# US 10,501,825 B2 · Custom titanium alloy for 3-D printing and method of making same

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- Number: US 10,501,825 B2
- Document ID: US10501825B2
- Status: Granted
- Kind: B2
- Application number: 15/587,584
- Filed: 2017-05-05
- Published: 2017-11-23
- Granted: 2019-12-10
- Earliest claimed: 2016-05-18
- Assignees: Carpenter Technology Corporation
- Applicants: Charles Frederick Yolton
- Inventors: Charles Frederick Yolton
- Web page: https://patentgrep.com/patent/US10501825B2

## CPC

- C22C 1/0458: {Alloys based on titanium, zirconium or hafnium}
- B22F 1/0003
- B22F 3/1055
- B33Y 70/00: Materials specially adapted for additive manufacturing
- C22C 1/02: by melting {(C22C1/1036 takes precedence)}
- C22C 14/00: Alloys based on titanium
- B22F 2301/205: Titanium, zirconium or hafnium
- Y02P 10/295
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A Ti-6A1-4V titanium powder alloy composition having enhanced strength resulting from the addition of one or more of the following elements without requiring an increase in oxygen content: Aluminum Iron Nitrogen Carbon The composition may also be used for Ti-6A1-4V titanium alloy starting bar stock.

## Claims

### Claim 1

A method of increasing the strength of Ti-6A1-4V titanium alloy powder or starting bar stock without increasing oxygen content, comprising adding to the powder or starting bar stock the following combination of elements:
Aluminum
Iron
Nitrogen
Carbon.

### Claim 2 (depends on 1)

The method of claim 1 wherein the weight percent of the elements for the powder is:
Aluminum—6.3 to 6.7%
Iron—0.25 to 0.4%
Nitrogen—0.02 to 0.05%
Carbon—0.04 to 0.08%.

### Claim 3 (depends on 1)

The method of claim 1 wherein the weight percent of the elements for the bar stock is:
Aluminum—6.3% to 6.7%
Iron—0.15% to 0.30%
Nitrogen—0.02% to 0.05%
Carbon—0.04% to 0.08%.