Diffusional-displacive transformation in a metastable β titanium alloy and its strengthening effect
Source abstract
Abstract
Abstract Diffusional-displacive transformations are generally associated with mechanical properties of materials such as high strength. Understanding structure evolution of these transformations is of great interests from both physics and application perspectives. By combining atomic resolution electron microscopy, energy dispersive spectroscopy and first principles calculations, a continuous β→αʺ→α transformation process has been quantitatively characterized at the atomic level in a metastable β-Ti alloy during aging treatment. The transformation is revealed to develop by a novel mechanism involving continuous structural and compositional changes towards the equilibrium assisted by compositional fluctuation in the β matrix. Moreover, the product phase induces a precipitate-matrix lattice mismatch, thus produces a coherency strain field surrounding the precipitates. The coherent strain field contributes significantly to the increasing hardness of the alloy after aging. These results have great potential for tailoring thermomechanical treatment routes and improving mechanical properties of materials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Titanium Alloys Microstructure and Properties · Intermetallics and Advanced Alloy Properties · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (65)
Show source-provided references
1. Solid-state phase transformations
2. Lattice correspondence, atomic site correspondence and shape change in “diffusional-displacive” phase transformations10.1016/S0079-6425(97)00009-1 ↗
3. Coupling of displacive and replacive ordering10.1016/S0079-6425(97)00010-8 ↗
4. Crystallographic and mechanistic aspects of growth by shear and by diffusional processes10.1007/BF02646984 ↗
5. Atomic mechanisms of diffusional nucleation and growth and comparisons with their counterparts in shear transformations10.1007/BF02657313 ↗
6. Atomic structure, composition, mechanisms and dynamics of transformation interfaces in diffusional phase transformations10.2320/matertrans1989.39.3 ↗
7. Nanoprecipitation in a beta-titanium alloy10.1016/j.jallcom.2014.10.038 ↗
8. Perspectives on Titanium Science and Technology10.1016/j.actamat.2012.10.043 ↗
9. Mechanical biocompatibilities of titanium alloys for biomedical applications10.1016/j.jmbbm.2007.07.001 ↗
10. A review of shape memory alloy research, applications and opportunities10.1016/j.matdes.2013.11.084 ↗
11. Effect of precipitation on mechanical properties in the β-Ti alloy Ti-24Nb-4Zr-8Sn10.1016/j.msea.2015.12.024 ↗
12. Complexion-mediated martensitic phase transformation in Titanium10.1038/ncomms14210 ↗
13. α phase precipitation and mechanical properties of Nb-modified Ti-5553 alloy10.1016/j.msea.2016.06.001 ↗
14. β Phase decomposition in Ti-5Al-5Mo-5V-3Cr10.1016/j.actamat.2009.04.031 ↗
15. Micromechanics of Ti–10V–2Fe–3Al: In situ synchrotron characterisation and modelling10.1016/j.actamat.2007.08.049 ↗
16. Novel mixed-mode phase transition involving a composition-dependent displacive component10.1103/PhysRevLett.106.245701 ↗
17. Influence of fine scale alpha precipitation on the mechanical properties of the beta titanium alloy Beta-21S10.1007/s11661-015-2944-y ↗
18. Microstructure evolution during deformation of a near-α titanium alloy with different initial structures in the two-phase region10.1016/j.scriptamat.2009.04.033 ↗
19. Evidence of α-nanophase heterogeneous nucleation from ω particles in a β-metastable Ti-based alloy by high-resolution electron microscopy10.1016/j.scriptamat.2005.10.024 ↗
20. The indirect influence of the ω phase on the degree of refinement of distributions of the α phase in metastable β-Titanium alloys10.1016/j.actamat.2015.09.053 ↗
21. The role of cuboidal ω precipitates on α precipitation in a Ti-20V alloy10.1016/j.scriptamat.2016.06.004 ↗
22. Role of ω phase in the formation of extremely refined intragranular α precipitates in metastable β-titanium alloys10.1016/j.actamat.2015.11.020 ↗
23. ω- Assisted nucleation and growth of α precipitates in the Ti-5Al-5Mo-5V-3Cr-0.5Fe β titanium alloy10.1016/j.actamat.2009.01.007 ↗
24. Phase transformations in Ti-Mo and Ti-V alloys
25. Influence of misfit on morphology and stability of omega phase in titanium-transition metal alloys
