The evolution of local stress during deformation twinning in a Mg-Gd-Y-Zn alloy
Source abstract
Abstract
Abstract In this study, we perform in-situ tensile testing and high-resolution electron backscatter diffraction (HR-EBSD) to monitor the twin local stresses at different stages: (i) before twinning, (ii) twins that have propagated into the parent crystal, and (iii) thickening of the twin lamella. The resolved shear stress (RSS) at the twin interface is calculated during deformation twinning, which indicates that the RSS evolution is a dynamic process. Negative shear stress is observed during the propagation stage, which provides evidence for the twinning shear transformation-induced stress reversal. Furthermore, a local Schmid factor (LSF) is used to evaluate the extent to which the local stress is dominated by the RSS on the identified twin plane. The experimental results indicate that the LSFs evolve with strain and are at their maximum level before twinning. The initiated twins are correlated with the highest LSFs compared with the unactivated variants. In addition, the product of the Luster Morris m′ value times the LSF of the twin variant may reveal a threshold for the slip-induced twinning process.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties · Hydrogen Storage and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (55)
Show source-provided references
1. Processing magnesium at room temperature10.1126/science.aax9732 ↗
2. Designing a magnesium alloy with high strength and high formability10.1038/s41467-018-04981-4 ↗
3. The origins of high hardening and low ductility in magnesium10.1038/nature15364 ↗
4. Designing high ductility in magnesium alloys10.1016/j.actamat.2019.04.019 ↗
5. Accommodation and formation of {1¯012} twins in Mg-Y alloys10.1016/j.actamat.2020.116514 ↗
6. Why are {101¯2} twins profuse in magnesium?10.1016/j.actamat.2014.11.033 ↗
7. Deformation twinning and grain partitioning in a hexagonal close-packed magnesium alloy10.1038/s41467-018-07028-w ↗
8. Effect of local stress fields on twin characteristics in HCP metals10.1016/j.actamat.2016.06.042 ↗
9. Numerical study of the stress state of a deformation twin in magnesium10.1016/j.actamat.2014.10.048 ↗
10. Tilt boundaries and associated solute segregation in a Mg–Gd alloy10.1016/j.actamat.2016.12.032 ↗
11. Strain hardening due to {10 12} twinning in pure magnesium10.1080/14786430701881211 ↗
12. Investigations of dislocation-type evolution and strain hardening during mechanical twinning in Fe-22Mn-0.6C twinning-induced plasticity steel10.1016/j.actamat.2020.05.062 ↗
13. Activation mode dependent {10−12} twinning characteristics in a polycrystalline magnesium alloy10.1016/j.scriptamat.2009.10.027 ↗
14. Variant selection of primary, secondary and tertiary twins in a deformed Mg alloy10.1016/j.actamat.2012.01.014 ↗
15. Variant selection during secondary twinning in Mg–3%Al10.1016/j.actamat.2010.03.027 ↗
16. The role of strain accommodation during the variant selection of primary twins in magnesium10.1016/j.actamat.2010.12.005 ↗
17. Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium10.1016/j.actamat.2017.03.017 ↗
18. Basal slip mediated tension twin variant selection in magnesium WE43 alloy10.1016/j.actamat.2019.03.018 ↗
19. Towards high ductility in magnesium alloys - the role of intergranular deformation10.1016/j.ijplas.2019.07.014 ↗
20. Revealing slip-induced extension twinning behaviors dominated by micro deformation in a magnesium alloy10.1016/j.ijplas.2020.102669 ↗
21. Slip-twinning interdependent activation across phase boundaries: an in-situ investigation of a Ti-Al-V-Fe (α+β) alloy10.1016/j.actamat.2020.116520 ↗
22. Tension-compression asymmetry and the underlying slip/twinning activity in extruded Mg–Y sheets10.1016/j.ijplas.2020.102878 ↗
23. Twin nucleation by slip transfer across grain boundaries in commercial purity titanium10.1007/s11661-009-0097-6 ↗
24. Anomalous tension twinning activity in extruded mg sheet during hard-orientation loading at room temperature10.1007/s11661-020-06093-5 ↗
