On the deformation twinning mechanisms in twinning-induced plasticity steel
Source abstract
Abstract
Abstract Deformation twinning in coarse-grained fcc metals results from the highly coordinated glide of Shockley partial dislocations with the same Burgers vector on successive {111}-type twinning planes. The main issue of the formation mechanism of deformation twinning is how the arrangement of Shockley partials required for twinning evolves. Here, we present the deformation twinning mechanism that operates in Fe-17Mn-0.45C-1.5Al-1Si TWIP steel by means of in-situ TEM deformation tests and post-mortem TEM characterization. The in-situ TEM observation shows the formation of a thin twin by Shockley partial dislocations generated in a grain boundary, which indicates the nucleation of deformation twins at grain boundary defect sites. The observed twinning process is similar to deformation twinning in nano-crystalline materials through successive emission of partial dislocations from grain boundaries. In addition, a high density of Frank partial dislocations is observed inside deformations twins. These defects affect the growth of deformation twins and could contribute to the high work hardening of TWIP steel.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and mechanical properties · Microstructure and Mechanical Properties of Steels · Metal Alloys Wear and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
Show source-provided references
1. Deformation twinning10.1016/0079-6425(94)00007-7 ↗
2. Dislocations and twinning in face centred cubic crystals10.1016/S1572-4859(07)80007-6 ↗
3. Deformation twinning in nanocrystalline materials10.1016/j.pmatsci.2011.05.001 ↗
4. New deformation twinning mechanism generates zero macroscopic strain in nanocrystalline metals10.1103/PhysRevLett.100.095701 ↗
5. Twinning mechanism via synchronized activation of partial dislocations in face-centered-cubic materials10.1016/j.scriptamat.2011.01.016 ↗
6. Growth twins and deformation twins in metals10.1146/annurev-matsci-070813-113304 ↗
7. Critique of mechanisms of formation of deformation, annealing and growth twins: face-centered cubic metals and alloys10.1016/j.scriptamat.2012.09.011 ↗
8. Formation of deformation twins in f.c.c crystals10.1016/0001-6160(73)90085-0 ↗
9. Deformation twinning in face-centered cubic metals10.1080/14786436108235892 ↗
10. A dislocation model for twinning in f.c.c. metals10.1016/0001-6160(63)90074-9 ↗
11. A formation mechanism of mechanical twins in F.C.C. metals10.1016/0036-9748(75)90476-7 ↗
12. Miura · Trans. Jpn. Inst. Met. · 1968 · 9 · 555
13. Deformation twinning in Al-4.8 wt% Mg10.1016/0001-6160(88)90242-8 ↗
14. Application of a dislocation density-based constitutive model to Al-alloyed TWIP steel10.1007/s11661-013-1771-2 ↗
15. Stacking fault energy and deformation mechanisms in Fe-xMn-0.6C-yAl TWIP steel10.1016/j.msea.2016.08.106 ↗
16. A probabilistic twin nucleation model for HCP polycrystalline metals10.1098/rspa.2009.0661 ↗
17. High Mn TWIP steels for automotive applications
18. High manganese austenitic twinning induced plasticity steels: a review of the microstructure properties relationships10.1016/j.cossms.2011.04.002 ↗
19. Modeling of TWIP effect on work-hardening10.1016/S0921-5093(00)02019-0 ↗
20. Deformation of single crystal hadfield steel by twinning and slip10.1016/S1359-6454(99)00383-3 ↗
21. Direct observation of the twinning mechanism in an austenitic Fe–Mn–C steel10.1016/j.scriptamat.2009.03.045 ↗
22. On the mechanism of twin formation in Fe–Mn–C TWIP steels10.1016/j.actamat.2009.12.032 ↗
23. Transmission electron microscopy observation of a deformation twin in TWIP steel by anex situtensile test10.1080/14786435.2011.600736 ↗
24. An effective stacking fault energy viewpoint on the formation of extended defects and their contribution to strain hardening in a Fe–Mn–Si–Al twinning-induced plasticity steel10.1016/j.actamat.2014.12.015 ↗
25. Grain size effect on strain hardening in twinning-induced plasticity steels10.1016/j.scriptamat.2012.01.037 ↗
26. Williams · 1996
27. Stacking fault energy in silicon10.1063/1.1728570 ↗
28. Effect of Al on the stacking fault energy of Fe–18Mn–0.6C twinning-induced plasticity10.1016/j.scriptamat.2011.05.014 ↗
29. The effects of Si on the mechanical twinning and strain hardening of Fe–18Mn–0.6C twinning-induced plasticity steel10.1016/j.actamat.2013.02.031 ↗
30. The influence of manganese content on the stacking fault and austenite/ε-martensite interfacial energies in Fe–Mn–(Al–Si) steels investigated by experiment and theory10.1016/j.actamat.2014.01.001 ↗
31. Effects of Al on microstructure and tensile properties of C-bearing high Mn TWIP steel10.1016/j.actamat.2011.12.004 ↗
32. On the relationship between work hardening and twinning rate in TWIP steels10.1016/j.msea.2012.01.123 ↗
33. Physics and phenomenology of strain hardening : the FCC case10.1016/S0079-6425(02)00003-8 ↗
34. Constitutive modeling of the tensile behavior of Al-TWIP steel10.1007/s11661-011-0898-2 ↗
35. The effect of grain size on the twin initiation stress in a TWIP steel10.1016/j.actamat.2015.02.008 ↗
36. Softening of nanocrystalline metals at very small grain sizes10.1038/35328 ↗
37. Dislocation processes in the deformation of nanocrystalline aluminium by molecular-dynamics simulation10.1038/nmat700 ↗
38. Stacking fault energies and slip in nanocrystalline metals10.1038/nmat1136 ↗
39. Atomic mechanism for dislocation emission from nanosized grain boundaries10.1103/PhysRevB.66.024101 ↗
40. Partial-dislocation-mediated processes in nanocrystalline Ni with nonequilibrium grain boundaries10.1063/1.2227639 ↗
41. Stacking fault emission from grain boundaries: material dependencies and grain size effects10.1016/j.msea.2014.02.030 ↗
42. Emission of partial dislocations from triple junctions of grain boundaries in nanocrystalline materials10.1088/0022-3727/38/21/013 ↗
43. Twinning partial multiplication at grain boundary in nanocrystalline fcc metals10.1063/1.3187539 ↗
44. Evidencing extrinsic stacking faults in twinning-induced plasticity steel10.1016/j.matchar.2016.11.039 ↗
45. Generation of nanoscale deformation twins at locally distorted grain boundaries in nanomaterials10.1016/j.ijplas.2014.06.005 ↗
46. On the relationship between the twin internal structure and the work-hardening rate of TWIP steels10.1016/j.scriptamat.2010.07.016 ↗