Hierarchical phase separation behavior in a Ni-Si-Fe alloy
Source abstract
Abstract
Abstract Improving the properties of durable high-temperature alloys is based on the fundamental understanding of the link between microstructure and three-dimensional (3D) nanochemistry. Here we utilize a complementary approach of transmission electron microscopy and atom probe tomography to link microstructure and 3D nanochemistry of a ternary single crystal Ni83.9Si13Fe3.1 (at.%) model alloy. The formation of a γ/γ' microstructure is revealed, containing primary and secondary γ' precipitates analogous to Ni-based superalloys. Subsequently, microstructural hierarchy is created by the formation of γ particles inside primary γ' precipitates. The correlated supersaturation with γ forming elements (Ni, Fe) of primary γ' precipitates was identified as driving force for the formation of γ particles. The influence of aging on the mechanical properties is reported and peak hardness is achieved after 24 h of aging at 923 K. Thermo-Calc equilibrium phase concentrations based on the TTNi8 database where found to be closer to the APT data than the TCNi8 based values. Our results suggest that improved stability of γ particles can be achieved by tailoring the phase chemistry and the lattice misfit.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Advanced Materials Characterization Techniques · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (65)
Show source-provided references
1. Corrosion and passivation of a nickel-silicon-base alloy in sulphuric acid solutions10.1016/0013-4686(71)85150-2 ↗
2. Nickel-based superalloys for advanced turbine engines : chemistry, microstructure, and properties10.2514/1.18239 ↗
3. Classification and microstructural stability of high generation single crystal Nickel-based superalloys
4. Gamma/gamma-prime microstructure formed by phase separation of gamma-prime precipitates in a Ni-Al-Ti alloy
5. Electron tomography imaging and analysis of γ′ and γ domains in Ni-based superalloys10.1002/adma.200702461 ↗
6. Mapping the evolution of hierarchical microstructures in a Ni-based superalloy10.1038/ncomms3955 ↗
7. The origin and stability of nanostructural hierarchy in crystalline solids10.1126/sciadv.aao6051 ↗
8. Kolb · 2019
9. Ferritic alloys with extreme creep resistance via coherent hierarchical precipitates10.1038/srep16327 ↗
10. A hierarchical microstructure due to chemical ordering in the bcc lattice: early stages of formation in a ferritic Fe-Al-Cr-Ni-Ti alloy10.1016/j.actamat.2015.03.043 ↗
11. On local phase equilibria and the appearance of nanoparticles in the microstructure of single-crystal Ni-base superalloys10.1002/adem.201600237 ↗
12. APFIM characterization of single-crystal PWA 1480 nickel-base superalloy10.1016/0169-4332(94)90339-5 ↗
13. Atom probe tomography investigation of the microstructure of superalloys N1810.1016/S1359-6454(01)00395-0 ↗
14. Transmission Electron Microscopy (TEM) observations of phase-separations of gamma-prime precipitates in Ni-Al-Fe and Ni-Si-Fe ternary alloys10.4028/www.scientific.net/AMR.26-28.1311 ↗
15. TEM observations of two-phase microstructure formed by phase separation of gamma-prime precipitates in Ni-Al-Si alloys10.4028/www.scientific.net/MSF.561-565.2361 ↗
16. γ′ phase instabilities in high refractory content γ-γ′ Ni-base superalloys10.7449/Superalloys/2016/Superalloys_2016_199_208 ↗
17. Mechanical behavior of nonstoichiometric compounds NiSi, NiGe, and FeGa.10.1007/BF02644399 ↗
18. Tracing the three-dimensional nanochemistry of phase separation in an inverse Ni-based superalloy10.1016/j.actamat.2018.07.038 ↗
19. Lattice misfits in four binary Ni-Base γ/γ’ alloys at ambient and elevated temperatures10.1007/BF02663837 ↗
20. Phase equilibria and γ′-L12 phase stability in the Ni-rich portion of Ni-Fe-Si and Ni-Fe-Al systems10.1016/j.intermet.2004.10.009 ↗
21. Einkristalline Gasturbinenschaufeln aus Nickel basis-Legierungen, Teil I, Mater10.1002/mawe.19940250804 ↗
22. Thermo-Calc & DICTRA, computational tools for materials science10.1016/S0364-5916(02)00037-8 ↗
23. Thermotech, TTNi8: Thermotech Ni-based Superalloys Database, (2015).
24. In situ site-specific specimen preparation for atom probe tomography10.1016/j.ultramic.2006.06.008 ↗
25. Thermotech, TCNi8: TCS Ni-based Superalloys Database, (2015). https://www.thermocalc.com/media/23650/tcni8_extended_info.pdf.
