Effect of grain boundary segregation of Co or Ti on cyclic deformation of aluminium bi-crystals
Source abstract
Abstract
Abstract There exist many factors affecting fatigue behavior of metallic materials, among them the effect of grain boundary (GB) segregation of alloying elements remains largely unexplored. To exploit this factor, an atomistic simulation is performed to investigate the cyclic behavior of Al bi-crystals with GB segregation of Co or Ti during their mode I cyclic loading perpendicular to GB plane. Results are given in comparison with the case of pure Al bi-crystal. Detailed analysis of the structure evolution during cyclic loading for the considered bi-crystals is presented. It is found that during the cycling, plastic deformation of the pure Al bi-crystal occurs through perfect dislocation sliding followed by twinning, while the GB segregations inhibit the formation of both perfect dislocations and twins in an Al matrix leading to decrease in ductility of the bi-crystals and intergranular crack propagation rate. The cyclic loading of the samples with GB segregation is accompanied with a generation of plenty of Shockley partials. Both the alloying elements in GBs can improve the fatigue lifetime of the Al bi-crystals. The ability of GB segregations in bi-crystalline and polycrystalline Al to retard the dislocation emission from GBs that has been first theoretically revealed in the study could be successfully used to improve fatigue characteristics of metals, especially nanocrystalline metals with a dense GB network.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and mechanical properties · Aluminum Alloys Composites Properties · Aluminum Alloy Microstructure Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (75)
Show source-provided references
1. Mechanisms of fatigue crack growth – a critical digest of theoretical developments10.1111/ffe.12392 ↗
2. Valiev · 2014
3. Using high-pressure torsion for metal processing: fundamentals and applications10.1016/j.pmatsci.2008.03.002 ↗
4. Bulk nanostructured functional materials by severe plastic deformation10.1002/adem.201000119 ↗
5. Extreme grain refinement by severe plastic deformation: a wealth of challenging science10.1016/j.actamat.2012.10.038 ↗
6. Influence of processing regimes on fine-grained microstructure development in an AlMgSc alloy by hot equal-channel angular pressing10.2320/matertrans.MD201108 ↗
7. Effect of temperature on the formation of a microstructure upon equal-channel angular pressing of the Al-Mg-Sc 1570 alloy10.1134/S0031918X10080053 ↗
8. High-cycle fatigue behavior of an ultrafine-grained Ti–6Al–4V alloy processed by ECAP and extrusion10.1002/adem.201500630 ↗
9. Mechanical properties of Ti-6Al-4V titanium alloy with submicrocrystalline structure produced by severe plastic deformation10.2320/matertrans.46.2020 ↗
10. Fatigue behavior of ultrafine-grained Ti-6Al-4V 'ELI' alloy for medical applications10.1016/j.msea.2008.04.082 ↗
11. Nanostructuring of Ti-alloys by SPD processing to achieve superior fatigue properties10.3139/146.110234 ↗
12. Fatigue life and failure characteristics of an ultrafine-grained Ti-6Al-4V alloy processed by ECAP and extrusion10.1002/adem.201300530 ↗
13. An overview: fatigue behaviour of ultrafine-grained metals and alloys10.1016/j.ijfatigue.2005.08.014 ↗
14. Exceptional high fatigue strength in Cu-15at.%Al alloy with moderate grain size10.1038/srep27433 ↗
15. Atomistic mechanisms of fatigue in nanotwinned metals10.1016/j.actamat.2015.07.045 ↗
16. Mechanical behavior of nanocrystalline metals and alloys10.1016/j.actamat.2003.08.032 ↗