25. Disconnections and other defects associated with twin interfaces10.1016/j.pmatsci.2016.07.003 ↗
26. In situ characterization of twin nucleation in pure Ti using 3D-XRD10.1007/s11661-013-2082-3 ↗
27. Study of 3-D stress development in parent and twin pairs of a hexagonal close-packed polycrystal: part I – in-situ three-dimensional synchrotron X-ray diffraction measurement10.1016/j.actamat.2015.04.020 ↗
28. Pure-shuffle nucleation of deformation twins in hexagonal-close-packed metals10.1080/21663831.2013.792019 ↗
29. Cyclic deformation and fatigue damage in single-crystal magnesium under fully reversed strain-controlled tension–compression in the [101¯0] direction10.1016/j.scriptamat.2014.10.020 ↗
30. Assessment of residual stress fields at deformation twin tips and the surrounding environments10.1016/j.actamat.2015.11.036 ↗
31. Hydrogen-assisted failure in a twinning-induced plasticity steel studied under in situ hydrogen charging by electron channeling contrast imaging10.1016/j.actamat.2013.04.030 ↗
32. Simulation of deformation twins and their interactions with cracks10.1016/j.commatsci.2014.03.041 ↗
33. The role of double twinning on transgranular fracture in magnesium AZ61 in a localized stress field10.1016/j.actamat.2015.09.026 ↗
34. Slip band–grain boundary interactions in commercial-purity titanium10.1016/j.actamat.2014.05.015 ↗
35. Evolution of intragranular stresses and dislocation densities during cyclic deformation of polycrystalline copper10.1016/j.actamat.2015.04.031 ↗
36. Stress fields and geometrically necessary dislocation density distributions near the head of a blocked slip band10.1016/j.actamat.2012.07.004 ↗
37. A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium10.1038/s41598-020-59684-y ↗
38. In situ micromechanical testing of tungsten micro-cantilevers using HR-EBSD for the assessment of deformation evolution10.1016/j.matdes.2016.12.052 ↗
39. High-resolution elastic strain measurement from electron backscatter diffraction patterns: new levels of sensitivity10.1016/j.ultramic.2005.10.001 ↗
40. Determination of elastic strain fields and geometrically necessary dislocation distributions near nanoindents using electron back scatter diffraction10.1080/14786430903304145 ↗
41. Strain mapping using electron backscatter diffraction
42. {101¯2} Twinning mechanism during in situ micro-tensile loading of pure Mg: role of basal slip and twin-twin interactions10.1016/j.matdes.2020.109206 ↗
43. On the deformation twinning of Mg AZ31B: a three-dimensional synchrotron X-ray diffraction experiment and crystal plasticity finite element model10.1016/j.ijplas.2015.03.001 ↗
44. Growth of {112¯2} twins in titanium: a combined experimental and modeling investigation of the local state of deformation10.1016/j.actamat.2016.12.066 ↗
45. Deformation twinning in rolled WE43-T5 rare earth magnesium alloy: influence on strain hardening and texture evolution10.1016/j.actamat.2017.03.075 ↗
46. Anomalous effects of strain rate on the room-temperature ductility of a cast Mg-Gd-Y-Zr alloy10.1016/j.actamat.2018.08.013 ↗
47. The effect of high yttrium solute concentration on the twinning behavior of magnesium alloys10.1016/j.actamat.2014.09.022 ↗
48. Precise measurement of strain accommodation in a Mg-Gd-Y-Zn alloy using cross-correlation-based high resolution EBSD10.1016/j.matchar.2020.110384 ↗
49. High resolution electron backscatter diffraction measurements of elastic strain variations in the presence of larger lattice rotations10.1016/j.ultramic.2012.01.004 ↗
50. Simmons · 1971
51. Nucleation and propagation of {101¯2} twins in AZ31 magnesium alloy10.1016/j.actamat.2015.08.024 ↗
52. 3 - Twinning and its role in wrought magnesium alloys
53. Compatibility of deformation in two-phase Ti-Al alloys: dependence on microstructure and orientation relationships10.1007/BF02670762 ↗
54. How magnesium accommodates local deformation incompatibility: a high-resolution digital image correlation study10.1016/j.actamat.2017.05.040 ↗
55. Local microstructure and micromechanical stress evolution during deformation twinning in hexagonal polycrystals10.1557/jmr.2020.14 ↗