Twinning-induced dislocation and coordinated deformation behavior of a high-Nb TiAl alloy during high-cycle fatigue
Source abstract
Abstract
The deformation mechanism responsible for the high-cycle rotating bending fatigue of a high-Nb TiAl alloy was investigated. Fatigue deformation in the γ phase was dominated by superlattice dislocations [0 1 1¯] and twinning. Dislocations 〈1 1 0〉 in the B2 phase can be induced by twins in the adjacent γ phase, which has a low stacking fault energy owing to the high Nb content. Stress transfer between two adjacent phases can be accomplished through atomic rearrangement of the interface by twinning. The local stresses were accommodated by the continuous dislocation slip of the B2 phase, deformation twins, and twin intersections in the γ phase.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · Semiconductor materials and interfaces · Microstructure and mechanical properties
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References (68)
Show source-provided references
1. Evading the strength-ductility trade-off at room temperature and achieving ultrahigh plasticity at 800℃ in a TiAl alloy10.1016/j.actamat.2021.117585 ↗
2. An innovative way to fabricate γ-TiAl blades and their failure mechanisms under thermal shock10.1016/j.scriptamat.2021.114092 ↗
3. TiAl alloys in commercial aircraft engines10.1080/09603409.2016.1183068 ↗
4. Design, processing, microstructure, properties, and applications of advanced intermetallic TiAl alloys10.1002/adem.201200231 ↗
5. Evolution of the ωo phase in a β-stabilized multi-phase TiAl alloy and its effect on hardness10.1016/j.actamat.2013.10.036 ↗
6. Polysynthetic twinned TiAl single crystals for high-temperature applications10.1038/nmat4677 ↗
7. On the origin of superior high strength of Ti–45Al–10Nb alloys10.1016/S0966-9795(02)00008-0 ↗
8. Fracture and R-curve behavior of an intermetallic β-stabilized TiAl alloy with different nearly lamellar microstructures10.1016/j.intermet.2014.04.005 ↗
9. The cavitation of high Nb-containing TiAl alloys during tensile tests around BDTT10.1016/j.msea.2018.05.028 ↗
10. Alloying Mechanism of Beta Stabilizers in a TiAl Alloy10.1007/s11661-001-0136-4 ↗
11. Microstructure determined fracture behavior of a high Nb containing TiAl alloy10.1016/j.msea.2016.04.074 ↗
12. On the role of microstructure in fatigue-crack growth of γ-based titanium aluminides10.1016/S0921-5093(97)00658-8 ↗
13. Evolution of fatigue crack growth and fracture behavior in gamma titanium aluminide Ti-43.5Al-4Nb-1Mo-0.1B (TNM) forgings10.1016/j.ijfatigue.2018.01.026 ↗
14. Fatigue crack growth and fracture behavior of as-cast Ti-43.5Al-4Nb-1Mo- 0.1B (TNM) compared to Ti-48Al-2Nb-2Cr (4822)10.1016/j.intermet.2017.08.015 ↗
15. Fatigue crack growth behavior of wrought γ-based TiAl alloy containing β-phase10.1016/j.intermet.2018.04.024 ↗
16. Temperature dependent fatigue crack growth in forged TiAl alloys with nearly-lamellar and triplex microstructure10.1016/j.msea.2021.140802 ↗
17. Low cycle fatigue, creep and creep-fatigue interaction behavior of a TiAl alloy at high temperatures10.1016/j.scriptamat.2017.09.016 ↗
18. A β-solidifying TiAl alloy reinforced with ultra-fine Y-rich precipitates10.1016/j.scriptamat.2020.10.010 ↗
19. On the high creep strength of the W containing IRIS-TiAl alloy at 850°C10.1016/j.actamat.2019.09.056 ↗
20. Temperature dependent anisotropic mechanical behavior of TiAl based alloys10.1016/j.ijplas.2021.103175 ↗
21. Deformation-induced internal stresses in multiphase titanium aluminide alloys10.1016/j.actamat.2013.10.024 ↗
22. Transverse deformation of a lamellar TiAl alloy at high temperature by in situ microcompression10.1016/j.actamat.2018.11.050 ↗
23. New insights into high-temperature deformation and phase transformation mechanisms of lamellar structures in high Nb-containing TiAl alloys10.1016/j.actamat.2020.01.021 ↗
24. Local mechanical properties of the (β0+ω0) composite in multiphase titanium aluminides studied with nanoindentation at room and high temperatures10.1016/j.msea.2016.04.026 ↗
25. Dislocation structures of B2 phase in Ti-42Al-6V-1Cr alloy deformed at room temperature and 800℃10.1016/j.jallcom.2019.01.172 ↗
26. Microstructure formation and columnar to equiaxed transition during cold crucible directional solidification of a high-Nb TiAl alloy10.1016/j.jmrt.2021.02.052 ↗
27. Fultz · 2007
28. The decomposition of the beta phase in Ti-44Al-8Nb and Ti-44Al-4Nb-4Zr-0.2Si alloys10.1016/S1359-6454(98)00113-X ↗
29. Structural stability and the alloying effect of TiB polymorphs in TiAl alloys10.1016/j.intermet.2017.07.002 ↗
30. High-temperature rotary-bending fatigue characteristics of a high Nb containing beta-gamma TiAl alloy10.1016/j.msea.2018.08.021 ↗
