In this paper, effect of texture on cyclic-deformation behavior of
Zircaloy-4 has been investi gated. The results indicate
that (1) the alloy obeys the Coffin-Manson relation (bfNpeD= C), the
low-cycle fatigue life in the rolling direction is higher than that in the transverse direction at a given peD, and the life difference between both directions becomes larger with lowering the peD;(2)the alloy shows cyclic- deformation softening till fracture under low strain amplitude, showing cyclic-deformation hardening in the early stage and then cyclic-deformation softening till fracture under high strain amplitude, and the grains would rotate with the cyclic-deformation going on at a given amplitude where these grains have higher Schmid factor; (3)ssat half-life obeys the power law relation ss=snpsKe, and ibs obeys the logarithmic relation ibs=pbKeln+bC;(4) the cyclic-deformation behavior difference in both directions stems from the texture effect. Finally, the mechanism on texture effect has been discussed in detail.