Effect of initial orientation on the microstructure and mechanical properties of textured AZ31 Mg alloy during torsion and annealing

Wang, Jun; Zhang, Duxiu; Li, Yang; Xiao, Zhenyu; Fouse, Jiaping; Yang, Xuyue

doi:10.1016/j.matdes.2015.07.113

Cited by 21 publications

(11 citation statements)

References 42 publications

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“…Nevertheless, for 2P and 4P, (0002) fiber texture was considerably weakened. Weakening of fiber texture leads to a higher Schmid factor value and this result in easier slip and a lower stress is required for yielding [26,27]. Lastly, the features and size of grains after ECAP may contribute to the grain-boundary sliding (GBS).…”

Section: Effect Of Ecap Process On Mechanical Properties At Lower Temmentioning

confidence: 99%

Effects of texture and grain size on mechanical properties of AZ80 magnesium alloys at lower temperatures

et al. 2016

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Section: Effect Of Ecap Process On Mechanical Properties At Lower Temmentioning

confidence: 99%

Effects of texture and grain size on mechanical properties of AZ80 magnesium alloys at lower temperatures

et al. 2016

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“…Recently, it has been found that torsion deformation is somewhat superior for improving the mechanical properties of rod-shaped materials [22,23,24,25,26,27,28]. Specifically, torsion deformation can introduce a gradient distribution of deformed microstructure compared with other deformation types.…”

Section: Introductionmentioning

confidence: 99%

Improving Tensile and Compressive Properties of an Extruded AZ91 Rod by the Combined Use of Torsion Deformation and Aging Treatment

et al. 2017

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In this study, AZ91 magnesium alloy rods were used to investigate the effects of torsion deformation on microstructure and subsequent aging behavior. Extruded AZ91 rod has a uniform microstructure and typical fiber texture. Torsion deformation can generate a gradient microstructure on the cross-section of the rod. After torsion, from the center to the edge in the cross-section of the rod, both stored dislocations and area fraction of {10-12} twins gradually increase, and the basal pole of the texture tends to rotate in the ED direction. Direct aging usually generates coarse discontinuous precipitates and fine continuous precipitates simultaneously. Both twin structures and dislocations via torsion deformation can be effective microstructures for the nucleation of continuous precipitates during subsequent aging. Thus, aging after torsion can promote continuous precipitation and generate gradient precipitation characteristics. Both aging treatment and torsion deformation can reduce yield asymmetry, and torsion deformation enhances the aging hardening effect by promoting continuous precipitation. Therefore, combined use of torsion deformation and aging treatment can effectively enhance the yield strength and almost eliminate the yield asymmetry of the present extruded AZ91 rod. Finally, the relevant mechanisms are discussed.

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“…Recently, some researchers also developed some methods (e.g., incremental HPT and HPT extrusion) to fabricate the HPT sample with extraordinarily high aspect‐ratio of thickness to diameter and continuous production . In the latest work, end‐free torsion deformation has also been used to enhance the strength of steel, copper, and Mg alloys . Moreover, for extruded AZ31 rod, torsion deformation can also improve the yield asymmetry .…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies, the torsion deformation was usually carried out at the unidirectional torsion. However, a large number of studies have proved that both microstructure and texture of wrought Mg alloys are very sensitive to strain path . In this study, two torsion routes, unidirectional torsion and reciprocating torsion, were carried out to process the Mg alloy rods.…”

Section: Introductionmentioning

confidence: 99%

Influence of Torsion Route on the Microstructure and Mechanical Properties of Extruded AZ31 Rods

et al. 2017

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Torsion deformation is an effective and simple technique to tailor the mechanical properties of Mg alloys. In this study, the influences of torsion route on microstructure and mechanical properties of AZ31 rods are investigated. The maximum torsion angle is set as 180 and the two-pass torsion at different torsion routes, twice-successive unidirectional torsion (T A ) and reciprocating torsion (T B ), is used to process the Mg alloy rods. It is found that the mechanical properties and yield asymmetry are very sensitive to the torsion route. Route T A is more effective for the enhancement of compressive yield strength and the improvement of yield asymmetry, while route T B is more effective for the enhancement of tensile yield strength. It is mainly attributed to the different textural evolutions between the two torsion routes. The relevant mechanisms are addressed and discussed. Experimental SectionExtruded AZ31 magnesium alloy rods with a diameter of 16 mm were subjected to free-end torsion deformation. Dog-bone-shaped specimens with a gauge length as Ф 6 Â 28 mm

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Effect of initial orientation on the microstructure and mechanical properties of textured AZ31 Mg alloy during torsion and annealing

Cited by 21 publications

References 42 publications

Effects of texture and grain size on mechanical properties of AZ80 magnesium alloys at lower temperatures

Effects of texture and grain size on mechanical properties of AZ80 magnesium alloys at lower temperatures

Improving Tensile and Compressive Properties of an Extruded AZ91 Rod by the Combined Use of Torsion Deformation and Aging Treatment

Influence of Torsion Route on the Microstructure and Mechanical Properties of Extruded AZ31 Rods

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