Grain boundary engineering during the laser powder bed fusion of TiC/316L stainless steel composites: New mechanism for forming TiC-induced special grain boundaries
Source abstract
Abstract
In this work, we demonstrate a novel machining solution for controlling microstructures with special grain boundaries and nanotwins in composites during laser powder bed fusion (LPBF) that is based on a composite design of TiC/316L stainless steel (TiC/316LSS). Moreover, a microscopic mechanism is proposed. Gradient element segregation toward the amorphous TiC interface induces a low stacking fault energy (SFE), driven by the residual stress generated during LPBF thermal cycling, and 9R formed at the TiC interface with a low SFE and transformed to nanotwins. The migration of the incoherent twin boundary regenerates a high proportion of special grain boundaries. Based on the mechanistic analysis, the evolution of the microstructure, including TiC nanoparticle agglomeration, grain refinement and special grain boundaries in the microstructure, is well explained by optimizing the laser power, scanning speed and hatch spacing. TiC/316LSS composite with improved characteristics are observed, including a local residual stress decrease and grain refinement, which are notably superior to those of conventional thermomechanically treated 316LSS. The composite possesses a high proportion of special grain boundaries and nanotwins that maintain wall strengthening via an ultrafine dislocation cell structure produced during LPBF. Microstructural control is realized in additive manufacturing (AM) by predictably adjusting the process parameters. Thus, additive manufacturing grain boundary engineering (AM-GBE) shows great potential due to growth twinning and special grain boundary regeneration by optimizing the LPBF parameters and segregation-induced design.
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Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High Entropy Alloys Studies · Additive Manufacturing and 3D Printing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (70)
Show source-provided references
1. Material-structure-performance integrated laser-metal additive manufacturing10.1126/science.abg1487 ↗
2. Additive manufacturing of multi-directional preforms for composites: opportunities and challenges10.1016/j.mattod.2015.05.001 ↗
3. In-situ sensing, process monitoring and machine control in laser powder bed fusion: a review
4. Microstructural origin of the anisotropic flow stress of laser powder bed fused AlSi10Mg10.1016/j.actamat.2021.117346 ↗
5. Coarsening of martensite with multiple generations of twins in laser additively manufactured Ti6Al4V10.1016/j.actamat.2021.116954 ↗
6. Creep deformation and failure properties of 316 L stainless steel manufactured by laser powder bed fusion under multiaxial loading conditions
7. Numerical prediction of grain structure formation during laser powder bed fusion of 316 L stainless steel10.1016/j.matdes.2020.109434 ↗
8. Comparison of the microstructure, mechanical properties and distortion of stainless steel 316 L fabricated by micro and conventional laser powder bed fusion
9. Fatigue strength of additively manufactured 316 L austenitic stainless steel10.1016/j.actamat.2020.08.033 ↗
10. Microstructure and mechanical properties of TiN particles strengthened 316 L steel prepared by laser melting deposition process10.1016/j.msea.2021.141220 ↗
11. Corrosion behaviour of 316 stainless steel in NaCl-KCl-MgCl2 salt vapour at 700 °C10.1016/j.corsci.2021.109921 ↗
12. Microstructure and corrosion behaviour of 316 L-IN625 functionally graded materials via laser metal deposition10.1016/j.corsci.2021.109876 ↗
13. Investigation of microstructure, tribological and corrosion properties of AISI 316 L stainless steel matrix composites reinforced by carbon nanotubes
14. Unraveling the origin of twin related domains and grain boundary evolution during grain boundary engineering10.1016/j.actamat.2017.10.007 ↗
