Claims
- 1. A metallic fluid directing element for turbomachinery apparatus comprising:
- an airfoil having a cast alloy structure; and
- a base having a wrought alloy structure;
- the airfoil and base being joined at a friction welded joint characterized by a solid state, forged structure with a narrow heat affected zone.
- 2. The article of claim 1 in which the airfoil includes a hollow interior portion.
- 3. The article of claim 2 in which a liner insert is positioned within the hollow interior portion.
- 4. The article of claim 1 in which both the airfoil and the base are of a high temperature operating superalloy based on an element selected from the group consisting of Ni, Co and Fe.
- 5. The article of claim 4 in which the alloy of the airfoil and of the base are based on the same element.
- 6. The article of claim 5 in which the element is Ni.
Parent Case Info
This is a divisional application of application Ser. No. 209,596 filed Dec. 20, 1971 now U.S. Pat. No. 3,768,147 issued Oct. 30, 1973 and assigned to the assignee of the present invention.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1,426,849 |
Apr 1969 |
DT |
648,234 |
Jan 1951 |
UK |
Divisions (1)
|
Number |
Date |
Country |
Parent |
209596 |
Dec 1971 |
|