Nanostructured ferritic alloy components and related articles

Patent metadata

Field	Value
Publication number	US-2016312653-A1
Application number	US-201414565732-A
Country	US
Kind code	A1
Filing date	Dec 10, 2014
Priority date	Dec 10, 2014
Publication date	Oct 27, 2016
Grant date	—

Abstract

An article, for example a turbomachinery article is presented. The article includes a weldable first component having a base portion and a flange portion. The flange portion is outwardly projecting normal to a surface of the base portion; and is joined with the base portion by a solid state joint. The base portion comprises a nanostructured ferritic alloy; and the flange portion comprises a steel substantially free of oxide nanofeatures. The first component is joined to a second component through the flange portion of the first component by a weld joint.

First claim

1 . An article comprising:
a first component having a base portion and a flange portion outwardly projecting normal to a surface of the base portion, wherein the base portion comprises a nanostructured ferritic alloy and the flange portion comprises a steel substantially free of oxide nanofeatures, and wherein the flange portion is joined with the base portion by a solid state joint.

2 . The article of claim 1 , wherein the nanostructured ferritic alloy comprises a metal matrix and oxide nanofeatures dispersed within the metal matrix.

3 . The article of claim 2 , wherein the metal matrix comprises iron, chromium, cobalt, tungsten, molybdenum, titanium, or a combination thereof.

4 . The article of claim 2 , wherein the metal matrix comprises a steel selected from ferritic steel, martensitic steel, austenitic steel, duplex steel and precipitation hardened steel.

5 . The article of claim 2 , wherein the oxide nanofeatures comprises yttrium, zirconium, silicon, titanium, hafnium, or a combination thereof.

6 . The article of claim 2 , wherein the oxide nanofeatures comprises particles of a median size less than about 20 nanometers.

7 . The article of claim 1 , wherein the flange portion comprises ferritic steel, martensitic steel, austenitic steel, duplex steel or precipitation hardened steel.

8 . The article of claim 1 , wherein the first component comprises a turbomachinery component selected one or more of a shaft, a wheel, a spacer and an engine disk.

9 . The article of claim 1 , further comprising a second component that is joined with the flange portion of the first component by a weld joint.

10 . The article of claim 9 , wherein the second component comprises a metallic material.

11 . The article of claim 10 , wherein the metallic material comprises a steel, a nickel based superalloy, or a nanostructured ferritic alloy.

12 . The article of claim 9 , wherein the second component comprises a turbomachinery component selected one or more from a shaft, a wheel, a spacer and an engine disk.

13 . An article comprising:
a first component having a circular base portion extending from an inner periphery to an outer periphery, and a circular flange portion concentric to the circular base portion and is outwardly projecting normal to a surface between the inner periphery and the outer periphery of the circular base portion, wherein the circular base portion comprises a nanostructured ferritic alloy and the circular flange portion comprises a steel substantially free of oxide nanofeatures, and wherein the circular flange portion is joined with the circular base portion by a solid state joint.

Assignees

• Gen Electric

Inventors

• Didomizio Richard
• Knight Anne O'Dell
• Dial Laura Cerully
• Huang Shenyan
• Gigliotti Jr Michael Francis Xavier

Classifications

• C21D6/02 Primary

  Hardening by precipitation · CPC title

• B23K9/167

  and of a non-consumable electrode · CPC title

• F04D29/023

  especially adapted for elastic fluid pumps · CPC title

• B23K9/0282

  for welding tube sections · CPC title

• F01D5/02

  Blade-carrying members, e.g. rotors (rotors of non-bladed type F01D1/34; stators F01D9/00 {; selecting particular materials F01D5/28}) · CPC title