Precipitation and hardening in irradiated low alloy steels with a wide range of Ni and Mn compositions
Source abstract
Abstract
Abstract Mn-Ni-Si intermetallic precipitates (MNSPs) that are observed in some Fe-based alloys following thermal aging and irradiation are of considerable scientific and technical interest. For example, large volume fractions (f) of MNSPs form in reactor pressure vessel low alloy steels irradiated to high fluence, resulting in severe hardening induced embrittlement. Nine compositionally-tailored small heats of low Cu RPV-type steels, with an unusually wide range of dissolved Mn (0.06–1.34 at.%) and Ni (0.19–3.50 at.%) contents, were irradiated at ≈ 290 °C to ≈ 1.4 × 1020 n/cm2 at an accelerated test reactor flux of ≈3.6 × 1012 n/cm2-s (E > 1 MeV). Atom probe tomography shows Mn-Ni interactions play the dominant role in determining the MNSP f, which correlates well with irradiation hardening. The wide range of alloy compositions results in corresponding variations in precipitates chemistries that are reasonably similar to various phases in the Mn-Ni-Si projection of the Fe based quaternary. Notably, f scales with ≈ Ni1.6Mn0.8. Thus f is modest even in advanced high 3.5 at.% Ni steels at very low Mn (Mn starvation); in this case Ni-silicide phase type compositions are observed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Materials Characterization Techniques · Fusion materials and technologies · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (55)
Show source-provided references
1. Non-uniform phase separation in ferrite of a duplex stainless steel10.1016/j.actamat.2017.08.044 ↗
2. Using complimentary microscopy methods to examine Ni-Mn-Si-precipitates in highly-irradiated reactor pressure vessel steels10.1016/j.actamat.2017.05.043 ↗
3. The two-step nucleation of G-phase in ferrite10.1016/j.actamat.2016.06.013 ↗
4. Precipitate modification in PH13-8 Mo type maraging steel10.1016/j.actamat.2011.04.053 ↗
5. G phase precipitation and strengthening in ultra-high strength ferritic steels: towards lean “maraging” metallurgy10.1016/j.actamat.2017.03.032 ↗
6. Martin · 1980
7. A dispersion strengthening model based on differing elastic moduli applied to the iron-copper system10.1016/0001-6160(72)90091-0 ↗
8. Nuclear Energy Agency · 2006
9. Multiscale-multiphysics modeling of Materials : embrittlement of pressure-vessel steels10.1557/mrs2001.39 ↗
10. Embrittlement of nuclear reactor pressure vessels10.1007/s11837-001-0081-0 ↗
11. Predictive reactor pressure vessel steel irradiation embrittlement models: issues and opportunities10.1007/s11837-009-0097-4 ↗
12. English · 2012
13. On the dominant mechanism of irradiation embrittlement of reactor pressure vessel steels10.1016/0036-9748(83)90280-6 ↗
14. Recent progress in understanding reactor pressure vessel steel embrittlement10.1080/10420159808229676 ↗
15. Primary damage formation in bcc iron10.1016/S0022-3115(97)00256-0 ↗
16. Irradiation-induced solute clustering in a low nickel FeMnNi ferritic alloy10.1007/s11340-011-9476-1 ↗
17. Cluster-dynamics modelling of defects in a-iron under cascade damage conditions10.1016/j.jnucmat.2008.08.010 ↗
18. Radiation-induced precipitation in a ferritic model alloy: an experimental and theoretical study10.1016/j.actamat.2013.07.008 ↗
19. Formation and evolution of MnNi clusters in neutron irradiated dilute Fe alloys modelled by a first principle-based AKMC method10.1016/j.jnucmat.2012.03.033 ↗
20. Synthesis of atom probe experiments on irradiation-induced solute segregation in French ferritic pressure vessel steels10.1016/S0022-3115(00)00056-8 ↗
21. Irradiation-induced microstructural changes, and hardening mechanisms
22. Embrittlement of RPV steels: an atom probe tomography perspective10.1016/j.jnucmat.2007.05.003 ↗
