Thermomechanical loading in pure torsion: Test control and deformation behavior

Charles E. Bakis, Michael G. Castelli, J. Rodney Ellis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Scopus citations


An investigation of thermomechanical testing and deformation behavior of tubular specimens under torsional loading is described. Experimental issues concerning test accuracy and control specific to thermomechanical loadings under a torsional regime are discussed. A series of shear strain-controlled tests involving the nickel-base superalloy Hastelloy X were performed with various temperature excursions and compared to similar thermomechanical uniaxial tests. The concept and use of second invariants of the deviatoric stress and strain tensors as a means of comparing uniaxial and torsional deformations is presented and critiqued for its applicability to the present data. The hardening behavior of the torsional specimens is also briefly presented and discussed in light of previous thermomechanical tests conducted under uniaxial conditions.

Original languageEnglish (US)
Title of host publicationASTM Special Technical Publication
PublisherPubl by ASTM
Number of pages21
ISBN (Print)0803118627
StatePublished - Jan 1 1993
EventProceedings of the Symposium on Multiaxial Fatigue - San Diego, CA, USA
Duration: Oct 14 1991Oct 16 1991

Publication series

NameASTM Special Technical Publication
ISSN (Print)0066-0558


OtherProceedings of the Symposium on Multiaxial Fatigue
CitySan Diego, CA, USA

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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