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Development of a load cell for mechanical testing in hydrogen

Author
McCabe, L. P.
Published
United States : [publisher not identified], 1982
Springfield, Va.: National Technical Information Service, [approximately 1982]
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
Mechanical testing in hydrogen environments is performed on materials to determine hydrogen compatibility. Many tests are performed on small test samples in pressure vessels where monitoring of actual sample load is difficult. A method was developed to monitor small samples by placing inside the vessel a miniature load cell which is capable of measuring loads of less than 100 lbs. The load cell monitors load by means of a Wheatstone Bridge circuit composed of four strain gages. Two of the gages are mounted on a stainless steel stub which becomes part of the vessel load string; the others are wired outside the pressure vessel. Previously, load cells have been short-lived because of hydrogen diffusion into the epoxy-phenolic adhesive used to attach the strain gages to the stub. The use of a flame-sprayed ceramic, however, rather than an organic epoxy to mount the strain gages appears to produce a load cell resistant to the hydrogen test environment.
Report Numbers
DE83012087; DP-MS-82-53; CONF-821038-9
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC09-76SR00001
OSTI Identifier 6316116
Research organization: Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
View MARC record | catkey: 47331776