26. ImageJ, https://imagej.nih.gov/ij/, (2018).
27. Effect of laser pulsing on the composition measurement of an Al-Mg-Si-Cu alloy using three-dimensional atom probe10.1016/j.ultramic.2008.10.012 ↗
28. Gault · 2012
29. Post-ionization of field-evporated ions10.1103/PhysRevLett.44.1520 ↗
30. The post-ionization of field evaporated ions: a theoretical explanation of multiple charge states10.1016/0039-6028(82)90434-4 ↗
31. Analysis of three-dimensional atom-probe data by the proximity histogram10.1007/S100050010051 ↗
32. Two- and three-dimensional equilibrium morphology of a misfitting particle and the Gibbs–Thomson effect10.1016/j.actamat.2004.08.041 ↗
33. The equilibrium shape of a misfitting precipitate10.1016/0956-7151(94)90036-1 ↗
34. First-principle study of interfacial properties of Ni-Ni3Si composite10.1016/j.commatsci.2013.06.030 ↗
35. First-principles study of nickel-silicides ordered phases10.1016/j.jallcom.2010.10.118 ↗
36. Temperature dependence of x-ray intensity profile FWHM of the γ’ phase in the creep-deformed single crystal superalloy SC1610.1088/0022-3727/38/10A/038 ↗
37. Measurement of the lattice misfit of the nickel-base superalloy SC16 by high-energy synchrotron radiation10.1007/s11661-003-0321-8 ↗
38. Phase-field simulation of coarsening of γ precipitates in an ordered γ′ matrix10.1016/j.actamat.2007.07.014 ↗
39. Interfacial free energies and solute diffusivities from data on ostwald ripening10.1007/BF00207013 ↗
40. Three-dimensional model of precipitation of ordered intermetallics10.1016/S1359-6454(99)00107-X ↗
41. The kinetics of precipitation from supersaturated solid solutions10.1016/0022-3697(61)90054-3 ↗
42. Theorie der Alterung von Niederschlägen durch Umlösen (Ostwald-Reifung)
43. Bimodal size distributions of γ′ precipitates in Ni-Al-Mo II. Transmission electron microscopy10.1016/0956-7151(95)00044-V ↗
44. Evolution of microstructure of Nickel base superalloy at high temperatures10.1179/174328406X91168 ↗
45. Coarsening of γ (Ni-Al solid solution) precipitates in a γ′ (Ni3Al) matrix; a striking contrast in behavior from normal γ/γ’ alloys10.1016/j.scriptamat.2005.02.032 ↗
46. The influence of heat treatment conditions on γ′ characteristics in Udimet 72010.1016/j.msea.2004.01.027 ↗
47. Heat treatment of UDIMET 720Li: the effect of microstructure on properties10.1016/S0921-5093(98)00867-3 ↗
48. Hardening of γ′-Ni3(Al,Ti) by precipitation of disordered γ10.1016/0036-9748(86)90469-2 ↗
49. Strengthening of an L1-ordered γ’-intermetallic by disordered γ-particles. Part I: computer simulations10.1016/S1359-6454(01)00095-7 ↗
50. Strengthening of an L1-ordered γ′-intermetallic by disordered γ-particles. Part II: measurements of the crss and tem observations of dislocation processes in Ni69Co9Al18Ti410.1016/S1359-6454(01)00096-9 ↗
51. Evolution of nanoscale clusters in γ′ precipitates of a Ni-Al-Ti model alloy10.1016/j.ultramic.2015.04.021 ↗
52. Thermally induced interdiffusion and precipitation in a Ni/Ni3Al system10.1080/21663831.2015.1045630 ↗
53. Diffusion in Ni3Al, Ni3Ga and Ni3Ge10.1016/S0921-5093(00)01864-5 ↗
54. Diffusion of copper, iron and silicon in Ni3Al10.4028/www.scientific.net/DDF.95-98.859 ↗
55. Interdiffusion in ternary Ni3Al/Ni3Al-X diffusion couples with X = Cr, Fe, Nb and Ti10.1016/S0966-9795(03)00118-3 ↗
56. Solute diffusion of Al-substituting elements in Ni3Al and the diffusion mechanism of the minority component10.1016/S1359-6454(98)00109-8 ↗
57. Tracer diffusion in pure and boron-doped Ni3Al10.1016/0001-6160(88)90279-9 ↗
58. Alloying behaviour of NIAl, NiGa, NiSi and NiGe10.1016/0001-6160(84)90057-9 ↗
59. Diffusion in Intermetallics
60. First-principles study on the structural, elastic, and thermodynamics properties of Ni3X (X: Al, Mo, Ti, Pt, Si, Nb, V, and Zr) intermetallic compounds10.1007/s00339-013-8201-6 ↗
61. Mechanisms related to different generations of γ′ precipitation during continuous cooling of a nickel base superalloy10.1016/j.actamat.2012.09.058 ↗
62. Evolution of Size and Morphology of γ’ Precipitates in UDIMET 720 Li during Continuous Cooling
63. Atom probe tomography of secondary γ′ precipitation in a single crystal Ni-based superalloy after isothermal aging at 1100 °C10.1016/j.jallcom.2014.05.132 ↗
64. Atomistic simulations in ternary Ni-Ti-Al alloys10.1088/0965-0393/4/4/003 ↗
65. Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element10.2320/matertrans.46.2817 ↗