A resistance strain gage with repeatable and cancellable apparent strain for use to 1500 FA temperature compensated static strain gauge, which is fabricated from Pd13Cr alloy and a Pt compensator, is being developed and has been tested over a temperature range to 1500 F at NASA-Lewis. The PdCr compensated strain gage has significantly lower apparent strain to 500 F than other high temperature strain gages. The PdCr compensated gage is protected from oxidation by a flame-sprayed alumina-4 wt pct zirconia overcoating. Test Results to 1500 F indicate apparent strain variations of less than 250 micro-epsilon and reproducibility between thermal cycles within 50 micro-epsilon. The apparent strain of the coated PdCr compensated gage can be predicted and cancelled due to its reproducibility and low value.
Document ID
19910067307
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lei, Jih-Fen (NASA Lewis Research Center; Sverdrup Technology, Inc. Cleveland, OH, United States)