Texture evolution in single crystal iron static recrystallization through in-situ EBSD observation

Luo, Zichao; Yoshino, Masahiko; Terano, Minoru; Yamanaka, Akinori

doi:10.1016/j.promfg.2018.07.316

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…The three-stage hardening is a kinematic consequence of the co-axiality constraint that is imposed on specimens during standard uniaxial tests [22]. The use of simple shear avoids the specimen suffering from uniaxial deformation, which is only induced by plane constraints in the shear zones.…”

Section: Different Methods For Shearmentioning

confidence: 99%

“…The initial crystal orientation has a significant effect on the initial slip activation, crystal rotation and dislocation evolution during plastic deformation [38][39][40][41][42][43]. Recently, Luis et al [22] reported that the notorious staged hardening of metals as an inflected phenomenon is directly caused by crystal rotation under uniaxial strain and that the mechanisms of dislocation behavior are the same across all stages of metal hardening. This conclusion was based on the atomistic simulations of single crystal aluminum with [001],…”

Section: The Effects Of the Crystal Rotation Of Metallic Single Cryst...mentioning

confidence: 99%

“…Table 1. The qualitative characteristics of strain hardening that were observed in the MD simulations [22]. Saai et al [43] performed tensile experiments using single crystal aluminum with a special initial orientation of [125] to investigate crystal rotation during uniaxial tensile deformation.…”

Section: The Effects Of the Crystal Rotation Of Metallic Single Cryst...mentioning

confidence: 99%

“…On either side of the deformation zone, the crystals cannot glide freely without constraint, so the crystals rotate, thereby forcing the slip direction to rotate toward the direction of the tensile axis. The crystal rotation of single crystals under tension, compression or shear can be observed from the pole figures in the EBSD by comparing the as-deformed orientations to the known orientations in the undeformed state, while the actual orientations of single crystals under specific strain can be illustrated using stereographic projection [19][20][21][22]. The crystal rotation of metallic single crystals during plastic deformation is a repeated iteration process, which is caused by the repetitively change in orientation factor and further results in geometric hardening or softening [23].…”

Section: Introductionmentioning

confidence: 99%

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Path Dependency of Plastic Deformation in Crystals: Work Hardening, Crystallographic Rotation and Dislocation Structure Evolution

Zhang

Liu

et al. 2022

Crystals

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This paper reviewed the research progress of studies on the crystal rotation of single crystals that were deformed by tension and shear and the influences of crystal rotation and dislocation evolution on strain hardening behavior in crystals that were deformed with different initial orientations. The crystal rotation is entirely different depending on whether the single crystal was deformed by tension or shear. A three-stage work hardening behavior, which is not one of the intrinsic properties of materials, is generated when FCC metallic single crystals are deformed by tension along unstable oriFigurFigurentations, but single crystals do not exhibit this three-stage hardening behavior when they are deformed by simple shear at room temperature. Under tension, crystal rotation causes the transition from work hardening stage I to stage II, while the transition from work hardening stage II to III is caused by dislocation evolution. The evolution of the dislocation structure is related to deformation loading and can be classified into three types when a crystal is deformed by tension. Different from tension, shear stress can directly act on one of the 12 slip systems when a crystal is deformed by simple shear. When FCC single crystals are deformed by shear along the (11¯1)[110], (111)[112¯] and (001)[110] orientations, the single slip system, co-planar slip systems and co-directional slip systems are activated, respectively, and the crystals hardly rotate under the shear conditions. The slip direction of [110] forces the crystal to rotate toward the shear direction under simple shear. The dislocation tangles tend to form the dislocation cells and wall structures when multiple slip systems are activated under simple shear.

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Section: Different Methods For Shearmentioning

confidence: 99%