15. Twin-induced grain boundary engineering for 316 austenitic stainless steel10.1016/j.actamat.2006.06.030 ↗
16. Improve the ductility of a nickel-based superalloy by optimizing secondary phase distribution through grain boundary engineering10.1016/j.matchar.2021.111510 ↗
17. Mitigation of hydrogen embrittlement in alloy custom age 625 PLUS® via grain boundary engineering10.1016/j.msea.2021.141377 ↗
18. Suppression of liquid-metal-embrittlement by twin-induced grain boundary engineering approach10.1016/j.mtla.2020.100668 ↗
19. Suppression of intergranular corrosion by surface grain boundary engineering of 304 austenitic stainless steel using laser peening plus annealing
20. A possibility to synchronously improve the high-temperature strength and ductility in face-centered cubic metals through grain boundary engineering10.1016/j.scriptamat.2020.06.026 ↗
21. Recrystallization-based grain boundary engineering of 316 L stainless steel produced via selective laser melting10.1016/j.actamat.2020.09.015 ↗
22. Control of deformation and annealing process to produce incoherent Σ3 boundaries in Hastelloy C-276 alloy
23. Effect of nitrogen on grain boundary character distribution in 316 stainless steel10.1016/j.matlet.2021.129387 ↗
24. New insights on cellular structures strengthening mechanisms and thermal stability of an austenitic stainless steel fabricated by laser powder-bed-fusion10.1016/j.actamat.2020.11.018 ↗
25. Heterophase interface-mediated formation of nanotwins and 9R phase in aluminum: underlying mechanisms and strengthening effect10.1016/j.actamat.2019.05.053 ↗
26. Deformation twinning-induced dynamic recrystallization during laser powder bed fusion10.1016/j.scriptamat.2021.114307 ↗
27. Tailoring mechanical properties of a CoCrNi medium-entropy alloy by controlling nanotwin-HCP lamellae and annealing twins10.1016/j.msea.2018.11.143 ↗
28. Investigation of nanotwins in the bimodal-structured Fe22Co22Ni20Cr22Mn14 alloy subjected to high-strain-rate deformation at cryogenic temperatures10.1016/j.matchar.2020.110667 ↗
29. Martensitic transformation within nanotwins enhances fatigue damage resistance of a nanotwinned austenitic stainless steel10.1016/j.scriptamat.2021.114313 ↗
30. Grain boundary engineering and its implications on corrosion behavior of equiatomic CoCrFeMnNi high entropy alloy10.1016/j.jallcom.2021.161500 ↗
31. Tuning strength-ductility combination on selective laser melted 316 L stainless steel through gradient heterogeneous structure
32. Selective laser melting of 24CrNiMo steel for brake disc: fabrication efficiency, microstructure evolution, and properties10.1016/j.optlastec.2018.05.033 ↗
33. The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 28210.1016/j.matdes.2021.109725 ↗
34. Origin of dislocation structures in an additively manufactured austenitic stainless steel 316 L10.1016/j.actamat.2020.07.063 ↗
35. In-situ formation of TiC nanoparticles in selective laser melting of 316 L with addition of micronsized TiC particles10.1016/j.msea.2021.142179 ↗
36. Effects of ion irradiation on microstructure of 316 L stainless steel strengthened by disperse nano TiC through selective laser melting10.1016/j.matchar.2021.111420 ↗
37. Effect of dynamic evolution of misfit dislocation pattern on dislocation nucleation and shear sliding at semi-coherent bimetal interfaces10.1016/j.actamat.2017.10.012 ↗
38. New insights on cellular structures strengthening mechanisms and thermal stability of an austenitic stainless steel fabricated by laser powder-bed-fusion10.1016/j.actamat.2020.11.018 ↗
39. Effects of alloying elements concentrations and temperatures on the stacking fault energies of Co-based alloys by computational thermodynamic approach and first-principles calculations10.1016/j.jallcom.2016.10.113 ↗
40. Grain boundary character and stress corrosion cracking behavior of Co-Cr alloy fabricated by selective laser melting10.1016/j.jmst.2021.03.063 ↗