23. On the ductile to brittle transition in martensitic stainless steels — mechanisms, models and structural implications10.1016/0022-3115(94)90032-9 ↗
24. Effect of microstructure on cleavage fracture toughness in mild steel10.1179/msc.1979.13.6.341 ↗
25. Thermodynamic and kinetic modeling of Mn-Ni-Si precipitates in low-Cu reactor pressure vessel steels10.1016/j.actamat.2017.07.021 ↗
26. Eason
27. On the effect of dose rate on irradiation hardening of RPV steels10.1080/14786430412331319910 ↗
28. Evolution of manganese–nickel–silicon-dominated phases in highly irradiated reactor pressure vessel steels10.1016/j.actamat.2014.07.040 ↗
29. Structural characterization of nanoscale intermetallic precipitates in highly neutron irradiated reactor pressure vessel steels10.1016/j.scriptamat.2015.10.019 ↗
30. Acta Materialia Thermodynamics and kinetics of core-shell versus appendage co- precipitation morphologies : an example in the Fe-Cu-Mn-Ni-Si system10.1016/j.actamat.2018.07.037 ↗
31. Update on the ATR-2 reactor pressure vessel steel high fluence irradiation project, light water react
32. Microstructural aspects of irradiation damage in A508 Gr 4N forging steel: composition and flux effects
33. Evaluation of irradiation embrittlement of A508 Gr 4N and comparison to other low-alloy steels
34. Temperature dependence and variability of fracture toughness in the transition regime for A508 grade 4N pressure vessel steel
35. Critical cleavage fracture stress characterization of A508 nuclear pressure vessel steels10.1016/j.ijpvp.2014.08.003 ↗
36. Comparison of Fracture Properties in SA508 Gr.3, Gr.4N high strength low alloy steels for advanced pressure vessel materials10.1016/j.ijpvp.2015.04.010 ↗
37. Gault · 2012
38. Miller · 2000
39. Atom probe tomography applied to the analysis of irradiated microstructures10.1557/jmr.2014.398 ↗
40. Microscopy microanalysis estimation of the reconstruction parameters for atom probe tomography10.1017/S1431927608080690 ↗
41. Applications of atom-probe tomography to the characterisation of solute behaviours10.1016/j.mser.2010.05.001 ↗
42. On the analysis of clustering in an irradiated low alloy reactor pressure vessel steel weld10.1017/S1431927617000162 ↗
43. Evolution of precipitation in reactor pressure vessel steel welds under neutron irradiation10.1016/j.jnucmat.2017.03.019 ↗
44. Uncertainties and assumptions associated with APT and SANS characterisation of irradiation damage in RPV steels10.1016/j.jnucmat.2013.07.029 ↗
45. Wells · 2015
46. Study of the structure, composition, and stability of Y-Ti-O nm-scale features
47. Multi-technique characterization of the precipitates in thermally aged and neutron irradiated Fe-Cu and Fe-Cu-Mn model alloys: atom probe tomography reconstruction implications10.1016/j.actamat.2017.12.006 ↗
48. Experimental artefacts occurring during atom probe tomography analysis of oxide nanoparticles in metallic matrix: quantification and correction10.1016/j.jnucmat.2017.05.008 ↗
49. Determining the composition of small features in atom probe: bcc Cu-rich precipitates in an Fe-rich matrix10.1016/j.ultramic.2008.09.010 ↗
50. Focused ion beam sample preparation for atom probe tomography
51. An analysis of the structure of irradiation induced Cu-enriched clusters in low and high nickel welds10.1557/PROC-650-R6.6 ↗
52. New techniques for the analysis of fine-scaled clustering phenomena within atom probe tomography (APT) data10.1017/S1431927607070900 ↗
53. A sensitivity analysis of the maximum separation method for the characterisation of solute clusters10.1016/j.ultramic.2010.12.015 ↗
54. Monte Carlo study of decorated dislocation loops in FeNiMnCu model alloys10.1016/j.jnucmat.2014.05.051 ↗
55. Thermodynamic models of low temperature Mn-Ni-Si precipitation in reactor pressure vessel steels