Journal Article10.1016/J.MSEA.2009.03.045
Orientational analysis of static recrystallization at compression twins in a magnesium alloy AZ31
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TL;DR: In this article, a microtexture analysis performed with the EBSD technique of new grains formed at compression twins in the early stage of static recrystallization of hexagonal magnesium alloy AZ31 was performed.
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Abstract: In contrast to cubic metals, the dominant recrystallization nucleation site of hexagonal magnesium is compression twins or the shear bands evolved from them. In this paper, we determine the macrotextures and microstructures of a magnesium alloy AZ31 during static recrystallization. We interpret these data according to a microtexture analysis performed with the EBSD technique of new grains formed at compression twins in the early stage of static recrystallization. The results show that the orientation characteristics in local regions during nucleation are similar to those of subgrains within compression twins or shear bands. However, the new grains mainly take the orientations of the subgrains, which have been subjected to complicated orientation rotations. This phenomenon is attributed to the large amount of their stored energy. Despite the difference between new grain orientations and those of the deformed matrix, the retained deformation texture after annealing is explained mainly by the incomplete recrystalization of magnesium.
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Citations
Twin recrystallization mechanisms in magnesium-rare earth alloys
Indranil Basu,Talal Al-Samman +1 more
TL;DR: In this article, the deformation in Mg-1Gd under in plane compression (IPC) led to evolution of sharp "prismatic fiber" texture, whereas a weak basal texture was witnessed for Mg 1Ce.
230
Strengthening and toughening of magnesium alloy by {1 0 −1 2} extension twins
TL;DR: In this paper, the mechanisms of strengthening and toughening of hot-rolled AZ31 magnesium alloy by extension twins during strain path changed recompression are studied in the current paper.
225
Explaining texture weakening and improved formability in magnesium rare earth alloys
TL;DR: In this article, rare earth (RE) elements including Y, Ce, La, Gd and Nd are used to weaken these strong basal textures and significantly improve formability of magnesium alloys.
216
Softening and dynamic recrystallization in magnesium single crystals during c-axis compression
TL;DR: In this article, a commercial purity (99.8%) magnesium single crystals were subjected to plane strain compression (PSC) along the c-axis at 200 and 370 degrees C and a constant strain rate of 10(-3) s(-1).
212
Individual effect of recrystallisation nucleation sites on texture weakening in a magnesium alloy: Part 1- double twins
TL;DR: In this paper, a quasi-in-situ electron backscatter diffraction method was used to track the evolution of the rare earth texture during annealing at 490°C.
188
References
Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B
Sean R. Agnew,Ozgur Duygulu +1 more
TL;DR: In this paper, a combination of experimental and simulation techniques were used to investigate the plastic behavior of wrought magnesium alloy and found that an increased activity of non-basal dislocations provides a self-consistent explanation for the observed changes in the anisotropy with increasing temperature.
1.5K
Twinning and the ductility of magnesium alloys Part I: “Tension” twins
TL;DR: In this article, a series of tensile test results are reported for the common wrought alloy AZ31 and a simple constitutive model is employed to argue that View the MathML source twinning (which gives extension along the c-axis) can increase the uniform elongation in tensile tests.
1.2K
Twinning and the ductility of magnesium alloys: Part II. “Contraction” twins
TL;DR: In this paper, a series of tensile and compression tests results are reported for common wrought alloys: AZ31, ZK60 and ZM20, and these data are combined with EBSD analysis and simple flow stress models to argue the following: (i) contraction double twinning (which enables contraction along the c axis) can decrease the uniform elongation, and (ii) compression double twinening can also account for shear failure at low strains.
1K
Hardening evolution of AZ31B Mg sheet
TL;DR: In this article, the monotonic and cyclic mechanical behavior of O-temper AZ31B Mg sheet was measured in large-strain tension/compression and simple shear.
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Dynamic recrystallisation and the development of microstructure during the high temperature deformation of magnesium
TL;DR: The mechanism of dynamic recrystallisation at temperatures between 425 and 600 K is reported to not involve significant high angle boundary migration, but to be similar to a mechanism reported for several minerals.
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