Texture evolution of AZ31 magnesium alloy sheets during warm rolling

Wang, Jia; Hu, Xiaojun; Zhang, Hong; Ju, Dongying; Chen, D.L.

doi:10.1016/j.jallcom.2015.04.121

Cited by 55 publications

(15 citation statements)

References 37 publications

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“…To improve formability and increase the strength of AZ91 magnesium alloys, many plastic deformation methods have been attempted through grain refinement and precipitated evolution, such as hot extrusion [9,10], twin roll casting [11], hot rolling [12] and severe plastic deformation (SPD), including equal channel angular pressing [13] (ECAP), multidirectional forging [14] (MDF) and differential speed rolling [15] (DSR) and so on. Compared with other plastic deformation methods that could obtain more grain refinement by dynamic recrystallization (DRX) relatively more easily, the rolling process of the AZ series of magnesium alloys is mostly focused on AZ31 and had achieved comparatively matured rolling technology [16], but research on rolling process parameters about AZ91 was rarely reported. The rolling forming of as-cast AZ91 magnesium alloy is still difficult, and its plastic deformation mechanisms are not yet clarified [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of pre-homogenizing treatment on microstructure and mechanical properties of hot-rolled AZ91 magnesium alloys

Zheng

Nie

Liang

et al. 2016

Journal of Magnesium and Alloys

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To improve the homogeneity and rolling formability of as-cast AZ91 magnesium, the effects of pre-homogenizing treatment on microstructure evolution, deformation mechanism, mechanical properties and tensile fracture morphology of hot-rolled AZ91 magnesium alloy were studied. The results showed that the amount of coarse β-Mg17Al12 phase decreases dramatically, being distributed along the grain boundaries as small strips after homogenizing. Twining plays a dominant role in the deformation mechanism of AZ91 alloys in the experimental condition, while dynamic recrystallization (DRX) considerably occurred in homogenized-rolled alloys, contributed to microstructure uniformity and β-Mg17Al12 phase precipitated refinement. The tensile strength of homogenized-rolled AZ91 alloys increases dramatically with elongation declining slightly in contrast to homogenized alloys. The fracture surface of homogenized-rolled specimen exhibits more ductile fracture with the manifestation of a large amount of dimples distributing higher density in matrix, while the micro cracks are prone to initiate around the Mg/Mg17Al12 phase interface and grain boundaries owing to the fragile interface bonding of two phases.

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Section: Introductionmentioning

confidence: 99%

Effect of pre-homogenizing treatment on microstructure and mechanical properties of hot-rolled AZ91 magnesium alloys

Zheng

Nie

Liang

et al. 2016

Journal of Magnesium and Alloys

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“…As a result, a weak DRX texture with multiple components and lower maximum basal pole density of~7.8 was developed in the wall region. Extensive studies have clarified the relationship between DRX and texture evolution of Mg alloys [22][23][24]. Jia et al [24] systematically studied the DRX and texture evolution of AZ31 Mg alloy in warm rolling, and well revealed the texture intensity weakening was inseparable with the improvement of DRX level resulted from rolling reduction.…”

Section: Methodsmentioning

confidence: 99%

“…Extensive studies have clarified the relationship between DRX and texture evolution of Mg alloys [22][23][24]. Jia et al [24] systematically studied the DRX and texture evolution of AZ31 Mg alloy in warm rolling, and well revealed the texture intensity weakening was inseparable with the improvement of DRX level resulted from rolling reduction. Similarly, maximum basal pole intensity decreased from~29.6 to~9.8 with the increment in DRX percentage in this result, which confirms the conclusion.…”

Section: Methodsmentioning

confidence: 99%

Microstructure Evolution and Mechanical Properties of AZ80 Mg Alloy during Annular Channel Angular Extrusion Process and Heat Treatment

Zhao

Yan

et al. 2019

Materials

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Microstructure evolution and mechanical properties of AZ80 Mg alloy during annular channel angular extrusion (350 °C) and heat treatment with varying parameters were investigated, respectively. The results showed that dynamic recrystallization of Mg grains was developed and the dendritic eutectic β-Mg17Al12 phases formed during the solidification were broken into small β-phase particles after hot extrusion. Moreover, a weak texture with two dominant peaks formed owing to the significant grain refinement and the enhanced activation of pyramidal <c + a> slip at relative high temperature. The tension tests showed that both the yield strength and ultimate tensile strength of the extruded alloy were dramatically improved owing to the joint strengthening effect of fine grain and β-phase particles as compared with the homogenized sample. The solution treatment achieved the good plasticity of the alloy resulting from the dissolution of β-phases and the development of more equiaxed grains, while the direct-aging process led to poor alloy elongation as a result of residual eutectic β-phases. After solution and aging treatment, simultaneous bonding strength and plasticity of the alloy were achieved, as a consequence of dissolution of coarse eutectic β-phases and heterogeneous precipitation of a large quantity of newly formed β-phases with both the morphologies of continuous and discontinuous precipitates.

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“…Particular in hexagonal Mg process temperature, [8,9] annealing conditions, [10] and cooling regime are important for the recrystallization behavior. Due to the fact that the crystallographic texture depends on many parameters, it is not easy to compare these textures.…”

Section: Introductionmentioning

confidence: 99%

Hot Rectangular Extrusion Textures of Six Mg‐Alloys Via Neutron Diffraction

Brokmeier

2017

Adv Eng Mater

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Due to the high quality and statistics utilizing neutron diffraction for texture analyses, the crystallographic texture variation of six Mg-alloys is described in detail (AM20-AZ31-AZ61-AZ91-ZC71-WE43). More or less in all cases, the crystallographic texture is composed of some ideal texture components such as {0001} <10-10> and {10-10} <11-20> and fiber components such as <0001> // ND and <10-10> // ED. There is a dependency of the existence and texture sharpness of texture components with alloying elements such as the amount of Al. ZC71 is special with one dominating texture component {10-10} <11-20>. WE43 shows the split of the central pole in the basal pole figure but texture components are identical to other alloys without the tilt.

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Texture evolution of AZ31 magnesium alloy sheets during warm rolling

Cited by 55 publications

References 37 publications

Effect of pre-homogenizing treatment on microstructure and mechanical properties of hot-rolled AZ91 magnesium alloys

Effect of pre-homogenizing treatment on microstructure and mechanical properties of hot-rolled AZ91 magnesium alloys

Microstructure Evolution and Mechanical Properties of AZ80 Mg Alloy during Annular Channel Angular Extrusion Process and Heat Treatment

Hot Rectangular Extrusion Textures of Six Mg‐Alloys Via Neutron Diffraction

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