Abstract
An Mg95.50Zn3.71Y0.79 fine-grained solidified alloy with a grain size of 16 μm was prepared by high-pressure solidification. The microstructure characteristics and hot compressive deformation behavior of the alloy solidified under high pressure were compared with the atmospheric-pressure solidified alloy by carrying out the unilateral compression tests under a strain rate in the range of 0.001–1.0 s−1 and at a deformation temperature in the range of 523–573 K. The true stress-true strain curve of the high-pressure solidified alloy shows the typical dynamic recrystallization rheological curve. EBSD results show that when the deformation was carried out at 573 K, nearly 90% dynamic recrystallization occurred in the high-pressure solidified alloy, and the newly formed grains were distortionless and had low dislocation density. The high-pressure solidified alloy showed a double-peak basal texture at a strain rate of 1.0 s−1. The two peak points showed a maximum pole density of 9.88 and 7.91, less than that in atmospheric-pressure alloy. When the deformation was carried out at the following conditions: deformation temperature = 573 K, strain rate = 0.001, and true strain = 0.9, the average Schmid factor (SF) for basal slip of the grains in the high-pressure solidified alloy was 0.419, and SF value for basal slip in 91% grains was greater than 0.3.
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References
Wen K, Liu K, Wang ZW, Li SB, Du WB (2015) Effect of microstructure evolution on mechanical property of extruded Mg–12Gd–2E−1Zn–0.6Zr alloys. J Magnes Alloy 3:23–28
Tahreen N, Zhang DF, Pan FS, Jiang XQ, Li DY, Chen DL (2015) Hot deformation and processing map of an as-extruded Mg–Zn–Mn–Y alloy containing I and W phases. Mater Des 87:245–255
Chang H, Wang XJ, Hu SH, Wang YQ, Nie KB, Wu K (2014) Effects of reinforced particles on dynamic recrystallization of Mg base alloys during hot extrusion. Rare Metal Mater Eng 43:1821–1825
Tong LB, Li X, Zhang DP, Cheng LR, Meng J, Zhang HJ (2014) Dynamic recrystallization and texture evolution of Mg–Y–Zn alloy during hot extrusion process. Mater Charact 92:77–83
Wu WX, Jin L, Dong J, Zhang ZY, Ding WJ (2012) Effect of initial microstructure on the dynamic recrystallization behavior of Mg–Gd–Y–Zr alloy. Mater Sci Eng, A 556:519–525
Koike J, Ohyama R (2005) Geometrical criterion for the activation of prismatic slip in AZ61 Mg alloy sheets deformed at room temperature. Acta Mater 53:1963–1972
Barnett MR, Beer AG, Atwell D, Oudin A (2004) Influence of grain size on hot working stresses and microstructures in Mg–3Al–lZn. Scripta Mater 51:19–24
Li NL, Huang GJ, Zhong XY, Liu Q (2013) Deformation mechanisms and dynamic crystallization of AZ31 Mg alloy with different initial textures during hot tension. Mater Design 50:382–391
Li NL, Huang GJ, Xin RL, Liu Q (2013) Effect of initial texture on dynamic recrystallization and deformation mechanisms in AZ31 Mg alloy extruded at 573 K. Mater Sci Eng, A 569:18–26
Lv BJ, Peng J, Zhu LL, Wang YJ, Tang AT (2014) The effect of 14H LPSO phase on dynamic recrystallization behavior and hot workability of Mg–2.0Zn–0.3Zr–5.8Y alloy. Mater Sci Eng, A 599:150–159
Lin XP, Dong Y, Xu R, Sun GF, Jiao SH (2011) Crystal morphologies and the phases in the Mg–6Zn–3Y alloy solidified under super-high pressure. Acta Metall Sin 47:1550–1554
Lin XP, Dong Y, Xu R, Zheng RG, Jiao SH (2013) Solidification microstructures and crystalline morphologies of Mg–6Zn–Y alloy solidified under GPa level super-high pressure. Rare Metal Mater Eng 42:2309–2314
Lin XP, Dong Y, Xu R, Liu SJ, Tian SS (2014) Solidification process and formation of quasi-crystal phase in Mg–6Zn–1Y alloy under pressure in the order of GPa. Rare Metal Mater Eng 43:1117–1122
Jie JC, Zou CM, Wang HW, Wei ZJ (2010) Microstructure evolution and precipitation of Al–12 Mg alloy solidified under high pressure. J Alloy Compd 506:L12–L15
Zhao SS, Peng QM, Li H (2014) Effects of super-high pressure on microstructures, nano-mechanical behaviors and corrosion properties of Mg–Al alloys. J Alloy Compd 584:56–58
Quey R, Driver JH (2011) Microtexture tracking of sub-boundary evolution during hot deformation of aluminium. Mater Charact 62:1222–1227
Liu MP, Roven HJ, Murashkin M, Valiev RZ (2009) Structural characterization by high-resolution electron microscopy of an Al–Mg alloy processed by high-pressure torsion. Mater Sci Eng, A 503:122–125
Tang LH, Liu CM, Chen ZY, Ji DW, Xiao HC (2013) Microstructures and tensile properties of Mg–Gd–Y–Zr alloy during multidirectional forging at 773 K. Mater Des 50:587–596
Mao PL, Yu JH, Liu Z, Dong Y (2013) Microstructure evolution of extruded Mg–Gd–Y magnesium alloy under dynamic compression. J Magnes Alloy 1:64–75
Wu LY, Yang Z, Xia WJ, Chen ZH, Yang L (2012) The cyclic softening and evolution of microstructures for Mg–10Gd–2.0Y–0.46Zr alloy under low cycle fatigue at 573 K. Mater Des 36:47–53
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The authors would like to thank the National Natural Science Foundation of China (Nos. 51675092, 51775099) for financial support.
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Zhibin, F., Xiaoping, L., Yun, D. et al. Hot compressive deformation behavior and electron backscattering diffraction analysis of Mg95.50Zn3.71Y0.79 fine-grained alloy solidified under high pressure. J Mater Sci 53, 2880–2891 (2018). https://doi.org/10.1007/s10853-017-1698-x
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DOI: https://doi.org/10.1007/s10853-017-1698-x