SEDL / STP / STP551-EB / STP32105S

Dual Analysis of Longitudinal and Transverse Zirconium Tensile Stress-Strain Data

Garde, AM
Graduate student and professor, University of Florida, Gainesville, Fla.

Reed-Hill, RE
Graduate student and professor, University of Florida, Gainesville, Fla.

Pages: 17    Published: Jan 1974

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Abstract

An analysis of zirconium tensile stress-strain data was made by the Crussard and Jaoul method and an analogous method based on the Swift equation ϵ^p = ϵ^po + cσ^m. Data from transverse and longitudinal specimens from 4 to 813 K were considered. Also investigated were the effects of a small 77 K prestrain on the 300 K deformation behavior, and the effect of composition on the deformation at an intermediate temperature (≅575 K). The two analyses revealed the same basic deformation stages in all specimens. Transverse and longitudinal specimens exhibited, in general, a different pattern of stages. At elevated temperatures (above 550 to 600 K) pure zirconium tends to exhibit single-stage behavior. Specimens in which kinking or twinning are significant factors showed multi-stage behavior. The basic pure zirconium stress-strain curve is one in which the stress-strain curve slope decreases rapidly with increasing stress.