Local residual stresses and microstructure within recrystallizing grains in iron

Zhang, Yubin; Yu, Tao; Xu, Ruqing; Thorborg, Jesper; Liu, Wenjun; Tischler, J. Z.; Godfrey, A.; Jensen, D. Juul

doi:10.1016/j.matchar.2022.112113

Cited by 24 publications

(10 citation statements)

References 59 publications

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“…With increasing deformation, the KAM of R3 alloy decreases compared with that of R2 because the proportion of R3 recrystallization increases. Recrystallization consumes some of the dislocations [45]. In addition, the grain size increases slightly due to the synergistic depletion effect of continuous DRXed and dynamic recovery.…”

Section: Discussionmentioning

confidence: 99%

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

et al. 2023

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The use of zinc (Zn) alloys as a biodegradable metal for medical purposes has been a popular research topic. This study investigated the strengthening mechanism of Zn alloys to enhance their mechanical properties. Three Zn-0.45Li (wt.%) alloys with different deformation amounts were prepared by rotary forging deformation. Their mechanical properties and microstructures were tested. A simultaneous increase in strength and ductility was observed in the Zn-0.45Li alloys. Grain refinement occurred when the rotary forging deformation reached 75.7%. The surface average grain size reached 1.19 ± 0.31 μm, and the grain size was uniformly distributed. Meanwhile, the maximum elongation of the deformed Zn-0.45Li was 139.2 ± 18.6%, and the ultimate tensile strength reached 426.1 ± 4.7 MPa. In situ tensile tests showed that the reinforced alloys still broke from the grain boundary. Continuous and discontinuous dynamic recrystallization during severe plastic deformation produced many recrystallized grains. During deformation, the dislocation density of the alloy first increased and then decreased, and the texture strength of the (0001) direction increased with deformation. Analysis of the mechanism of alloy strengthening showed that the strength and plasticity enhancement of Zn-Li alloys after macro deformation was a combination of dislocation strengthening, weave strengthening, and grain refinement rather than only fine-grain strengthening as observed in conventional macro-deformed Zn alloys.

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Section: Discussionmentioning

confidence: 99%

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

et al. 2023

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“…In the past two decades, non-destructive 3D OM methods without serial sectioning have been proposed using third-generation synchrotron-based x-ray diffraction and imaging techniques such as diffraction contrast tomography (DCT), [3][4][5][6][7] 3D x-ray diffraction (3DXRD) microscopy, [8][9][10][11][12][13][14][15][16][17][18][19][20][21] high-energy diffraction microscopy (HEDM), [22][23][24][25][26][27][28][29][30][31][32][33][34] scanning 3DXRD, [35][36][37][38][39][40][41][42] and differential-aperture x-ray diffraction microscopy (DAXM). [43][44][45][46][47][48][49][50] DAXM enables 3D OM by using a focused polychromatic x-ray beam, scanning a ...…”

Section: In-situ Tensile Tester For Scanning Three-dimensional X-ray ...mentioning

confidence: 99%

<i>In-situ</i> Tensile Tester for Scanning Three-Dimensional X-ray Diffraction Microscopy

et al. 2023

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“…It is much more challenging to do for the deformed microstructure. For recrystallizing grains, such measurements have revealed the surprising result that substantial residual strains can be present [63,64]. When converted to stress, even values near the yield stress are observed at early stages of recrystallization.…”

Section: Residual Stress Effectsmentioning

confidence: 99%

Nucleation of recrystallization

Jensen,

Zhang

2023

J. Phys.: Conf. Ser.

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This paper reviews the mechanisms of nucleation during recrystallization of cold deformed, single phase polycrystalline metals including metals with large particles. The classic nucleation theories and conceptions are shortly summarized, while the main focus is on our results from recent 3D studies of nucleation. The novel results are related to the classic nucleation ideas and agreement/disagreement as well as new suggestions are discussed. More specifically the paper covers recovery leading to intragranular nucleation, bulge nucleation (which is often referred to as strain induced boundary migration), and particle stimulated nucleation. Also, effects of clustered nucleation, crystallographic orientation relationships and residual stress are considered. Finally future studies are suggested, which we consider key to advancing the understanding of nucleation during recrystallization.

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Local residual stresses and microstructure within recrystallizing grains in iron

Cited by 24 publications

References 59 publications

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

<i>In-situ</i> Tensile Tester for Scanning Three-Dimensional X-ray Diffraction Microscopy

Nucleation of recrystallization

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