Abnormal texture and sensitivity to strain rate during hot-tension of Mg alloy sheets

Abstract

The deformation behavior of hot-rolled AZ31 magnesium (Mg) alloy sheet was analyzed when subjected to uniaxial tension along its normal direction at temperatures ranging from 100 to 400 °C and strain rates ranging from 0.5 to 100 mm/min. Based on the stress – strain curves and the dynamic material model, the hot processing map was established, which demonstrates that the power dissipation factor (η) is the most sensitive to strain rate at 400 °C via absorption of dislocations. At 400 °C, sample at 0.5 mm/min possesses η of 0.89 because of its lower kernel average misorientation (KAM) value of 0.51, while sample at 100 mm/min possesses η of 0.46 with a higher KAM value of 1.147. In addition, the flow stress presents a slight decrease of 25.94 MPa at 10 mm/min compared to that at 100 mm/min and 100 °C. The reasons are twofold: a special ∼34° texture component during 100 °C-100 mm/min favoring the activation of basal slip, and dynamic recrystallization (DRX) also providing softening effect to some extent by absorbing dislocations. Difference in activation of basal slip among twin laminas during 100 °C-100 mm/min results in deformation inhomogeneity within the grains, which generates stress that helps matrix grains tilt to a direction favorable to basal slip, forming the special ∼34° texture component.

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References

[1] DrozdenkoD, YamasakiM, MáthisK, et al.. Optimization of mechanical properties of dilute Mg-Zn-Y alloys prepared by rapid solidification. Materials & Design, 2019, 181: 107984 J]

[2] TaylorR H, CurtaroloS, HartG L W. Guiding the experimental discovery of magnesium alloys. Physical Review B, 2011, 84(8): 084101 J]

[3] ZhangZ, ZhangJ-h, XieJ-s, et al.. Developing a Mg alloy with ultrahigh room temperature ductility via grain boundary segregation and activation of non-basal slips. International Journal of Plasticity, 2023, 162: 103548 J]

[4] HuZ-q, GuoC-f, LiH-m. Influence of AZ31 sheet treated by cryogenic on punch shearing. Journal of Central South University, 2019, 26(6): 1582-1591 J]

[5] JiY-f, DuanJ-r, YuanH, et al.. Effect of variable thickness cross rolling on edge crack and microstructure gradient of AZ31 magnesium alloy. Journal of Central South University, 2022, 29(4): 1124-1132 J]

[6] KhoubrouI, NamiB, MiresmaeiliS M, et al.. Evolution of microstructure, texture and mechanical properties of ECAP-processed ZK60 magnesium alloy. Metals and Materials International, 2025, 31(1): 227-236 J]

[7] LiuX, HeD-d, ZhuB-w, et al.. The ordered orientation gradient “sandwich” texture induced high strength-ductility in AZ31 magnesium alloy. Scripta Materialia, 2024, 253: 116296 J]

[8] GuanD-k, WynneB, GaoJ-h, et al.. Basal slip mediated tension twin variant selection in magnesium WE43 alloy. Acta Materialia, 2019, 170: 1-14 J]

[9] ZhangH, ChengW-l, FanJ-f, et al.. Improved mechanical properties of AZ31 magnesium alloy sheets by repeated cold rolling and annealing using a small pass reduction. Materials Science and Engineering A, 2015, 637: 243-250 J]

[10] ZhangH, JinW, FanJ-f, et al.. Grain refining and improving mechanical properties of a warm rolled AZ31 alloy plate. Materials Letters, 2014, 135: 31-34 J]

[11] JiangM G, YanH, ChenR S. Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment. Materials & Design, 2015, 87: 891-900 J]

[12] TuJ, ZhouT, LiuL, et al.. Effect of rolling speeds on texture modification and mechanical properties of the AZ31 sheet by a combination of equal channel angular rolling and continuous bending at high temperature. Journal of Alloys and Compounds, 2018, 768: 598-607 J]

[13] HuangX-s, SuzukiK, SaitoN. Microstructure and mechanical properties of AZ80 magnesium alloy sheet processed by differential speed rolling. Materials Science and Engineering A, 2009, 508: 226-233 J]

