Dislocation dynamics in a nickel-based superalloy via in-situ transmission scanning electron microscopy
Source abstract
Abstract
Abstract Micro-tensile specimens of nickel-based superalloy oligocrystals were tested in-situ in an scanning electron microscope in transmission mode (TSEM) enabling observation of dislocations. The dynamics of dislocation motion during tensile loading were captured and correlated with the measured intermittencies during plastic flow recorded by high load- and temporal-resolution sensors. This investigation in particular focused on the dislocation behavior near twin boundaries with different slip configurations. A multiplicity of deformation mechanisms at the dislocation scale were observed within individual slip bands, including precipitate shearing, dislocation decorrelation and antiphase boundary-coupled shearing. These processes affect strain localization near twin boundaries and provide new defect-level insights on plastic localization and fatigue crack initiation in these alloys.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Temperature Alloys and Creep · Microstructure and mechanical properties · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
Show source-provided references
1. Ross
2. Size-affected single-slip behavior of pure nickel microcrystals10.1016/j.actamat.2005.05.023 ↗
3. The effects of heat treatment on very high cycle fatigue behavior in hot-rolled WE43 magnesium10.1016/j.ijfatigue.2016.05.033 ↗
4. High frequency in situ fatigue response of ni-base superalloy René-N5 microcrystals10.1016/j.actamat.2017.10.049 ↗
5. Alam · 2016 · 561
6. In-situ high-temperature tensile testing of a polycrystalline nickel-based superalloy10.1080/09603409.2016.1180857 ↗
7. Afm observations of slip band development in al single crystals10.1016/j.actamat.2005.06.019 ↗
8. In-situ sem observation of phase transformation and twinning mechanisms in an interstitial high-entropy alloy10.1016/j.actamat.2018.01.036 ↗
9. A study on the geometry of dislocation patterns in the surrounding of nanoindents in a twip steel using electron channeling contrast imaging and discrete dislocation dynamics simulations10.1016/j.msea.2015.03.078 ↗
10. Reed. On the origin of creep dislocations in a ni-base, single-crystal superalloy: an ecci, ebsd, and dislocation dynamics-based study10.1016/j.actamat.2016.02.038 ↗
11. In situ electron backscatter diffraction (ebsd) during the compression of micropillars10.1016/j.msea.2010.03.055 ↗
12. Strains, planes, and ebsd in materials science10.1016/S1369-7021(12)70163-3 ↗
13. Cathodoluminescence studies of dislocation motion in IIb–VIb compounds deformed in SEM10.1007/BF00542736 ↗
14. Case studies on the application of high-resolution electron channelling contrast imaging – investigation of defects and defect arrangements in metallic materials10.1080/14786435.2015.1006296 ↗
15. Transmission scanning electron microscopy: Defect observations and image simulations10.1016/j.ultramic.2017.11.004 ↗
16. Digital image correlation under scanning electron microscopy: Methodology and validation10.1007/s11340-013-9782-x ↗
17. Sub-grain scale digital image correlation by electron microscopy for polycrystalline materials during elastic and plastic deformation
18. Characterisation of strain localisation processes during fatigue crack initiation and early crack propagation by sem-dic in an advanced disc alloy10.1016/j.msea.2017.05.091 ↗
19. High resolution digital image correlation measurements of strain accumulation in fatigue crack growth10.1016/j.ijfatigue.2012.06.010 ↗
20. Plastic strain mapping with sub-micron resolution using digital image correlation10.1007/s11340-012-9685-2 ↗
21. High resolution mapping of strain localization near twin boundaries in a nickel-based superalloy
22. Slip transfer across grain/twin boundaries in polycrystalline ni-based superalloys10.1016/j.msea.2017.06.072 ↗
23. High resolution mapping of strain localization near twin boundaries in a nickel-based superalloy
24. Deformation Modes Gamma’ Precipitation Hardened Nickel-Base Alloys
25. Decorrelated movements of shockley partial dislocations in the γ-phase channels of nickel-based superalloys at intermediate temperature10.1080/14786430500254685 ↗
26. Dislocation decorrelation and relationship to deformation microtwins during creep of a γ' precipitate strengthened ni-based superalloy10.1016/j.actamat.2011.07.069 ↗
27. Chapter 63 dislocations and high-temperature plastic deformation of superalloy single crystals10.1016/S1572-4859(02)80014-6 ↗
28. Reed · 2006
29. Shearing of gamma prime precipitates in ni-base superalloys: A phase field study incorporating the effective gamma-surface
30. Development and introduction of a damage tolerant high temperature nickel-base disk alloy
31. Fatigue crack initiation in nickel-based superalloy rené 88 dt at 593 c
32. A combined grain scale elastic–plastic criterion for identification of fatigue crack initiation sites in a twin containing polycrystalline nickel-base superalloy10.1016/j.actamat.2015.09.050 ↗
33. A combined grain scale elastic–plastic criterion for identification of fatigue crack initiation sites in a twin containing polycrystalline nickel-base superalloy10.1016/j.actamat.2015.09.050 ↗
34. The structure of rené88dt
35. Study of defect evolution by tem with in situ ion irradiation and coordinated modeling10.1080/14786435.2012.662601 ↗
36. Crack initiation during high cycle fatigue of an austenitic steel10.1016/0956-7151(90)90305-Z ↗
37. A combined grain scale elastic-plastic criterion for identification of fatigue crack initiation sites in a twin containing polycrystalline nickel-base superalloy10.1016/j.actamat.2015.09.050 ↗
38. Fatigue crack initiation, slip localization and twin boundaries in a nickel-based superalloy10.1016/j.cossms.2014.06.001 ↗
39. Modeling crack nucleation at coherent twin boundaries in nickel - modeling crack ncleation at coherent twin boundaries in nickel-based superalloys
40. Crystallographic fatigue crack initiation in nickel-based superalloy rené 88dt at elevated temperature10.1016/j.actamat.2009.08.022 ↗
41. Fatigue deformation in a polycrystalline nickel base superalloy at intermediate and high temperature: Competing failure modes
42. Scale-free intermittent flow in crystal plasticity10.1126/science.1123889 ↗
43. Dislocation avalanches, strain bursts, and the problem of plastic forming at the micrometer scale10.1126/science.1143719 ↗
44. From mild to wild fluctuations in crystal plasticity10.1103/PhysRevLett.114.105504 ↗
45. Slip statistics of dislocation avalanches under different loading modes10.1103/PhysRevE.91.042403 ↗