Closure to “Discussion of ‘Heat Resistance of Zirconium in Several Mediums’ [E. T. Hayes, A. H. Roberson, and R. H. Robertson (pp. 316–323)]”

Abstract

not Available.

Experimental partial phase diagram of the Zr–Sn–Fe system

“…Tanner and Levinson [1] in 1960 studied the Zr-SnFe phase diagram in the region located between the Zr corner, the compound Zr 4 Sn and the compound ZrFe 2 , between 200°C and 1100°C. They did not recognize the presence of the Zr 3 Fe and Zr 2 Fe intermetallics in the ternary diagrams that they reported (they were based on a binary Zr-Fe diagram established in 1951 by Hayes et al [2] which did not show those two compounds). Tanner and Levinson [1] reported the existence of a ternary phase (they called it h-phase) with composition: Zr (68.6%)-Sn (19.0%)-Fe (12.4%) in at.%.…”

Thermodynamic properties and phase equilibria in the nickel–zirconium system. The liquid to amorphous state transition

“…12 are plotted in Fig. 10 and compared with the experimental data [44][45][46][47][48][49] in Table 1. According to 12 the solidus temperatures are known with an uncertainty of AE10 K, while the liquidus ones are of somewhat lower precision.…”

“…One can see good agreement between the present calculations with both the reference data 12 and the results of physical and chemical analyses. [44][45][46][47][48][49] The only discrepancy with the recommendations 12 is observed in the eutectic reaction L $ NiZr 2 + NiZr co-ordinates. Similar disagreement was found in ref.…”

Effect of alloying elements (Cu, Fe, and Nb) on the creep properties of Zr alloys

“…Although, the diffusivity of the alloying element in the alpha zirconium was not studied in this work, it is known that niobium has the lowest diffusion rate among the added alloying elements and that iron has a lower diffusion rate than copper in zirconium from previous studies [13,14]. Also, from a study for the solubility limit of an alloying element such as copper [11], iron [12] and niobium [15], it is known that the niobium solubility limit is much higher than the copper or iron solubility limits in alpha zirconium. Therefore, it could be assumed that both factors of a diffusivity and a soluble amount of the alloying elements would control the creep strength of the zirconiumbased alloys.…”

“…Effect of an alloying element on the creep behavior Generally, the creep behavior is affected by certain parameters such as the chemical composition, microstructural characteristics of the grain size, dislocation density and the precipitates. Due to the very low solubility of copper [11] and iron [12] in zirconium at a low temperature, it was impossible to study the solute range effect of both elements in this study. Therefore, the creep behavior in this work would be affected by the solid solution as well as the precipitates which would be determined by the type of alloying elements and the amount of alloying elements.…”