[14] SongB, XinR-l, ZhengX, et al.. Activation of multiple twins by pre-tension and compression to enhance the strength of Mg-3Al-1Zn alloy plates. Materials Science and Engineering A, 2015, 621: 100-104 J]

[15] LiX-f, LiQ-z. Effect of pre-compression on microstructural evolution, mechanical property and strengthening mechanism of AZ31 alloy. Journal of Materials Science, 2020, 55(25): 11637-11649 J]

[16] StaroselskyA, AnandL. A constitutive model for hcp materials deforming by slip and twinning application to magnesium alloy AZ31B. International Journal of Plasticity, 2003, 19(10): 1843-1864 J]

[17] LeeJ Y, YunY S, SuhB C, et al.. Comparison of static recrystallization behavior in hot rolled Mg-3Al-1Zn and Mg-3Zn-0.5Ca sheets. Journal of Alloys and Compounds, 2014, 589: 240-246 J]

[18] SongB, YangQ-s, ZhouT, et al.. Texture control by {101¯2}\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\{10\overline{1}2\}$$\end{document} twinning to improve the formability of Mg alloys: A review. Journal of Materials Science & Technology, 2019, 35(10): 2269-2282 J]

[19] KoikeJ. Enhanced deformation mechanisms by anisotropic plasticity in polycrystalline Mg alloys at room temperature. Metallurgical and Materials Transactions A, 2005, 36(7): 1689-1696 J]

[20] JiangL, JonasJ J, LuoA A, et al.. Influence of {101¯2}\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\{10\overline{1}2\}$$\end{document} extension twinning on the flow behavior of AZ31 Mg alloy. Materials Science and Engineering A, 2007, 445: 302-309 J]

[21] XuJ, JiangB, SongJ-f, et al.. Unusual texture formation in Mg-3Al-1Zn alloy sheets processed by slope extrusion. Materials Science and Engineering A, 2018, 732: 1-5 J]

[22] WangK, WangJ-f, HuangS, et al.. Formation of an abnormal texture in Mg-Gd-Y-Zn-Mn alloy and its effect on mechanical properties by altering extrusion parameters. Materials Science and Engineering A, 2022, 831: 142270 J]

[23] ShiB Q, ZhangR D, ShangX L, et al.. Reducing mechanical anisotropy by formation of symmetrical ring-like texture via final-pass heavy reduction rolling in Mg alloy. Journal of Materials Research and Technology, 2023, 24: 4315-4328 J]

[24] HanX-z, HuL, JiaD-y, et al.. Role of unusual double-peak texture in significantly enhancing cold rolling formability of AZ31 magnesium alloy sheet. Transactions of Nonferrous Metals Society of China, 2023, 33(8): 2351-2364 J]

[25] HaoJ-q, ZhangJ-s, XuC-x, et al.. Optimum parameters and kinetic analysis for hot working of a solution-treated Mg-Zn-Y-Mn magnesium alloy. Journal of Alloys and Compounds, 2018, 754: 283-296 J]

[26] CaiZ-w, ChenF-x, MaF-j, et al.. Dynamic recrystallization behavior and hot workability of AZ41M magnesium alloy during hot deformation. Journal of Alloys and Compounds, 2016, 670: 55-63 J]

[27] MekonenM N, SteglichD, BohlenJ, et al.. Mechanical characterization and constitutive modeling of Mg alloy sheets. Materials Science and Engineering A, 2012, 540: 174-186 J]

[28] SheikhaniA, RouminaR, MahmudiR. Hot deformation behavior of an extruded AZ31 alloy doped with rare-earth elements. Journal of Alloys and Compounds, 2021, 852: 156961 J]

[29] ShangX, ZhouJ, WangX, et al.. Optimizing and identifying the process parameters of AZ31 magnesium alloy in hot compression on the base of processing maps. Journal of Alloys and Compounds, 2015, 629: 155-161 J]

[30] WangY N, HuangJ C. The role of twinning and untwinning in yielding behavior in hot-extruded Mg-Al-Zn alloy. Acta Materialia, 2007, 55(3): 897-905 J]

[31] UlaciaI, DudamellN V, GálvezF, et al.. Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates. Acta Materialia, 2010, 58(8): 2988-2998 J]

