Texture randomization of AZ31 magnesium alloy sheet for improvement of cold formability by combination of rolling and high temperature annealing

Kohzu, Masahide; Kii, Kenji; Nagata, Yuki; Nishio, Kazunori; Higashi, Kenji; Inoue, Hirofumi

doi:10.2464/jilm.60.237

Cited by 8 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 shows the (0002) pole figure of each sample analyzed by X-ray diffraction. The as-rolled sheet exhibits a texture with the basal plane parallel to the sheet plane, which is a typical texture reported for the rolled magnesium alloys [1,3]. Compared to the as-rolled sheets, FAEed sheets indicate the basal plane inclined by about 15˚ against the ED at all extrusion temperatures.…”

Section: Resultsmentioning

confidence: 55%

“…In general, it is known that a texture in which the basal plane in the hexagonal close packed structure is parallel to the sheet plane develops in magnesium alloy sheets produced by rolling or extrusion [1,2]. However, since the active slip system of magnesium alloy at room temperature is limited to basal slip, the development of such texture deteriorates sheet formability like bulging and deep-drawing [3]. For this reason, many magnesium alloy parts are manufactured by casting methods such as die casting and thixomolding [4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tensile Properties of AZX612 Magnesium Alloy Sheets Processed by Friction-Assisted Extrusion

Kobune

Itoh

2018

DDF

View full text Add to dashboard Cite

Tensile properties at room and elevated temperatures of AZX612 alloy sheets processed by a kind of lateral extrusion method namely Friction-Assisted Extrusion (FAE) were investigated. The FAE was developed to control the texture, and carried out at temperatures ranging from 250 to 350°C with an extrusion ratio of 4 from the as-rolled condition. The results showed that FAE changes the basal texture of the as-rolled sheet into that inclined by about 15˚ against the extrusion direction and raises the intensity of the texture. It was observed that the significant microstructure refinement from as-rolled condition of 10.8μm to 4.7μm after FAE due to dynamic recrystallization at the extrusion temperature of 250°C. The 0.2% proof stress of the FAEed sheets at room temperature became significantly smaller than that of the as-rolled sheet in the extrusion direction but became larger in the transverse direction, resulting in the larger anisotropy. This can be understood by the activity of basal slip. The anisotropy of the tensile properties disappeared at a temperature of 300°C and an initial strain rate of 3.3×10-4s-1. In addition, the elongation was improved from 72% of the as-rolled sheet to 152% at maximum of the FAEed sheets in the extrusion direction. This improvement was attributable to superplastic flow based on grain boundary sliding.

show abstract

Section: Resultsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Tensile Properties of AZX612 Magnesium Alloy Sheets Processed by Friction-Assisted Extrusion

Kobune

Itoh

2018

DDF

View full text Add to dashboard Cite

show abstract

“…Hence, research on texture randomization has also been conducted. 2) Although several studies have been carried out on the formation mechanism of basal texture by hot rolling, the mechanism has not been clarified enough. 3) Two of the authors studied the formation behavior of textures in AZ31 and AZ61 magnesium alloys under high temperature uniaxial compression deformation and found that the degree of texture development and the main component changed during dynamic recrystallization with the deformation conditions.…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior and Texture Formation in AZ80 Magnesium Alloy during Uniaxial Compression Deformation at High Temperatures

2013

View full text Add to dashboard Cite

High temperature uniaxial compression deformation is conducted on AZ80 magnesium alloy at 673 and 723 K by varying the strain rates ranging from 1.0 © 10 ¹4 to 5.0 © 10 ¹2 s ¹1 in order to investigate the behaviors of deformation and texture formation. Particular attention is paid to the development of basal texture. Under the deformation conditions of this study, work softening is observed in all the stressstrain curves without exception. The results of the microstructure observation reveal occurrence of dynamic recrystallization. Formation of fiber texture during the deformation is confirmed. The main component is (0001) when the peak stresses appearing in the stressstrain curves are more than 15 20 MPa, and it develops together with an increase in the peak stress. In contrast, weak fiber textures having a main component at a position 29°a way from the basal plane are formed with deformation conditions giving peak stresses of less than 15 MPa. The stress exponent changes at a peak stress near 20 MPa, suggesting that change in the texture corresponds to the change in the deformation mechanism. It is concluded that the formation of basal texture is due to the continuous dynamic recrystallization resulting from the growth of the subgrains formed by the deformation.

show abstract

Texture formation behaviors of Mg-9Al-1Zn alloy during high-temperature compression deformation

et al. 2016

View full text Add to dashboard Cite

Texture randomization of AZ31 magnesium alloy sheet for improvement of cold formability by combination of rolling and high temperature annealing

Cited by 8 publications

References 15 publications

Tensile Properties of AZX612 Magnesium Alloy Sheets Processed by Friction-Assisted Extrusion

Tensile Properties of AZX612 Magnesium Alloy Sheets Processed by Friction-Assisted Extrusion

Deformation Behavior and Texture Formation in AZ80 Magnesium Alloy during Uniaxial Compression Deformation at High Temperatures

Texture formation behaviors of Mg-9Al-1Zn alloy during high-temperature compression deformation

Contact Info

Product

Resources

About