Grain refinement in AZ91 magnesium alloy during thermomechanical processing

Kumar, Navneet; Blandin, Jean‐Jacques; Desrayaud, Christophe; Montheillet, F.; Suéry, M.

doi:10.1016/s0921-5093(03)00334-4

Cited by 160 publications

(61 citation statements)

References 13 publications

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“…However, there are only two independent modes for basal slip, insufficient to satisfy the von Mises criterion. Because the critical resolved shear stress for the non-basal (prismatic and pyramidal) slip system decreases rapidly with the increase of temperature, the non-basal slip systems are expected to be active at high temperature [4,14,15], contributing to the ductility of Mg alloy. Consequently, the thermomechanical processing is frequently performed at high temperature.…”

Section: Discussionmentioning

confidence: 99%

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Study of the microstructure, texture and tensile properties of as-extruded AZ91 magnesium alloy

Ding

Liu

Kamado

et al. 2008

Journal of Alloys and Compounds

126

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Section: Discussionmentioning

confidence: 99%

“…Tel. : +86 forming characteristics of this alloy [2][3][4][5][6][7][8]. The plastically processed AZ91 alloy have been proved to have good superplasticity at low temperature, especially when it has very small grain size (<10 m) [9,10].…”

Section: Introductionmentioning

confidence: 97%

Study of the microstructure, texture and tensile properties of as-extruded AZ91 magnesium alloy

Ding

Liu

Kamado

et al. 2008

Journal of Alloys and Compounds

126

View full text Add to dashboard Cite

“…Weight reduction for automobile fuel economy has spurred an increase in magnesium consumption over the past decade at an annual rate of 15 pct. [1] At present, magnesium components for automotive applications are mainly produced by the die-casting process, because die-cast components can be produced with high productivity and minimal or no machining process. [2] Wrought magnesium alloys can be produced with better mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of strontium on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy

Zeng

Wang

Ding

et al. 2006

Metall Mater Trans A

116

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The effect of strontium (Sr) on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy and its sensitivity to cooling rate are investigated. Three phases-blocky-shaped Mg 17 Al 12 , acicular Mg 20 Al 20 Mn 5 Sr, and insular Mg 16 (Al,Zn) 2 Sr-are identified in the Sr-containing AZ31 alloys. With increasing cooling rate, the blocky-shaped Mg 17 Al 12 phase increases, the acicular Mg 20 Al 20 Mn 5 Sr phase diminishes, and the insular Mg 16 (Al,Zn) 2 Sr phase is refined and granulated. The study suggests that the grain size decreases with increasing cooling rate for a given composition. However, the grain size decreases first, then increases, and finally decreases again with increasing Sr for a given cooling rate. The yield strength ( y ) of AZ31 magnesium alloy can be improved by grain refinement and expressed as y ϭ 35.88 ϩ 279.13d Ϫ1/2 according to the Hall-Petch relationship. The elongation increases when Sr is added up to 0.01 pct and then decreases with increasing Sr addition. Grain refinement changes the fracture behavior from quasicleavage failure for the original AZ31 alloy to mixed features of quasicleavage and microvoid coalescence fracture.

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“…Lastly, Chen et al [26] found that the morphology of the eutectic phase in the Pb-Sn alloy transformed from a developed dendrite to a refined equiaxed grain under AMF. Furthermore, the application of AMF during the solidification process can also purify the melt and reduce macro-segregation and casting defects in the material [27][28][29][30][31].…”

Section: Methodsmentioning

confidence: 99%

Influences of Alternating Magnetic Fieldson the Growth Behavior and Distribution of the Primary Fe Phasein Cu-14Fe Alloys during the Solidification Process

Zeng

Liu

et al. 2018

Metals

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An alternating magnetic field (AMF) was applied during the solidification process of the Cu-14Fe alloy and the effect of the electromagnetic parameter, which impact the model and solidification technique of the solidification structure that were analyzed. Results show that an AMF applied during the solidification process significantly reduced macro-segregation and gas hole defects. During the growth process of the primary Fe phase, the AMF impacted the nucleation of detached grains and fusing dendrites. Specifically, the developed Fe dendrites were transformed to rosettes or spherical grains in the presence of an applied AMF while the grain distribution was more disperse and uniform. It was found that the growth behavior of Fe grains under AMF depended upon the combined effects of the electromagnetic force and electromagnetic heat.

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Grain refinement in AZ91 magnesium alloy during thermomechanical processing

Cited by 160 publications

References 13 publications

Study of the microstructure, texture and tensile properties of as-extruded AZ91 magnesium alloy

Study of the microstructure, texture and tensile properties of as-extruded AZ91 magnesium alloy

Effect of strontium on the microstructure, mechanical properties, and fracture behavior of AZ31 magnesium alloy

Influences of Alternating Magnetic Fieldson the Growth Behavior and Distribution of the Primary Fe Phasein Cu-14Fe Alloys during the Solidification Process

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