[32] ShamsolhodaeiA, Zarei-HanzakiA, GhambariM, et al.. The high temperature flow behavior modeling of NiTi shape memory alloy employing phenomenological and physical based constitutive models: A comparative study. Intermetallics, 2014, 53: 140-149 J]

[33] MirzadehH, NajafizadehA, MoazenyM. Flow curve analysis of 17-4PH stainless steel under hot compression test. Metallurgical and Materials Transactions A, 2009, 40(12): 2950-2958 J]

[34] MandalS, RakeshV, SivaprasadP V, et al.. Constitutive equations to predict high temperature flow stress in a Ti-modified austenitic stainless steel. Materials Science and Engineering A, 2009, 500(1): 114-121 J]

[35] RajR. Development of a processing map for use in warm-forming and hot-forming processes. Metallurgical Transactions A, 1981, 12(6): 1089-1097 J]

[36] RajagopalacharyT, KutumbaraoV V. Intrinsic hot workability map for a titanium alloy IMI685. Scripta Materialia, 1996, 35(3): 311-316 J]

[37] PrasadY V R K, GegelH L, DoraiveluS M, et al.. Modeling of dynamic material behavior in hot deformation: Forging of Ti-6242. Metallurgical Transactions A, 1984, 15(10): 1883-1892 J]

[38] ZhangQ, ChenZ-y, LiQ-a, et al.. Deformation behavior characterized by reticular shear bands and long chain twins in Mg-Gd-Nd(-Zn)-Zr alloys. Journal of Materials Research and Technology, 2021, 15: 5326-5342 J]

[39] SakaiT, BelyakovA, KaibyshevR, et al.. Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions. Progress in Materials Science, 2014, 60: 130-207 J]

[40] SongB, XinR-l, SunL-y, et al.. Enhancing the strength of rolled ZK60 alloys via the combined use of twinning deformation and aging treatment. Materials Science and Engineering A, 2013, 582: 68-75 J]

[41] WongT W, HadadzadehA, WellsM A. High temperature deformation behavior of extruded AZ31B magnesium alloy. Journal of Materials Processing Technology, 2018, 251: 360-368 J]

[42] KnezevicM, LevinsonA, HarrisR, et al.. Deformation twinning in AZ31: Influence on strain hardening and texture evolution. Acta Materialia, 2010, 58(19): 6230-6242 J]

[43] TianJ, DengJ-f, ShiQ-x, et al.. Effect of temperature field and stress field of different crack behavior on twins and dislocations under Mg alloy rolling. Materials, 2021, 14(19): 5668 J]

[44] WuH Y, WuC-t, YangJ-c, et al.. Hot workability analysis of AZ61 Mg alloys with processing maps. Materials Science and Engineering A, 2014, 607: 261-268 J]

[45] JiangM G, XuC, YanH, et al.. Quasi-in-situ observing the rare earth texture evolution in an extruded Mg-Zn-Gd alloy with bimodal microstructure. Journal of Magnesium and Alloys, 2021, 9(5): 1797-1805 J]

[46] HullD, BaconD J. Observation of dislocations. Introduction to Dislocations, 2011FifthAmsterdam, Elsevier: 21-46 M]

[47] ZhouN-g, WeiX-q, ZhouL. Formation of dislocations in the growth of silicon along different crystallographic directions: A molecular dynamics study. Crystals, 2018, 8(9): 346 J]

[48] WinningM, RollettA D. Transition between low and high angle grain boundaries. Acta Materialia, 2005, 53(10): 2901-2907 J]

[49] HuangK, LogéR E. A review of dynamic recrystallization phenomena in metallic materials. Materials & Design, 2016, 111: 548-574 J]

[50] Jorge-BadiolaD, Iza-MendiaA, GutiérrezI. Evaluation of intragranular misorientation parameters measured by EBSD in a hot worked austenitic stainless steel. Journal of Microscopy, 2007, 228: 373-383 J]

[51] MaQ, LiB, OppedalA L, et al.. Strain rate dependence of twinning at 450 °C and its effect on microstructure of an extruded magnesium alloy. Materials Science and Engineering A, 2013, 559: 314-318 J]

[52] KlimanekP, PötzschA. Microstructure evolution under compressive plastic deformation of magnesium at different temperatures and strain rates. Materials Science and Engineering A, 2002, 324(1): 145-150 J]

