, wherein the custom support structure comprises large cylindrical support structures along an edge of a target print area of the metal component, wherein a diameter of each of the large cylindrical support structures is greater than or equal to 2 mm; and
printing, using a selective laser melting machine, the metal component and the custom support structure with the composite powder.

7. The method of claim 6 , wherein the oxide is 1% by volume of Ta2O5, or 3% Ta2O5.

8. The method of claim 6 , wherein the oxide is approximately 0.1% to 3% by volume of Ta2O5.

9. The method of claim 6 , wherein the titanium material is Ti-6Al-4V.

10. The method of claim 6 , the multiple milling cycles is at least ten milling cycles.

11. The method of claim 6 , wherein the selective laser melting machine is configured to have a target energy density that is low enough to ensure particulates of the oxide do not dissolve.

12. A method of 3D printing oxide reinforced titanium composites comprising:
generating a composite powder by combining a titanium material and an oxide in a ball mill, wherein the ball mill is used to perform multiple milling cycles at high energy, wherein each of the multiple milling cycles is approximately one to five minutes of milling followed by approximately one to ten minutes of inactivity for cool-down, wherein the inactivity prevents melting of the composite powder;
retaining a spherical morphology, by the composite powder, of the titanium material, wherein the oxide is a nano-Al2O3 oxide that when combined with the titanium material is less disruptive of the spherical morphology, wherein each of the particles of the oxide is approximately 1 μm to 20 μm, and wherein poorer flowability results in a discontinuous powder bed;
configuring a custom support structure for supporting a metal component, wherein the custom support structure comprises large cylindrical support structures along an edge of a target print area of the metal component, wherein a diameter of each of the large cylindrical support structures is greater than or equal to 2 mm; and
printing, using a selective laser melting machine, the metal component and the custom support structure with the composite powder.

13. The method of claim 12 , wherein the oxide is 1% by volume of Al2O3 or 3% Al2O3.

14. The method of claim 12 , wherein the oxide is approximately 0.1% to 3% by volume of Al2O3.

15. The method of claim 12 , wherein the titanium material is Ti-6Al-4V.

16. The method of claim 12 , the multiple milling cycles is at least ten milling cycles.

17. The method of claim 12 , wherein the selective laser melting machine is configured to have a target energy density that is low enough to ensure particulates of the oxide do not dissolve.

Assignees

• Us Navy
• Us Gov Sec Navy

Inventors

• Nieto Andy
• Reinhart Andrew James
• Ansell Troy Y
• Smith Walter

Classifications

• C22C32/0031

  Matrix based on refractory metals, W, Mo, Nb, Hf, Ta, Zr, Ti, V or alloys thereof · CPC title

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• B22F2302/253

  Aluminum oxide (Al2O3) · CPC title

• B22F2301/205

  Titanium, zirconium or hafnium · CPC title

• B22F2009/043

  by ball milling · CPC title