Effect of diffusive Nb redistribution on the pitting susceptibility of U-5.5Nb alloys
Source abstract
Abstract
Abstract The influence of diffusive Nb redistribution on the microstructure and Volta potential of U-5.5Nb alloys thermally aged at 400 °C for durations between 1 h and 100 h was investigated and their surfaces were examined post-corrosion using various microscopy techniques. The results demonstrated that Nb-depleted lamellae resulting from Nb redistribution have the lowest Volta potential in the microstructure and are extremely sensitive to pitting, as demonstrated by immersion experiments and potentiometric polarization tests. However, the pitting potential of the aged alloys (205.2 ± 3.9 mV) did not change with the content of Nb-depleted lamellae.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nuclear Materials and Properties · Fusion materials and technologies · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
Show source-provided references
1. The effect of quench rate on the microstructure, mechanical properties, and corrosion behavior of U-6 wt pct Nb10.1007/BF02648560 ↗
2. Galvanic corrosion behavior of depleted uranium in synthetic seawater coupled to aluminum, magnesium, and mild steel10.5006/1.3583968 ↗
3. Auger electron spectroscopic study of the surface oxidation of uranium–niobium alloy {U–6wt.% Nb} in a UHV environment containing primarily H2, H2O and CO10.1016/j.susc.2007.05.032 ↗
4. Uranium and U–Zr and U–Ru alloy corrosion rates in the transpassive state10.1016/j.jallcom.2007.06.078 ↗
5. Effect of alloyed Ti on the microstructure and corrosion characteristics of a U–Ti alloy in a hydrogen environment10.1016/j.corsci.2015.01.005 ↗
6. Hydrogen accumulation in and at the perimeter of U–C–N–O inclusions in uranium – a SIMS analysis10.1016/j.jallcom.2015.01.050 ↗
7. The crystallographic structure of the air-grown oxide on depleted uranium metal10.1016/j.corsci.2016.05.036 ↗
8. Effect of carbo-nitride-rich and oxide-rich inclusions on the pitting susceptibility of depleted uranium10.1016/j.corsci.2017.05.019 ↗
9. A review of uranium corrosion by hydrogen and the formation of uranium hydride10.1016/j.corsci.2018.03.002 ↗
10. The effect of work-hardening and thermal annealing on the early stages of the uranium-hydrogen corrosion reaction10.1016/j.corsci.2017.11.017 ↗
11. Preshock-induced phase transition in spalled U–0.75 wt% Ti10.1016/S0022-3115(98)00462-0 ↗
12. Civil use of depleted uranium10.1016/S0265-931X(02)00042-5 ↗
13. Rapidly solidified U–6wt%Nb powders for dispersion-type nuclear fuels10.1016/j.jnucmat.2014.01.033 ↗
14. Why is weapons grade plutonium more hazardous to work with than highly enriched uranium?10.1016/j.jchas.2014.10.004 ↗
15. The influence of impurities on the crystal structure and mechanical properties of additive manufactured U–14at.% Nb10.1016/j.scriptamat.2016.11.010 ↗
16. Light impurity atoms as the probes for the electronic structures of actinide dioxides10.1016/j.commatsci.2017.10.003 ↗
17. Corrosion of uranium in liquid water under vacuum contained conditions. Part 1: The initial binary U + H2O(l) system10.1016/j.corsci.2019.02.017 ↗
18. Corrosion of uranium in liquid water under contained conditions with a headspace deuterium overpressure. Part 2: The ternary U + H2O(l) + D2 system10.1016/j.corsci.2019.02.016 ↗
19. An examination of the initial oxidation of a uranium-base alloy (U–14.1 at.% Nb) by O2 and D2O using surface-sensitive techniques10.1016/S0169-4332(99)00225-1 ↗
20. Hackenberg · 2012
21. Crystallographic and kinetic origins of acicular and banded microstructures in U–Nb alloys10.1016/j.jnucmat.2013.01.309 ↗
22. Low temperature age hardening in U–13 at.% Nb: an assessment of chemical redistribution mechanisms10.1016/j.jnucmat.2009.06.025 ↗
23. Straightforward understanding of the structures of metastable α’’ and possible ordered phases in uranium–niobium alloys from crystallographic simulation10.1016/j.jallcom.2015.06.271 ↗
24. Temperature dependence of Young’s modulus and shear modulus in uranium-2.4 wt% niobium alloy10.1016/0022-3115(90)90385-Z ↗
25. An investigation of superplasticity in a thermomechanically processed U-6Nb (α + γ2) alloy10.1007/BF02657325 ↗
26. Surface characterization of oxidative corrosion of U–Nb alloys10.1116/1.1359548 ↗
27. Corrosion of uranium and uranium alloys
28. The microstructure and hydriding characteristics of high temperature aged U–13 at.%Nb alloy10.1016/j.jnucmat.2015.03.051 ↗
29. The effects of microstructure on the hydriding for 500 °C/2 h aged U-13at.%Nb alloy10.1016/j.jnucmat.2017.03.014 ↗
30. The partition coefficient of alloying elements and its influence on the pitting corrosion resistance of 15Cr-2Ni duplex stainless steel10.1016/j.corsci.2018.04.038 ↗
31. Influence of tempering treatment on microstructure and pitting corrosion of 13wt.% Cr martensitic stainless steel10.1016/j.corsci.2017.12.012 ↗
32. Mittemeijer · 2011
33. Observation of the pitting corrosion and uniform corrosion for X80 steel in 3.5 wt.% NaCl solutions using in-situ and 3-D measuring microscope10.1016/j.corsci.2016.05.037 ↗
34. Study of nobility of chromium nitrides in isothermally aged duplex stainless steels by using SKPFM and SEM/EDS10.1016/j.corsci.2009.08.057 ↗
35. SKPFM measured Volta potential correlated with strain localisation in microstructure to understand corrosion susceptibility of cold-rolled grade 2205 duplex stainless steel10.1016/j.corsci.2015.06.035 ↗
36. Phase transformation of metastable discontinuous precipitation products to equilibrium phases in U10Mo alloys10.1016/j.scriptamat.2018.07.010 ↗
37. Effect of niobium element on the electrochemical corrosion behavior of depleted uranium10.1016/j.jnucmat.2016.05.035 ↗
38. Influence of the aging time on the microstructure and electrochemical behaviour of a 15-5PH ultra-high strength stainless steel10.1016/j.corsci.2018.04.032 ↗
39. Kinetics of lamellar decomposition reactions in U-Nb alloys10.4028/www.scientific.net/SSP.172-174.555 ↗
40. Phase transformations in a uranium + 14 at.% niobium alloy10.1016/0001-6160(80)90173-X ↗