31. Fatigue behavior of additive manufactured 316L stainless steel under axial versus rotating-bending loading: synergistic effects of stress gradient, surface roughness, and volumetric defects10.1016/j.ijfatigue.2020.106063 ↗
32. Smooth and notch fatigue behavior of selectively laser melted Inconel 718 with as-built surfaces10.1016/j.ijfatigue.2019.105211 ↗
33. Wayne Jones, Effects of microstructure and temperature on fatigue crack growth in the TiAl alloy Ti-46.5A1-3Nb-2Cr-0.2W10.1016/0921-5093(94)03262-9 ↗
34. Effect of stress ratio on fatigue crack growth in TiAl intermetallics at room and elevated temperatures10.1016/S0921-5093(00)00958-8 ↗
35. Deformation twinning10.1016/0079-6425(94)00007-7 ↗
36. Twin and twin intersection phenomena in a creep deformed microalloyed directionally solidified high Nb containing TiAl alloy10.1016/j.jmst.2022.02.045 ↗
37. Twinning and twin intersections in γ grains of Ti-42.9Al-4.6Nb-2Cr10.1016/j.jmst.2021.01.047 ↗
38. Twin intersection in a deformed TiAl alloy10.1016/S1359-6462(01)01004-1 ↗
39. TEM investigation of twin intersection in a Ti-45Al-9Nb-2.5Mn alloy deformed at room temperature10.1016/S0966-9795(99)00135-1 ↗
40. Strengthening materials by engineering coherent internal boundaries at the nanoscale10.1126/science.1159610 ↗
41. Appel · 2011
42. Hard slip mechanisms in B2 CoTi10.1016/j.actamat.2011.11.061 ↗
43. Mechanical properties of single crystal YAg10.1016/j.actamat.2004.05.019 ↗
44. Revisiting intrinsic brittleness and deformation behavior of B2 NiAl intermetallic compound: a first-principles study10.1016/j.jmst.2017.11.038 ↗
45. Determination of slip systems and their relation to the high ductility and fracture toughness of the B2 DyCu intermetallic compound10.1016/j.actamat.2007.02.025 ↗
46. A simplified method for determining the number of independent slip systems in crystals10.1016/0956-716X(91)90036-Z ↗
47. A comparative analysis of low temperature deformation in B2 aluminides10.1016/S0921-5093(01)01163-7 ↗
48. Thermomechanical instability and deformation behavior of βo(ω) phase region in a Ti-43Al-8Nb-0.2W-0.2B alloy under high-temperature rotary-bending fatigue10.1016/j.ijfatigue.2022.106933 ↗
49. Room-temperature tensile properties of float-zone processed β-stabilized γ-TiAl(Nb, Cr, Zr) intermetallic10.1016/j.matlet.2016.10.103 ↗
50. High tensile ductility and strength in the Ti-42Al-6V-1Cr alloy10.1016/j.jallcom.2016.12.306 ↗
51. Role of growth rate on microstructure evolution, element distribution and nanohardness of phases in directionally solidified multiphase high-Nb TiAl alloy10.1016/j.jmrt.2021.08.104 ↗
52. Deformation mechanisms and slip transfer in a Ti-44A1-2Mo alloy10.1016/0921-5093(94)09711-9 ↗
53. Tuning mechanical properties for β(B2)-containing TiAl intermetallics10.1016/S1003-6326(11)61505-7 ↗
54. Slip transfer and dislocation nucleation processes in multiphase ordered Ni-Fe-Al alloys10.1007/s11661-999-0152-3 ↗
55. Microstructural studies of a Ni-W directionally solidified eutectic composite10.1007/BF02642297 ↗
56. Microstructure and nanomechanical behavior of individual phase in β-solidifying Ti-43Al-5Nb-35Cr-1Zr alloy10.1016/j.jmrt.2022.03.019 ↗
57. Strengthening of lamellar TiAl alloys by precipitation bands of ωo particles10.1016/j.msea.2008.08.050 ↗
58. Relationship between tensile and primary creep properties of near γ-TiAl intermetallics10.1016/S0966-9795(01)00090-5 ↗
59. Deformation twinning in TiAl: effects of defect clustering10.1007/BF03026128 ↗
60. Effect of Al content and Nb addition on the strength and fault energy of TiAl alloys10.1016/S0921-5093(01)01663-X ↗
61. Dissociation of super-dislocations and the stacking fault energy in TiAl based alloys with Nb-doping10.1016/j.physleta.2006.05.021 ↗
62. The role of structural ledges at phase boundaries – II. Fcc-bcc interfaces in nishiyama-wasserman orientation10.1016/0956-7151(94)90135-X ↗
63. Dislocation nucleation mechanisms from fcc/bcc incoherent interfaces10.1016/j.scriptamat.2011.09.008 ↗
64. Slip resistance of interfaces and the strength of metallic multilayer composites10.1016/j.scriptamat.2003.11.059 ↗
65. Enhancing strength and strain hardenability via deformation twinning in fcc-based high entropy alloys reinforced with intermetallic compounds10.1016/j.actamat.2018.12.010 ↗
66. LX, A mechanism for the growth of deformation twins in crystals10.1080/14786445108561272 ↗
67. Deformation of lamellar FCC-B2 nanostructures containing Kurdjumov-Sachs interfaces: relation between interfacial structure and plasticity10.1016/j.ijplas.2019.09.014 ↗
68. Microstructural origins of high strength and high ductility in an AlCoCrFeNi2.1 eutectic high-entropy alloy10.1016/j.actamat.2017.07.041 ↗