Effect of rare earth additions on the critical resolved shear stresses of magnesium alloys

Herrera-Solaz, V.; Hidalgo-Manrique, P.; Pérez‐Prado, M.T.; Letzig, Dietmar; LLorca, J.; Segurado, J.

doi:10.1016/j.matlet.2014.04.144

Cited by 91 publications

(22 citation statements)

References 24 publications

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“…The texture evolution was calculated in 15 steps with a 0.005 effective strain step, giving a total of a 0.04 deformation. In the present study, strain rate tensor L and and relaxed constraints tensors K 1 and K 2 were as follows (see [17]): In Table 1, the CRSS for the slip systems taken to the simulations are presented [20][21][22][23]. From the simulations, the Taylor factor (TF) and slip system activity were obtained.…”

Section: Methodsmentioning

confidence: 99%

“…It can be seen that the initial texture for AZ61 has rather no effect on the main deformation mode. The basal slip system is not active in the case of Samples A AZ61 , but the deformation in the non-basal slip systems (which have a very high values of CRSS [20][21][22][23]) results in TF values comparable to Sample A Mg , where twinning was taken into account during the simulations (Fig. 3f).…”

Section: Fig 3 Slip System Activity Obtained From Simulations For Smentioning

confidence: 99%

“…Thus, the twinning does not need to be activated during the deformation of the Type A and B AZ61 samples. The alloying elements reduce the CRSS for non-basal slip systems, making them easier to activate [20][21][22][23]; on the other hand, it increases the CRSS for basal slip systems, making it harder to activate. This explains why deformation by slip is the main deformation mode in both the A AZ61 and B AZ61 samples.…”

Section: Fig 3 Slip System Activity Obtained From Simulations For Smentioning

confidence: 99%

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Effect of Texture on Deformation Mode in Magnesium and Az61 Alloy

Sułkowski

2018

mafe

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The effect of the initial texture on the deformation mode and mechanical properties was studied in magnesium and its AZ61 alloy. Both materials had a very similar initial texture. Two cases were investigated: samples with a texture where the basal slip system was blocked, and samples having a texture where the basal slip system was allowed to activate. The samples were deformed by compression at room temperature at a strain rate of 10 −3 s −1 . It was found that the initial texture had a very strong impact on the deformation mode in magnesium; however, there was no effect of the initial texture on the deformation mode in the case of AZ61. The investigations were compared to simulations of texture evolution using the Taylor model. From the simulations, the Taylor factor and slip system activity were obtained. It was found that, in the case of magnesium, twinning or slip (both basal and non-basal) are the two main deformation modes, while in the case of AZ61, slip is the only main deformation mechanism despite the initial texture. The impact of the initial texture is discussed in more detail in the present study. StreszczenieW pracy badano wpływ początkowej tekstury na mechanizmy deformacji i właściwości mechaniczne magnezu i stopu magnezu AZ61. Zbadano dwa przypadki: próbki, w których bazalny system poślizgu został zablokowany, oraz próbki, w których bazalny system poślizgu mógł być aktywowany. Próbki odkształcano przez ściskanie w temperaturze pokojowej z prędkością odkształcania 10 -3 s -1 . Stwierdzono, że początkowa tekstura miała bardzo silny wpływ na sposób deformacji magnezu; jednak w przypadku AZ61 nie zauważono podobnego efektu wpływu początkowej tekstury na właściwości mechaniczne. Badania porównano z symulacjami ewolucji tekstury za pomocą modelu Taylora. Z symulacji uzyskano współczynnik Taylora i aktywności systemów poślizgu. Stwierdzono, że w przypadku magnezu, w zależności od początkowej tekstury, poślizg (zarówno w bazalnym systemie, jak i niebazalnych systemach poślizgu) oraz bliźniakowanie są dwoma głównymi mechanizmami deformacji, natomiast w przypadku AZ61 głównym mechanizmem deformacji, pomimo początkowej tekstury, jest tylko poślizg.

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Section: Methodsmentioning

confidence: 99%

Section: Fig 3 Slip System Activity Obtained From Simulations For Smentioning

confidence: 99%

Section: Fig 3 Slip System Activity Obtained From Simulations For Smentioning

confidence: 99%

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Effect of Texture on Deformation Mode in Magnesium and Az61 Alloy

Sułkowski

2018

mafe

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“…Compared to Y, fewer studies have been performed on the influence of neodymium (Nd) on deformation. Herrera-Solaz et al [22] reported the effect of Nd on the isotropic mechanical behavior of Mg-Mn alloys. On one hand, they found the higher CRSS ratio of basal slip modes and twinning (CRSS basal /CRSS twinning ) for Mg-Mn alloy than for pure Mg and on the other hand the lower CRSS non-basal /CRSS twinning ratio for Mg-Mn alloy than for pure Mg. Zhang et al [23] investigated the extended and stabilized dislocation configuration and the improved ductility due to the decrease stacking fault energy with the addition of REs (in [23] REs = Pr, Nd, Gd, Tb, Dy) using density functional theory.…”

Section: Introductionmentioning

confidence: 99%

Texture and Lattice Strain Evolution during Tensile Loading of Mg–Zn Alloys Measured by Synchrotron Diffraction

Zhou

et al. 2020

Metals

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To explore the effect of neodymium (Nd) on the deformation mechanisms of Mg–Zn alloys, texture and lattice strain developments of hot-rolled Mg–Zn (Z1) and Mg–Zn–Nd (ZN10) alloys were investigated using in situ synchrotron diffraction and compared with elasto-viscoplastic self-consistent simulation under tensile loading. The Nd-containing ZN10 alloys show much weaker texture after hot rolling than the Nd-free Z1 alloy. To investigate the influence of the initial texture on the texture and lattice strain evolution, the tensile tests were carried out in the rolling and transverse direction. During tension, the {002}<100> texture components develop fast in Z1, which was not seen for ZN10. On the other hand, <100> fiber // loading direction (LD) developed in both alloys, although it was faster in ZN10 than in Z1. Lattice strain investigation showed that <101> // LD-oriented grains experienced plastic deformation first during tension, which can be related to basal slip activity. This was more apparent for ZN10 than for Z1. The simulation results show that the prismatic slip plays a vital role in the plastic deformation of Z1 directly from the beginning. In contrast, ZN10 plastic deformation starts with dominant basal slip but during deformation prismatic slip becomes increasingly important.

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“…Herrera-Solaz et al [39] investigated the effect of Nd addition on Mg-Mn alloys using crystal plasticity finite element simulations. While their modeling results predict increasing CRSSs of all slip modes compared to pure Mg, they particularly noted a strong increase of the CRSS of <a> basal slip.…”

Section: Introductionmentioning

confidence: 99%