Fcc materials of aluminum, cobalt, nickel and titanium, and products made therefrom

Patent metadata

Field	Value
Publication number	US-2017306457-A1
Application number	US-201715492723-A
Country	US
Kind code	A1
Filing date	Apr 20, 2017
Priority date	Apr 20, 2016
Publication date	Oct 26, 2017
Grant date	—

Abstract

The present disclosure relates to new materials comprising Al, Co, Ni and Ti. The new materials may realize a single phase field of a face-centered cubic (fcc) solid solution structure immediately below the solidus temperature of the material. The new materials may include at least one precipitate phase and have a solvus temperature of at least 1100° C. The new materials may include 2.1-8.4 wt. % Al, 4.7-60.6 wt. % Co, 29.6-89.3 wt. % Ni, and 3.9-9.4 wt. % Ti. In one embodiment, the precipitate is selected from the group consisting of the L1 2 phase, the B2 phase, the Ni 3 Ti phase, and combinations thereof. The new alloys may realize improved high temperature properties.

First claim

What is claimed is:

1 . A composition of matter comprising:
2.1-8.4 wt. % Al; 4.6-89.6 wt. % Co; 4.6-89.6 wt. % Ni; 3.7-9.7 wt. % Ti; and the balance being any optional incidental elements and impurities.

2 . The composition of matter of claim 1 , wherein the incidental elements comprise up to 0.15 wt. % C, up to 0.15 wt. % B, up to 0.5 wt. % Hf and up to 0.5 wt. % Zr.

3 . The composition of matter of claim 1 , wherein the composition of matter comprises 4.7-60.6 wt. % Co, 29.6-89.3 wt. % Ni, and 3.9-9.4 wt. % Ti.

4 . The composition of matter of claim 3 , wherein the composition of matter comprises 2.1-5.4 wt. % Al, 4.7-41.3 wt. % Co, and 47.9-89.3 wt. % Ni.

5 . The composition of matter of claim 4 , wherein the composition of matter comprises 4.7-28.9 wt. % Co, and 56.5-89.3 wt. % Ni.

6 . The composition of matter of claim 1 , wherein the composition of matter comprises 2.4-7.6 wt. % Al, 5.2-55.1 wt. % Co, 32.9-88.1 wt. % Ni, and 4.3-8.6 wt. % Ti.

7 . The composition of matter of claim 6 , wherein the composition of matter comprises 2.4-4.9 wt. % Al, 5.2-37.5% Co, and 53.3-88.1 wt. % Ni.

8 . The composition of matter of claim 7 , wherein the composition of matter comprises 5.2-26.3% Co, and 62.7-85.4 wt. % Ni.

9 . An alloy body comprising:
2.1-8.4 wt. % Al; 4.6-89.6 wt. % Co; 4.6-89.6 wt. % Ni; and 3.7-9.7 wt. % Ti; the balance being any optional incidental elements and impurities

10 . The alloy body of claim 9 , wherein the alloy body is in the form of an aerospace or automotive component.

11 . The aerospace component of claim 10 , wherein the aerospace or automotive component is a turbine.

12 . A method comprising:
(a) using a feedstock in an additive manufacturing apparatus, wherein the feedstock comprises: 2.1-8.4 wt. % Al; 4.6-89.6 wt. % Co; 4.6-89.6 wt. % Ni; and 3.7-9.7 wt. % Ti; (b) producing a metal product in the additive manufacturing apparatus using the feedstock.

13 . The method of claim 12 , wherein the feedstock comprises a powder feedstock, wherein the method comprises:
(a) dispersing a metal powder of the powder feedstock in a bed and/or spraying a metal powder of the powder feedstock towards or on a substrate; (b) selectively heating a portion of the metal powder above its liquidus temperature, thereby forming a molten pool; (c) cooling the molten pool, thereby forming a portion of the metal product, wherein the cooling comprises cooling at a cooling rate of at least 100° C. per second; and (d) repeating steps (a)-(c) until the metal product is completed, wherein the metal product comprises a metal matrix, wherein the Al, Co, Ni, and Ti make-up the matrix.

14 . The method of claim 12 , wherein the feedstock comprises a wire feedstock, wherein the method comprises:
(a) using a radiation source to heat the wire feedstock above its liquidus point, thereby creating a molten pool, wherein the molten pool comprises Al, Co, Ni, and Ti; (b) cooling the molten pool at a cooling rate of at least 1000° C. per second; and (c) repeating steps (a)-(b) until the metal product is completed, wherein the metal product comprises a metal matrix, wherein the Al, Co, Ni, and Ti make-up the matrix.

15 . The method of claim 12 , comprising: cooling at a rate sufficient to form at least one precipitate phase.

16 . The method of claim 15 , wherein the at least one precipitate phase comprises at least one of L1 2 , Ni 3 Ti, and B2.

17 . The method of claim 16 , wherein the metal product comprises at least 0.5 vol. % of the precipitate phase.

18 . The method of claim 12 , comprising:
working the metal product.

19 . The method of claim 18 , wherein the producing step comprises:
first producing a portion of the metal product using the feedstock; second producing another portion of the metal product using the feedstock; wherein the working occurs at least after the first or second producing steps.

20 . The method of claim 19 , wherein the working occurs between the first producing step and the second producing step.

Assignees

• Arconic Inc

Inventors

• Lin Jen
• Yan Xinyan

Classifications

• B22F12/13

  to preheat the material · CPC title

• B22F12/20

  Cooling means · CPC title

• B22F12/53

  Nozzles · CPC title

• B22F10/25

  Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] · CPC title

• B22F10/50

  Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up · CPC title