Composite filler wire welds together an assembly made from components of Rene 41 nickel base alloy. Using equal parts of Rene 41 and Hastelloy W weld wire in the filler reduces the cracking and weaknesses of the individual parent metals

Grimaldo, S.

English

NASA Technical Reports Server

May 1967	 Brief 67-10107 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
-	 ....	 .•j ..::
	 ________ 
Composite Weld Rod Corrects Individual Filler Weaknesses 
The problem: 
To weld together an assembly fabricated from com-
ponents of Rene 41 nickel base alloy. Wire of the 
parent metal proved unsatisfactory due to extreme 
cracking problems. Hastelloy W filler wire, while 
demonstrating virtually complete freedom from weld 
cracking, did not respond to heat treatment and did 
not possess the strength of the parent metal. 
The solution: 
A composite filler of equal parts Rene 41 weld wire. 
and Hastelloy W weld wire. 
How it's done: 
One 36-inch length of 0.030-inch Hastelloy W weld 
wire and one 36-inch length of 0.030-inch Rene 41 
weld wire are combined by weaving them together and 
the composite is fed to the workpiece to simultane-
ously form the weld puddle. 
Notes: 
1. The wetting and flow characteristics of this com-
posite filler proved superior to those of Hastelloy W.
2. In tensile tests to destruction, failure occurred 
within the weld fusion zone at all elevated tempera-
tures. At room temperature, failure occurred both 
within the weld fusion zone and at the weld fusion 
zone—weld heat affected zone interface. Examina-
tion of the fractures revealed no defects. 
3. Inquiries concerning this invention may be di-
rected to:
Technology Utilization Officer 
Marshal Space Flight Center 
Huntsville, Alabama 35812 
Reference: B67-10107 
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be made to NASA, Code 
GP, Washington, D.C. 20546.
Source: S. Grimaldo 
of North American Aviation, Inc.

under contract to

Marshall Space Flight Center
(M-FS-1923) 
Category 05 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19670000107 2020-03-11T20:46:54+00:00Z


Composite weld rod corrects individual filler weaknesses

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