Grain-Growth and Recrystallization Characteristics of Zirconium

Grain Growth Kinetics in Ti–C Alloys

“…The actual values of the exponent, n, in eq. (7) have been reported to be 1/3 for the grain growth of 99% cold-rolled titanium in Hammond(8), 1/2 for the isothermal annealing of several grades of unalloyed titanium by Jones et al (9), 1/3 for the isothermal annealing of iodide titanium Cline(10), and 1/3 for the grain growth in unalloyed zirconium by Dunkerley et al (11) Detailed experiments on the grain growth kinetics in unalloyed titanium with a range of interstitial impurity content represented by the zone-refined MARZ grade, Battelle, A-50 and A-70(1) and in a series of Ti-N alloys (2) and Ti-O alloys (3) have shown that the grain growth always obey the t1/3 law, the growth rate (dD/dt) being proportional to the reciprocal of square of the grain size. The t1/3 law has been considered to be due to a combined effect of smallgrain disappearance and impurity dragging which reduces the grain growth rate.…”

Rolling and recrystallization behavior of pure zirconium and zircaloy-4

“…The derivative curve of Zry-4 is narrower in comparison with pure Zr and its minimum, i.e., the maximum softening rate, is shifted to higher temperatures by about 60°C. The higher resistance to recrystallization found in the alloy is not surprising and can be deduced from the results of literature by comparing existing studies for pure zirconium [8][9][10] with those on zircaloy-4 [11,12,13,14,15]. On the other hand, a more precise comparison between the two materials was not possible from the literature analysis, since the initial microstructures and the deformation and annealing parameters used in those works were very dissimilar.…”

“…There is extensive literature regarding plastic deformation, annealing behavior and crystallographic texture evolution of pure zirconium [8,9,10] and zircaloy-4 [11,12,13,14,15] published independently. However, comparative studies of both materials are scarce.…”

Archives of Metallurgy and Materials

“…Zhang Y et al [9] have studied the effect of strain rate and temperature on Cu-Cr-Zr alloy on the basis of simulations and experiments. dunkerley et al [10] determined the understanding of work-hardening and recrystallization is not only fundamental to the accomplishment of mechanical forming yet in addition essential to improving the microstructure and properties of the products. the distinct strain hardening phenomenon occurs under relatively lower temperatures.…”