Micro and macro texture evolution during multiaxial forging of a WE43 magnesium alloy

Salandari-Rabori, A.; Zarei-Hanzaki, A.; Abedi, H.R.; Lecomte, Jean-Sébastien; Khatami-Hamedani, H.

doi:10.1016/j.jallcom.2017.12.181

Cited by 51 publications

(16 citation statements)

References 38 publications

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“…This procedure has been widely used, for example, to improve the properties of aluminum [18,19] and titanium [20] alloys. In addition, the effectiveness of using this processing method for grain refinement in magnesium alloys down to the UFG state was demonstrated in [12,21,22,23,24,25,26,27,28,29,30]. Thus, Li et al [26] showed that the application of MAD to alloy Mg-2%Zn-2%Gd allows attaining a very fine microstructure with the average grain size of ~500 nm.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties, Biodegradation, and Biocompatibility of Ultrafine Grained Magnesium Alloy WE43

et al. 2019

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In this work, the effect of an ultrafine-grained (UFG) structure obtained by multiaxial deformation (MAD) on the mechanical properties, fatigue strength, biodegradation, and biocompatibility in vivo of the magnesium alloy WE43 was studied. The grain refinement down to 0.93 ± 0.29 µm and the formation of Mg41Nd5 phase particles with an average size of 0.34 ± 0.21 µm were shown to raise the ultimate tensile strength to 300 MPa. Besides, MAD improved the ductility of the alloy, boosting the total elongation from 9% to 17.2%. An additional positive effect of MAD was an increase in the fatigue strength of the alloy from 90 to 165 MPa. The formation of the UFG structure also reduced the biodegradation rate of the alloy under both in vitro and in vivo conditions. The relative mass loss after six weeks of experiment was 83% and 19% in vitro and 46% and 7% in vivo for the initial and the deformed alloy, respectively. Accumulation of hydrogen and the formation of necrotic masses were observed after implantation of alloy specimens in both conditions. Despite these detrimental phenomena, the desired replacement of the implant and the surrounding cavity with new connective tissue was observed in the areas of implantation.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties, Biodegradation, and Biocompatibility of Ultrafine Grained Magnesium Alloy WE43

et al. 2019

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“…As shown in Figure 4 c and Figure 6 a,b at the equivalent strain of 0.88, the previous twins were replaced by full recrystallized structures rapidly. Secondly, with further deformation, the grain size of the alloys which are forged at low strain rate undergo a slight change due to the completion of DRX [ 20 , 21 , 22 , 23 ], while the grains grew obviously with the deformation pass after a full recrystallized structure was obtained in the present research. The temperature increment caused by the adiabatic heating in high strain rate deformation may aid the grain growth.…”

Section: Resultsmentioning

confidence: 61%

“…As mentioned above, the microstructure evolution of the AZ31 alloy during HSRBF can lead to the refinement and growth of the grain, which was different from alloys forged at low strain rates as reported in references [ 20 , 21 , 22 , 23 ]. Firstly, much higher critical strains that control the degree of homogeneous DRX structure are found in references [ 20 , 21 , 22 , 23 ].…”

Section: Resultsmentioning

confidence: 80%

“…Firstly, much higher critical strains that control the degree of homogeneous DRX structure are found in references [ 20 , 21 , 22 , 23 ]. It is found that the critical equivalent strains to achieve a full recrystallized structure are 4.5, 2.4 and 3.4 for WE43 [ 20 , 21 ], AZ80 [ 22 ] and AZ61 [ 23 ] alloys, respectively; however, in the present study the equivalent strain is only 0.88. The same finding was reported by Li et al [ 11 ] in the rapid forging process of AZ31 magnesium alloy.…”

Section: Resultsmentioning

confidence: 99%

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Microstructure, Texture and Mechanical Properties of AZ31 Magnesium Alloy Fabricated by High Strain Rate Biaxial Forging

Ji-zhao

Deng

et al. 2020

Materials

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High strain rate biaxial forging (HSRBF) was performed on AZ31 magnesium alloy to an accumulated strain of ΣΔε = 1.32, the related microstructure, texture and mechanical properties were investigated. It was found that the microstructure evolution can be divided into two steps during HSRBF. In the early forging processes, the refinement of the grain is obvious, the size of ~10 μm can be achieved; this can be attributed to the unique mechanisms including the formation of high density twins ({101(-)2} extension twin and {101(-)1}-{101(-)2} secondary twin) and subsequently twining induced DRX (dynamic recrystallization). The thermal activated temperature increases with the increase of accumulated strain and results in the grain growth. Rolling texture is the main texture in the high strain rate biaxial forged (HSRBFed) alloys, the intensity of which decreases with the accumulated strain. Moreover, the basal pole rotates towards the direction of forging direction (FD) after each forging pass, and a basal texture with basal pole inclining at 15–20° from the rolling direction (RD) is formed in the full recrystallized HSRBFed alloys. The grain refinement and tiled texture are attributed to the excellent strength and ductility of HSRMBFed alloys with full recrystallized structure. As the accumulated strain is ΣΔε = 0.88, the HSRMBFed alloy displays an outstanding combination of mechanical properties, the ultimate tensile strength (UTS) is 331.2 MPa and the elongation is 25.1%.

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“…The coexistence of low and high angle grain boundaries indicates that the subgrains tend to rotate and form grain boundaries with high misorientation angle during straining. It is clear that the fine equiaxed ferrite grains, with the average grain size of about 5 µm, could be formed by a CDRX mechanism …”

Section: Resultsmentioning

confidence: 99%

Toward Unraveling the High Temperature Microstructure Processing Properties Relationship in a Ni‐Free High Nitrogen Bearing Duplex Stainless Steel

Khatami-Hamedani

Zarei-Hanzaki

Ghambari

et al. 2018

steel research int.

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The present study deals with thermomechanical processing behavior of a Nifree high nitrogen bearing duplex stainless steel. This is performed through compressing the material over a wide range of temperature (700-1000 C) under the strain rates of 0.001-0.1 s À1 . The microstructural observations show that continuous and discontinuous dynamic recrystallization are taken place simultaneously in austenite at 900 and 1000 C by generating subgrains and bulging along the prior austenite grain boundaries, respectively. Electron backscattered diffraction analysis also reveals that the occurrence of continuous dynamic recrystallization is the governing restoration phenomenon in ferrite over the studied conditions. At last, to consolidate the experimental results, a strain-compensated constitutive model is developed to predict the flow behavior of N-bearing duplex steel.

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Micro and macro texture evolution during multiaxial forging of a WE43 magnesium alloy

Cited by 51 publications

References 38 publications

Mechanical Properties, Biodegradation, and Biocompatibility of Ultrafine Grained Magnesium Alloy WE43

Mechanical Properties, Biodegradation, and Biocompatibility of Ultrafine Grained Magnesium Alloy WE43

Microstructure, Texture and Mechanical Properties of AZ31 Magnesium Alloy Fabricated by High Strain Rate Biaxial Forging

Toward Unraveling the High Temperature Microstructure Processing Properties Relationship in a Ni‐Free High Nitrogen Bearing Duplex Stainless Steel

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