Wrought aluminum alloys provide high-strength substitute in the damaged area of aluminum castings. The segment can either be welded to the cast alloy or built in with a heat-treatable welding rod

Strangeland, M. L.

Zuech, R. A.

English

NASA Technical Reports Server

April 1970	 Brief 70-10121 
NASA TECH BRIEF 
NASA Tech Briefs announce new technology derived from the U .S. space program. They are issued to encourage commercial 
application. Tech Briefs are available on a subscription basis from the Clearinghouse for Federal Scientific and Technical 
Information, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Division, NASA, Code UT, Washington, D.C. 20546. 
A Method for Obtaining High Ductility in Critical Areas of Aluminum Castings 
During proof-pressure testing of aluminum castings, 
cracks have appeared in areas where the wall thick-
ness did not meet minimum requirements. The dis-
crepancy in wall thickness is clearly shown in the 
illustration. It is thought that the variations occur 
during closing of the mold. A method has been de-
veloped for salvaging the material and reducing costs. 
Wrought aluminum alloys are more ductile than 
cast aluminum alloys and provide a desirable, high-
strength substitute in the damaged area. The brittle 
area is removed by machining and replaced by an 
identical section machined from wrought aluminum. 
The wrought segment can be either welded to the 
cast allo y in the conventional manner, or built in with
a heat-treatable welding rod. After this operation, 
the entire casting is heat treated again to the required 
condition. 
Notes: 
1. This information should be of interest to personnel 
in the aircraft, transportation, petroleum, and 
chemical industries. 
2. Requests for further information may be directed 
to:
Technology Utilization Officer 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B70-10121
Ill inued oerieaf) 
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=19700000117 2020-03-17T00:26:09+00:00Z
Patent status:	 - 
No patent action is contemplated by NASA. 
Source: LZomeo A. Zuech and 
Mayward L. Strangeland of 
North American Rockwell Corp. 
under contract to 
Marshall Space Flight Center 
(MFS- 18705)
[I 
. 
. 
Brief 70-10121	 Category 08


A method for obtaining high ductility in critical areas of aluminum castings

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