41. Shockley partial dislocations to twin: another formation mechanism and generic driving force10.1063/1.1835549 ↗
42. Shear response of Σ3 {112} twin boundaries in face-centered-cubic metals10.1103/PhysRevB.83.064106 ↗
43. Role of heat treatment and build orientation in the microstructure sensitive deformation characteristics of IN718 produced via SLM additive manufacturing
44. Grain boundary network evolution in Inconel 718 from selective laser melting to heat treatment10.1016/j.msea.2018.04.045 ↗
45. Slip transmission assisted by Shockley partials across α/β interfaces in Ti-alloys10.1016/j.actamat.2019.04.013 ↗
46. Kinetics of annealing-induced detwinning in chemical vapor deposited nickel10.1016/j.actamat.2019.08.010 ↗
47. Formation of stress-induced 9R structure in a hot-deformed Ti-45Al-10Nb alloy10.1016/S1359-6462(97)00089-4 ↗
48. In situ study of defect migration kinetics and self-healing of twin boundaries in heavy ion irradiated nanotwinned metals10.1021/nl504677z ↗
49. Phase transformation of Cu precipitates from bcc to fcc in Fe–3Si–2Cu alloy10.1016/j.actamat.2012.09.068 ↗
50. The influence of grain boundary inclination on the structure and energy of σ = 3 grain boundaries in copper10.1080/01418619208248003 ↗
51. Dislocation structures of Σ3 {112} twin boundaries in face centered cubic metals10.1063/1.3176979 ↗
52. Detwinning mechanisms for growth twins in face-centered cubic metals10.1016/j.actamat.2009.12.013 ↗
53. Effect of subgrain and the associated DRX behaviour on the texture modification of Mg-6.63Zn-0.56Zr alloy during hot tensile deformation10.1016/j.msea.2021.141745 ↗
54. Theory of dislocations10.1016/0502-8205(49)90004-0 ↗
55. Twinning pathways in Fe and Fe–Cr alloys from first-principles theory10.1016/j.actamat.2021.117094 ↗
56. A molecular dynamics study of dislocation ejection and shear coupling associated with incoherent twin boundary migration10.1016/j.mtla.2021.101111 ↗
57. Dislocation transmission across Σ3{112} incoherent twin boundary: a combined atomistic and phase-field study
58. Enhanced resistance to fatigue crack propagation in metastable austenitic stainless steel by nanotwin bundles10.1016/j.scriptamat.2021.113976 ↗
59. High-velocity projectile impact induced 9R phase in ultrafine-grained aluminium10.1038/s41467-017-01729-4 ↗
60. Detwinning, damage and crack initiation during cyclic loading of Cu samples containing aligned nanotwins10.1016/j.actamat.2011.04.002 ↗
61. Simultaneously minimizing residual stress and enhancing strength of selective laser melted nano-TiB2 decorated Al alloy via post-uphill quenching and ageing10.1016/j.matchar.2021.111242 ↗
62. Suppression of intergranular corrosion by surface grain boundary engineering of 304 austenitic stainless steel using laser peening plus annealing
63. Dislocation arrangement and residual long-range internal stresses in copper single crystals at large deformations10.1016/S1359-6454(96)00155-3 ↗
64. Effect of subgrain and the associated DRX behaviour on the texture modification of10.1016/j.actamat.2004.05.031 ↗
65. Dislocation interactions at the grain boundary in FCC bicrystals: an atomistically-informed dislocation dynamics study10.1016/j.actamat.2021.117455 ↗
66. Determination of minimal energy facet structures in Σ3 and Σ9 grain boundaries: experiment and simulation10.1016/j.mtla.2019.100221 ↗
67. Improve the ductility of a nickel based superalloy by optimizing secondary phase distribution through grain boundary engineering10.1016/j.matchar.2021.111510 ↗
68. Strain-annealed” grain boundary engineering process investigated in Hastelloy-X10.1016/j.mtla.2019.100544 ↗
69. Transition of dislocation nucleation induced by local stress concentration in nanotwinned copper10.1038/ncomms8648 ↗
70. Atomic scale characterization of complex stacking faults and their configurations in cold deformed Fe42Mn38Co10Cr10 high-entropy alloy10.1016/j.actamat.2020.07.070 ↗