17. Modeling fatigue crack growth resistance of nanocrystalline alloys10.1016/j.actamat.2013.01.030 ↗
18. Effect of crystallographic orientation and grain boundary character on fatigue cracking behaviors of coaxial copper bicrystals10.1016/j.actamat.2012.08.045 ↗
19. Defect-interface interactions10.1016/j.pmatsci.2015.02.001 ↗
20. Thermomechanical treatment to achieve stable two-way shape memory strain without training in Ti-49.8 at.% Ni alloy10.1007/s00339-014-8345-z ↗
21. Influence of the structure of the Ti-49.8 at% Ni alloy on its thermal expansion during the martensitic phase transformation10.1134/S1063783412070050 ↗
22. Molecular dynamics simulation of crack growth under cyclic loading10.1016/j.commatsci.2004.03.009 ↗
23. Atomistic modelling of fatigue crack growth and dislocation structuring in FCC crystals10.1098/rspa.2006.1746 ↗
24. Atomistic mechanisms of fatigue in nanocrystalline metals10.1103/PhysRevLett.94.165502 ↗
25. Nanostructurally small cracks (NSC): a review on atomistic modeling of fatigue10.1016/j.ijfatigue.2010.01.006 ↗
26. An atomistic investigation into the nature of near threshold fatigue crack growth in aluminum alloys10.1016/j.engfracmech.2013.10.019 ↗
27. Atomistic aspects of fracture10.1007/s10704-015-9988-2 ↗
28. Molecular dynamics simulation of fatigue crack propagation in bcc iron under cyclic loading10.1016/j.ijfatigue.2014.04.010 ↗
29. Nonuniform elastic deformation of nanofilms formed from NiAl and FeAl alloys10.1007/s11182-014-0209-7 ↗
30. Strengthening of NiAl nanofilms by introducing internal stresses10.1016/j.intermet.2013.07.024 ↗
31. Discontinuous elastic strain observed during stretching of NiAl single crystal nanofilms10.1016/j.commatsci.2013.06.007 ↗
32. Inhomogeneous elastic deformation of nanofilms and nanowires of NiAl and FeAl alloys10.1134/S0021364013150058 ↗
33. Effect of temperature on inhomogeneous elastic deformation and negative stiffness of NiAl and FeAl alloy nanofilms10.1134/S1063783414060109 ↗
34. Negative stiffness of the FeAl intermetallic nanofilm10.1134/S1063783413090072 ↗
35. Mechanically driven grain boundary relaxation: a mechanism for cyclic hardening in nanocrystalline Ni10.1080/09500839.2011.619507 ↗
36. Grain boundary segregation, chemical ordering and stability of nanocrystalline alloys: atomistic computer simulations in the Ni-W system10.1016/j.actamat.2007.03.024 ↗
37. Stabilization and strengthening of nanocrystalline copper by alloying with tantalum10.1016/j.actamat.2012.01.011 ↗
38. Reaching theoretical strengths in nanocrystalline Cu by grain boundary doping10.1016/j.scriptamat.2011.06.048 ↗
39. Grain boundary doping strengthens nanocrystalline copper alloys10.1016/j.scriptamat.2012.06.031 ↗
40. Work hardening and inherent plastic instability of nanocrystalline metals10.1002/pssr.201004095 ↗
41. Plastic deformation of nanocrystalline Pd-Au alloys: on the interplay of grain boundary solute segregation, fault energies and grain size10.1016/j.actamat.2011.01.036 ↗
42. On the origin of the extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation10.1016/j.scriptamat.2010.07.014 ↗
43. Enhanced grain refinement of an Al-Mg-Si alloy by high-pressure torsion processing at 100 C10.1016/j.msea.2012.05.063 ↗
44. Molecular dynamics simulation-based cohesive zone representation of fatigue crack growth in a single crystal nickel10.1016/j.commatsci.2015.07.017 ↗
45. Molecular dynamics-based cohesive zone representation of microstructure and stress evolutions of nickel intergranular fracture process: effects of temperature10.1016/j.commatsci.2015.12.001 ↗