[53] YinD L, ZhangK F, WangG F, et al.. Warm deformation behavior of hot-rolled AZ31 Mg alloy. Materials Science and Engineering A, 2005, 392(1): 320-325 J]

[54] ShenJ-y, ZhangL-y, HuL-x, et al.. Effect of subgrain and the associated DRX behaviour on the texture modification of Mg-6.63Zn-0.56Zr alloy during hot tensile deformation. Materials Science and Engineering A, 2021, 823: 141745 J]

[55] HazeliK, AskariH, CuadraJ, et al.. Microstructure-sensitive investigation of magnesium alloy fatigue. International Journal of Plasticity, 2015, 68: 55-76 J]

[56] GaoP, ZhuS Q, AnX H, et al.. Effect of sample orientation and initial microstructures on the dynamic recrystallization of a Magnesium alloy. Materials Science and Engineering A, 2017, 691: 150-154 J]

[57] ZhuS Q, YanH G, LiaoX Z, et al.. Mechanisms for enhanced plasticity in magnesium alloys. Acta Materialia, 2015, 82: 344-355 J]

[58] HongS G, ParkS H, LeeC S. Strain path dependence of {101¯2}\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\{10\overline{1}2\}$$\end{document} twinning activity in a polycrystalline magnesium alloy. Scripta Materialia, 2011, 64(2): 145-148 J]

[59] HongS G, ParkS H, LeeC S. Role of {101¯2}\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\{10\overline{1}2\}$$\end{document} twinning characteristics in the deformation behavior of a polycrystalline magnesium alloy. Acta Materialia, 2010, 58(18): 5873-5885 J]

[60] YuH-h, XinY-c, WangM-y, et al.. Hall-Petch relationship in Mg alloys: A review. Journal of Materials Science & Technology, 2018, 34(2): 248-256 J]

[61] KangY H, HuangZ H, WangS C, et al.. Effect of pre-deformation on microstructure and mechanical properties of WE43 magnesium alloy II: Aging at 250 and 300 °C. Journal of Magnesium and Alloys, 2020, 8(1): 103-110 J]

[62] JiangM G, XuC, YanH, et al.. Unveiling the formation of basal texture variations based on twinning and dynamic recrystallization in AZ31 magnesium alloy during extrusion. Acta Materialia, 2018, 157: 53-71 J]

[63] WangM, XuX Y, WangH Y, et al.. Evolution of dislocation and twin densities in a Mg alloy at quasi-static and high strain rates. Acta Materialia, 2020, 201: 102-113 J]

[64] XiaoH-c, TangB, LiuC-m, et al.. Dynamic precipitation in a Mg-Gd-Y-Zr alloy during hot compression. Materials Science and Engineering A, 2015, 645: 241-247 J]

[65] LuS H, WuD, ChenR S, et al.. Reasonable utilization of {101¯2}\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\{10\overline{1}2\}$$\end{document} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy. Materials & Design, 2020, 191: 108600 J]

[66] McqueenH J, ImbertC A C. Dynamic recrystallization: Plasticity enhancing structural development. Journal of Alloys and Compounds, 2004, 378: 35-43 J]

[67] GuoX Q, ChapuisA, WuP D, et al.. On twinning and anisotropy in rolled Mg alloy AZ31 under uniaxial compression. International Journal of Solids and Structures, 2015, 64: 42-50 J]

[68] KoikeJ, KobayashiT, MukaiT, et al.. The activity of non-basal slip systems and dynamic recovery at room temperature in fine-grained AZ31B magnesium alloys. Acta Materialia, 2003, 51(7): 2055-2065 J]

[69] SongG S, ChenQ Q, ZhangS H, et al.. Deformation micro-mechanism for compression of magnesium alloys at room temperature analyzed by electron backscatter diffraction. Materials & Design (1980–2015), 2015, 65: 534-542 J]

[70] ZhangK, ShaoZ-t, JiangJ. Effects of twin-twin interactions and deformation bands on the nucleation of recrystallization in AZ31 magnesium alloy. Materials & Design, 2020, 194: 108936 J]

[71] BeausirB, SuwasS, TóthL S, et al.. Analysis of texture evolution in magnesium during equal channel angular extrusion. Acta Materialia, 2008, 56(2): 200-214 J]

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