26. Phase transformations in Ti-6.8Mo-4.5Fe-1.5Al10.1007/s11661-998-0217-8 ↗
27. The mechanism of ω-assisted α phase formation in near β-Ti alloys10.1016/j.scriptamat.2015.04.007 ↗
28. ω-Assisted α nucleation in a metastable β titanium alloy10.1016/j.scriptamat.2019.06.020 ↗
29. Non-classical homogeneous precipitation mediated by compositional fluctuations in titanium alloys10.1016/j.actamat.2012.07.033 ↗
30. Pseudospinodal mechanism for fine α/β microstructures in β-Ti alloys10.1016/j.actamat.2013.10.026 ↗
31. Giant thermal expansion and alpha-precipitation pathways in Ti-alloys10.1038/s41467-017-01578-1 ↗
32. Tracking the αʺ martensite decomposition during continuous heating of a Ti-6Al-6V-2Sn alloy10.1016/j.actamat.2017.06.018 ↗
33. Ductile titanium alloy with low Poisson's ratio10.1103/PhysRevLett.98.216405 ↗
34. Orientation and phase mapping in the transmission electron microscope using precession-assisted diffraction spot recognition: state-of-the-art results10.1111/jmi.12065 ↗
35. Strain mapping at the nanoscale using precession electron diffraction in transmission electron microscope with off axis camera10.1063/1.4901435 ↗
36. bcc-to-hcp transformation pathways for iron versus hydrostatic pressure: coupled shuffle and shear modes10.1103/PhysRevB.79.134113 ↗
37. On the process of transition of the cubic-body-centered modification into the hexagonal-close-packed modification of zirconium10.1016/S0031-8914(34)80244-3 ↗
38. Transition of dislocation nucleation induced by local stress concentration in nanotwinned copper10.1038/ncomms8648 ↗
39. Lattice distortion analysis directly from high resolution transmission electron microscopy imagesdthe LADIA program package
40. Reversible displacive transformation with continuous transition interface in a metastable β titanium alloy10.1016/j.actamat.2019.05.045 ↗
41. Superelasticity and tunable thermal expansion across a wide temperature range10.1016/j.jmst.2016.06.017 ↗
42. The effect of alloy composition on instabilities in the β phase of titanium alloys10.1016/j.scriptamat.2016.01.024 ↗
43. Characterization of a previously unidentified ordered orthorhombic metastable phase in Ti-5Al-5Mo-5V-3Cr10.1016/j.scriptamat.2015.10.037 ↗
44. Nano-scale structural non-uniformities in gum like Ti-24Nb-4Zr-8Sn metastable β-Ti alloy10.1016/j.scriptamat.2018.08.043 ↗
45. Shuffle-nanodomain regulated strain glass transition in Ti-24Nb-4Zr-8Sn alloy10.1016/j.actamat.2019.12.056 ↗
46. The influence of aluminum and oxygen additions on intrinsic structural instabilities in titanium-molybdenum alloys10.1016/j.scriptamat.2018.04.030 ↗
47. A nano-scale instability in the β phase of dilute Ti-Mo alloys10.1016/j.scriptamat.2016.01.044 ↗
48. Khachaturian · 2013
49. Concentration waves and Fermi surfaces in random metallic alloys10.1103/PhysRevLett.50.374 ↗
50. Tuning element distribution, structure and properties by composition in high-entropy alloys10.1038/s41586-019-1617-1 ↗
51. Compatibility and accommodation in displacive phase transformations10.1016/j.pmatsci.2011.01.003 ↗
52. The role of disconnections in phase transformations10.1016/j.pmatsci.2009.04.001 ↗
53. Determination of the structure of α-β interfaces in metastable β-Ti alloys10.1016/j.actamat.2018.03.003 ↗
54. Quantitative measurement of displacement and strain fields from HREM micrographs10.1016/S0304-3991(98)00035-7 ↗
55. Measurement of the displacement field of dislocations to 0.03 Å by electron microscopy10.1038/nature01638 ↗
56. From chessboard tweed to chessboard nanowire structure during pseudospinodal decomposition10.1038/nmat2431 ↗
57. Precipitation hardening10.1007/BF02670416 ↗
58. Ultrastrong steel via minimal lattice misfit and high-density nanoprecipitation10.1038/nature22032 ↗
59. Precipitation strengthening in an ultralight magnesium alloy10.1038/s41467-019-08954-z ↗
60. Predicting equilibrium shape of precipitates as function of coherency state10.1016/j.actamat.2012.04.019 ↗
61. Phase transformations during cooling in α+β titanium alloys10.1016/S0921-5093(97)00802-2 ↗
62. Variant selection of grain boundary α by special prior β grain boundaries in titanium alloys10.1016/j.actamat.2014.05.003 ↗
63. Kar · 2005 · 1 · 133
64. Routes to control diffusive pathways and thermal expansion in Ti-alloys10.1038/s41598-020-60038-x ↗
65. Tracing the coupled atomic shear and shuffle for a cubic to a hexagonal crystal transition10.1016/j.scriptamat.2017.02.024 ↗