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

Patent metadata

Field	Value
Publication number	US-2017306460-A1
Application number	US-201715493031-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, Cr, and Ni. 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 1000° C. The new materials may include 2.2-8.6 wt. % Al, 4.9-65.0 wt. % Co, 4.3-42.0 wt. % Cr, and 4.8-88.6 wt. % Ni. In one embodiment, the precipitate is selected from the group consisting of the L1 2 phase, the B2 phase, the sigma phase, the bcc 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:
2.2-8.6 wt. % Al; 4.9-65.0 wt. % Co; 4.3-42.0 wt. % Cr; and 4.8-88.6 wt. % Ni; 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 includes 2.4-7.8 wt. % Al, 5.5-59.1 wt. % Co, 4.8-38.2 wt. % Cr, and 5.3-82.2 wt. % Ni.

4 . The composition of matter of claim 1 , wherein the composition of matter includes 6.7-8.5 wt. % Al, 4.9-24.4 wt. % Co, 4.3-16.2 wt. % Cr, and 54.4-84.1 wt. % Ni.

5 . The composition of matter of claim 1 , wherein the composition of matter includes 6.8-8.5 wt. % Al, 4.9-24.4 wt. % Co, 8.7-16.2 wt. % Cr, and 54.4-79.6 wt. % Ni.

6 . The composition of matter of claim 5 , wherein the composition of matter includes 5.0-12.3 wt. % Co, 13.2-16.2 wt. % Cr, and 59.8-75.0 wt. % Ni.

7 . The composition of matter of claim 1 , wherein the composition of matter includes 7.5-7.7 wt. % Al, 5.5-22.2 wt. % Co, 4.8-14.8 wt. % Cr, and 60.5-82.2 wt. % Ni.

8 . The composition of matter of claim 7 , wherein the composition of matter includes 9.7-14.8 wt. % Cr, and 60.5-77.3 wt. % Ni.

9 . The composition of matter of claim 7 , wherein the composition of matter includes 5.5-11.2 wt. % Co, 14.6-14.8 wt. % Cr, and 66.5-72.4 wt. % Ni.

10 . An alloy body comprising:
2.2-8.6 wt. % Al; 4.9-65.0 wt. % Co; 4.3-42.0 wt. % Cr; and 4.8-88.6 wt. % Ni; the balance being any optional incidental elements and impurities.

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

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

13 . A method comprising:
(a) using a feedstock in an additive manufacturing apparatus, wherein the feedstock comprises: 2.2-8.6 wt. % Al; 4.9-65.0 wt. % Co; 4.3-42.0 wt. % Cr; and 4.8-88.6 wt. % Ni; (b) producing a metal product in the additive manufacturing apparatus using the feedstock.

14 . The method of claim 13 , 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, Cr, and Ni make-up the matrix.

15 . The method of claim 13 , 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 , B2, bcc and sigma.

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 13 , 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

• B22F12/53

  Nozzles · CPC title

• B22F10/50

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

• B22F12/13

  to preheat the material · CPC title

• B22F10/64

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

• B22F12/20

  Cooling means · CPC title