The microstructure, texture, and room temperature mechanical properties of friction stir processed Mg-Y-Nd alloy

Jamili, Amir Mohammad; Zarei-Hanzaki, A.; Abedi, H.R.; Minárik, Peter; Soltani, Reza

doi:10.1016/j.msea.2017.02.096

Cited by 52 publications

(18 citation statements)

References 44 publications

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“…(Figure a,b). It is calculated by averaging the misorientations (angles) between all neighboring pairs of points in the selected grains . The results indicate that the recrystallized grains (blue grains), indicated by black arrows, reveal a lower dislocation density compared with deformed ones.…”

Section: Resultsmentioning

confidence: 99%

Substructure Development and Deformation Twinning Stimulation through Regulating the Processing Path during Multi‐Axial Forging of Twinning Induced Plasticity Steel

et al. 2018

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Multi-axial forging (MAF) at room temperature is employed to investigate the effects of deformation processing path and the amount of imposed strain on the deformation mechanisms of a twinning-induced plasticity (TWIP) steel.The results indicate that the twin frequency is decreased by applying the 2nd compression ( P ɛ ¼ 0.8), however, an unexpected increase is realized at the end of first MAF pass ( P ɛ ¼ 1.2). This is attributed to the change in strain path and orientation dependence of deformation twinning. The latter is phenomenal considering the previous researches reporting the suppression of twinning at the early stage of deformation (ɛ < 0.4). The same sequence is followed during the second pass of MAF process. Interestingly, the progressive and continues substructure development along with dynamic Hall-Petch effect results from deformation twinning leads to an appreciable grain refinement. The latter is accompanied by the sharp drop of hardening rate in corresponding flow curves. The microtexture analysis indicates the strengthened texture of the 1 pass-processed specimens which is weaken at the end of 2 pass due to the recrystallization and increasing the number of texture component. The current work also explores the room temperature mechanical properties of the multi axial forged workpiece through elaborating the miniaturized tensile testing method.

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Section: Resultsmentioning

confidence: 99%

Substructure Development and Deformation Twinning Stimulation through Regulating the Processing Path during Multi‐Axial Forging of Twinning Induced Plasticity Steel

et al. 2018

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“…For multipass FSP of Mg–Al–Zn alloys, the mechanisms of DRX and grain refinement in subsequent passes are similar to the first pass . {10‐12} twinning and bulging of grain boundaries would occur in subsequent passes, which results in further grain refinement in Mg alloys after multipass FSP.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of corrosion resistance of multipass friction stir processed AZ31 magnesium alloy

Liu

Shen

Tang

et al. 2019

Materials & Corrosion

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Multipass friction stir processing (FSP) is an effective method to produce a homogeneous microstructure and enhance the mechanical properties of magnesium (Mg) alloys. However, few studies have concentrated on the variation of corrosion resistance of Mg alloys during multipass FSP. Electrochemical alternating current (AC) impedance, polarization behavior, hydrogen evolution, and corrosion morphology were used to investigate the effects of subsequent passes on the corrosion resistance of FSP AZ31 plates. A quasi‐in‐situ observation of the growth of corrosion products was carried out to further study the corrosion behaviors of FSP AZ31 alloy. It is found that subsequent passes could further reduce the grain size of FSP AZ31 alloy and result in an increase in the hardness compared with the first pass. Moreover, subsequent passes are beneficial to the improvement in the corrosion resistance of AZ31 alloy. Pitting corrosion occurs in FSP AZ31 plates, which has not changed after subsequent passes.

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“…FSP imposes severe shear strain to thin layers of materials, which generally introduces substantial grains' recrystallization. The method is advantageous especially for final processing of demanding materials [31,32]. Besides their versatility, both the RS and FSP methods contribute substantially to structure homogenization, progressive grain refinement, and enhancement of utility and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Texture Evolution in Biocompatible Mg-Y-Re Alloy After Friction Stir Processing

Kunčická

Král

Dvořák

et al. 2019

Metals

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The presented study deals with the investigation of biocompatible WE 43 Mg-based alloy processed via the combination of rotary swaging (RS) and friction stir processing (FSP) at three different rotational speeds of 400 RPM, 800 RPM, and 1200 RPM. The structure observations primarily focused on texture development and characterizations of grain sizes and grain boundaries. The results showed that swaging plus processing at 400 RPM and 1200 RPM lead to substantial recrystallization and grain refinement. The fractions of low angle grain boundaries within the 400 RPM and 1200 RPM samples were approximately 11%, while for the 800 RPM sample exhibiting secondary recrystallization it was about 22%. The grains were also the finest in the 1200 RPM sample (average grain diameter of 1.8 µm). The processed structures exhibited a slight tendency to form the {10-10} <0001> preferential fiber texture (especially the 800 RPM sample). Tensile testing showed the FSP to have positive influence on the ultimate tensile stress, as well as ductility of all the samples; the mechanical properties improved with increasing FSP rate.

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The microstructure, texture, and room temperature mechanical properties of friction stir processed Mg-Y-Nd alloy

Cited by 52 publications

References 44 publications

Substructure Development and Deformation Twinning Stimulation through Regulating the Processing Path during Multi‐Axial Forging of Twinning Induced Plasticity Steel

Substructure Development and Deformation Twinning Stimulation through Regulating the Processing Path during Multi‐Axial Forging of Twinning Induced Plasticity Steel

Evaluation of corrosion resistance of multipass friction stir processed AZ31 magnesium alloy

Texture Evolution in Biocompatible Mg-Y-Re Alloy After Friction Stir Processing

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