Autonomous filling of creep cavities in Fe-Au alloys studied by synchrotron X-ray nano-tomography
Source abstract
Abstract
Abstract The autonomous filling of creep-loading induced grain-boundary cavities by gold-rich precipitates at a temperature of 550 °C has been studied as a function of the applied load for Fe-Au alloys using synchrotron X-ray nano-tomography. The alloy serves as a model alloy for future self-healing creep resistant steels. The size, shape and spatial distribution of cavities and precipitates are analyzed quantitatively in 3D at a nanometer resolution scale. The filling ratios for individual cavities are determined and thus a map of the filling ratio evolution is obtained. It is found that the gold-rich precipitates only form at cavity surfaces and thereby repair the creep cavity. The shape of the cavities changes from equiaxed to planar crack like morphologies as the cavities grow. The time evolution of the filling ratio is explained by a simple model considering isolated cavities as well as linked cavities. The model predictions are in good agreement with the measurements.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and mechanical properties · High Temperature Alloys and Creep · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (49)
Show source-provided references
1. Lemaitre · 2005
2. Overview No. 3: fracture-mechanism maps and their construction for fcc metals and alloys10.1016/0001-6160(79)90105-6 ↗
3. Creep-strengthening of steel at high temperatures using nano-sized carbonitride dispersions10.1038/nature01740 ↗
4. Microstructural stability and creep rupture strength of the martensitic steel P92 for advanced power plant10.1016/S1359-6454(97)00176-6 ↗
5. Strengthening mechanisms of creep resistant tempered martensitic steel10.2355/isijinternational.41.641 ↗
6. On the effect of long-term creep on the microstructure of a 12% chromium tempered martensite ferritic steel10.1016/j.actamat.2009.07.010 ↗
7. Autonomic healing of polymer composites10.1038/35057232 ↗
8. Self-healing materials10.1002/adma.201003036 ↗
9. Healing of nanocracks by disclinations10.1103/PhysRevLett.111.145501 ↗
10. 2015
11. Beneficial effect of B segregation on creep cavitation in a type 347 austenitic stainless steel10.1016/j.scriptamat.2004.11.016 ↗
12. An advanced creep cavitation resistance Cu-containing 18Cr–12Ni–Nb austenitic stainless steel10.1016/j.scriptamat.2006.12.030 ↗
13. Improved creep strength and creep ductility of type 347 austenitic stainless steel through the self-healing effect of boron for creep cavitation10.1007/s11661-005-0311-0 ↗
14. In situ determination of aging precipitation in deformed Fe-Cu and Fe-Cu-BN alloys by time-resolved small-angle neutron scattering10.1103/PhysRevB.82.174111 ↗
15. Thermally activated precipitation at deformation-induced defects in Fe-Cu and Fe-Cu-B-N alloys studied by positron annihilation spectroscopy10.1103/PhysRevB.81.094103 ↗
16. Preferential Au precipitation at deformation-induced defects in Fe–Au and Fe–Au–B–N alloys10.1016/j.jallcom.2013.09.011 ↗
17. Defect-induced Au precipitation in Fe–Au and Fe–Au–B–N alloys studied by in situ small-angle neutron scattering10.1016/j.actamat.2013.08.015 ↗
18. Self-healing of creep damage by gold precipitation in iron alloys10.1002/adem.201400511 ↗
19. Autonomous repair mechanism of creep damage in Fe-Au and Fe-Au-B-N alloys10.1007/s11661-015-3169-9 ↗
20. Simultaneous tomography and diffraction analysis of creep damage10.1126/science.1106778 ↗
21. Quantitative X-ray tomography10.1179/1743280413Y.0000000023 ↗
22. Three-dimensional characterization of fatigue-relevant intermetallic particles in high-strength aluminium alloys using synchrotron X-ray nanotomography10.1080/14786435.2015.1076940 ↗
23. Direct measurement procedure for three-dimensional local crack driving force using synchrotron X-ray microtomography10.1016/j.actamat.2008.08.022 ↗
24. High-temperature strength and damage evolution in short fiber reinforced aluminum alloys studied by miniature creep testing and synchrotron microtomography10.1016/j.actamat.2011.09.022 ↗
25. Initiation and growth of damage in a dual-phase steel observed by X-ray microtomography10.1016/j.actamat.2008.06.015 ↗
26. Non-destructive 3-D reconstruction of the martensitic phase in a dual-phase steel using synchrotron holotomography10.1016/j.scriptamat.2012.03.003 ↗
27. A. Pacureanu, Y. Yang, J.C. da Silva, R. Baker, R. Barrett, S. Bohic, Y. Dabin, F. Fus, E. Gagliardini, C. Guilloud, O. Hignette, M. Hubert, M. Langer, J. Meyer, C. Morawe, J. Morse, R. Tachoueres, P. van der Linden, F. Villar, L. Weber, P. Cloetens, The ESRF Upgrade nanoprobe beamline ID16A-NI for hard X-ray coherent imaging and fluorescence microscopy, manuscript under preparation for J. Synchrotron Radiation.
28. Holotomography: quantitative phase tomography with micrometer resolution using hard synchrotron radiation X rays10.1063/1.125225 ↗
29. The PyHST2 hybrid distributed code for high speed tomographic reconstruction with iterative reconstruction and a priori knowledge capabilities10.1016/j.nimb.2013.09.030 ↗
30. http://www.diplib.org/.
31. Shape complexity in turbulence10.1103/PhysRevLett.80.968 ↗
32. Volume, shape, and roundness of quartz particles
33. Three-dimensional characterization of the microstructure of a metal–matrix composite by holotomography10.1016/j.msea.2003.09.068 ↗
34. In situ 3D quantification of the evolution of creep cavity size, shape, and spatial orientation using synchrotron X-ray tomography10.1016/j.msea.2007.05.108 ↗
35. Factors affecting the high temperature strength of polycrystalline solids10.1016/0001-6160(62)90058-5 ↗
36. Cadek · 1988
37. Intergranular fracture at elevated temperature10.1016/0001-6160(75)90047-4 ↗
38. Plastic creep flow effects in the diffusive cavitation of grain boundaries10.1016/0001-6160(80)90001-2 ↗
39. Overview no. 2: non-equilibrium models for diffusive cavitation of grain interfaces10.1016/0001-6160(79)90021-X ↗
40. Cavity growth on a sliding grain boundary10.1007/BF02663303 ↗
41. Intergranular fracture during power-law creep10.1016/0001-6160(79)90173-1 ↗
42. Creep cavitation in metals10.1016/S0749-6419(02)00111-0 ↗
43. A simplified model for creep induced grain boundary cavitation validated by multiple cavity growth simulations10.1016/j.commatsci.2012.01.033 ↗
44. Creep rupture behavior of Grade 91 steel10.1016/j.msea.2012.12.031 ↗
45. Stress induced creep cavity10.1016/j.msea.2013.12.097 ↗
46. Calculation of diffusion penetration curves for surface and grain boundary diffusion10.1063/1.1699825 ↗
47. Diffusive growth of grain-boundary cavities10.1016/0001-6160(81)90009-2 ↗
48. Growth of grain boundary precipitates in Al-4% Cu by interfacial diffusion10.1016/0001-6160(68)90097-7 ↗
49. The effects of segregation on the kinetics of intergranular cavity growth under creep conditions10.1007/BF02643773 ↗