46. Molecular dynamic modelling of fatigue crack growth in aluminium using LEFM boundary conditions10.1016/j.ijfatigue.2012.05.005 ↗
47. Fatigue crack growth in magnesium single crystals under cyclic loading: molecular dynamics simulation10.1016/j.commatsci.2010.02.003 ↗
48. 3D atomistic studies of fatigue behaviour of edge crack (001) in bcc iron loaded in mode I and II10.1016/j.ijfatigue.2014.03.001 ↗
49. 3D atomistic simulation of fatigue behavior of a ductile crack in bcc iron loaded in mode II10.1016/j.commatsci.2012.03.045 ↗
50. Effect of grain boundary segregations of Fe Co, Cu, Ti, Mg and Pb on small plastic deformation of nanocrystalline Al10.1016/j.commatsci.2014.11.038 ↗
51. Effect of grain boundary segregation on the deformation mechanisms and mechanical properties of nanocrystalline binary aluminum alloys10.1016/j.commatsci.2016.02.013 ↗
52. Effect of grain boundary segregation on shear deformation of nanocrystalline binary aluminum alloys at room temperature10.4028/www.scientific.net/MSF.838-839.89 ↗
53. Elastic moduli of nanocrystalline binary Al alloys with Fe Co, Ti, Mg and Pb alloying elements10.1080/14786435.2016.1171416 ↗
54. Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy10.1155/2015/231848 ↗
55. Fast parallel algorithms for short-range molecular-dynamics10.1006/jcph.1995.1039 ↗
56. Embedded-atom method: derivation and application to impurities, surfaces, and other defects in metals10.1103/PhysRevB.29.6443 ↗
57. Interatomic potential for the ternary Ni–Al–Co system and application to atomistic modeling of the B2–L10 martensitic transformation10.1088/0965-0393/23/6/065006 ↗
58. Interatomic potentials for atomistic simulations of the Ti-Al system10.1103/PhysRevB.68.024102 ↗
59. Visualization and analysis of atomistic simulation data with OVITO – the Open Visualization Tool10.1088/0965-0393/18/1/015012 ↗
60. Automated identification and indexing of dislocations in crystal interfaces10.1088/0965-0393/20/8/085007 ↗
61. Dislocation-grain boundary interaction in <111> textured thin metal films10.1016/j.actamat.2010.05.037 ↗
62. Void growth by dislocation emission10.1016/j.actamat.2003.11.022 ↗
63. Dislocation emission from nanovoids in single-phase and composite nanocrystalline materials
64. Void growth by dislocation-loop emission10.1063/1.2710346 ↗
65. Nanovoid growth in nanocrystalline metal by dislocation shear loop emission10.1016/j.msea.2011.03.074 ↗
66. Detwinning mechanisms for growth twins in face centered cubic metals10.1016/j.actamat.2009.12.013 ↗
67. Mechanism-based crystal plasticity modeling of twin boundary migration in nanotwinned face-centered cubic metals10.1016/j.jmps.2014.03.006 ↗
68. The kinetics and energetics of dislocation mediated de-twinning in nanotwinned face-centered cubic metals10.1016/j.msea.2010.10.072 ↗
69. The influence of twins on the mechanical properties of nc-Al10.1016/j.actamat.2004.01.017 ↗
70. Dislocations emitted from nanocrystalline grain boundaries: nucleation and splitting distance10.1016/j.actamat.2004.09.001 ↗
71. Nucleation and propagation of dislocations in nanocrystalline fcc metals10.1016/j.actamat.2005.12.026 ↗
72. Accommodation processes during deformation of nanocrystalline palladium10.1016/j.actamat.2010.06.026 ↗
73. Deformation twinning in nanocrystalline materials10.1016/j.pmatsci.2011.05.001 ↗
74. Grain-boundary sliding in nanocrystalline fcc metals10.1103/PhysRevB.64.224105 ↗
75. Quantitative description of plastic deformation in nanocrystalline Cu: dislocation glide versus grain boundary sliding10.1103/PhysRevB.77.134108 ↗