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Dynamic Precipitation, Dynamic Recrystallization, and Texture Evolution of Mg–5Zn Alloy Sheets with Trace Ca and Sr Additions

Published online by Cambridge University Press:  12 October 2020

Qin Wu ,
Hongge Yan ,
Jihua Chen ,
Weijun Xia ,
Min Song ,
Bin Su  and
Tian Ding
Qin Wu
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Hongge Yan*
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Jihua Chen
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Weijun Xia
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Min Song
Affiliation:
State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, PR China
Bin Su
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Tian Ding
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
*
*Author for correspondence: Hongge Yan, E-mail: yanhg68@163.com
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Abstract

The effects of trace Ca and Sr addition on dynamic precipitates, dynamic recrystallization (DRX) behavior, and texture evolution of Mg–5Zn alloy sheets fabricated by high strain rate rolling (HSRR) were investigated by electron backscattered diffraction (EBSD), transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and X-ray diffraction (XRD). The Zn-rich precipitates formed with plate shapes, short-rod shapes, and near-spherical shapes, indicating that the most important function of adding Ca and Sr is to promote the precipitation process. The precipitate density increases, but the precipitate size and DRX volume fraction decrease with the addition of the alloying elements. It is concluded that the effects of combined Ca/Sr addition on promoting precipitation and refining precipitate size are more effective than that of single Ca addition, and the reduction in DRX volume fraction can be attributed to the inhibition of fine precipitation on the nucleation and growth of DRX. Moreover, the macro-texture intensity is mainly related to DRX as the DRX grains are much more randomly oriented than deformed grains. In addition, the texture intensity in DRX regions is primarily associated with the precipitates, which can inhibit DRX grain rotation due to their pinning effect on the grain boundaries.

Keywords

Mg-5Zn alloymicroalloyingdynamic precipitatesdynamic recrystallizationtexture
Type
Materials Science Applications
Information
Microscopy and Microanalysis , Volume 26 , Issue 5 , October 2020 , pp. 886 - 894
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Copyright
Copyright © Microscopy Society of America 2020

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References

American Society for Testing and Materials (ASTM) (2015). Standard Test Methods for Determining Average Grain Size Using Semi-Automatic and Automatic Image Analysis. ASTM International, West Conshohocken, PA, E1382-97.Google Scholar
Basu, I & Al-Samman, T (2014). Triggering rare earth texture modification in magnesium alloys by addition of zinc and zirconium. Acta Mater 67, 116–133.CrossRefGoogle Scholar
Bettles, CJ, Gibson, MA & Venkatesan, K (2004). Enhanced age-hardening behaviour in Mg-4wt.% Zn micro-alloyed with Ca. Scr Mater 51(3), 193–197.CrossRefGoogle Scholar
Chen, C, Chen, JH, Yan, HG, Su, B, Song, M & Zhu, SQ (2016). Dynamic precipitation, microstructure and mechanical properties of Mg-5Zn-1Mn alloy sheets prepared by high strain-rate rolling. Mater Des 100, 58–66.CrossRefGoogle Scholar
Cheng, MX, Chen, JH, Yan, HG, Su, B, Yu, ZH, Xia, WJ & Gong, XL (2017). Effects of minor Sr addition on microstructure, mechanical and bio-corrosion properties of the Mg-5Zn based alloy system. J Alloys Compd 691, 95–102.CrossRefGoogle Scholar
Clark, JB (1965). Transmission electron microscopy study of age hardening in a Mg-5wt.% Zn alloy. Acta Mater 13(12), 1281–1289.CrossRefGoogle Scholar
Cui, T, Guan, RG & Qin, HM (2012). The microstructures and mechanical properties of a novel biomaterial Mg-Zn-Sr alloy sheet during aging treatment. Adv Mater Res 562–564, 486–489.CrossRefGoogle Scholar
De Geuser, F & Deschamps, A (2012). Precipitate characterisation in metallic systems by small-angle X-ray or neutron scattering. C R Phys 13, 246–256.CrossRefGoogle Scholar
Ding, T, Yan, HG, Chen, JH, Xia, WJ, Su, B & Yu, ZL (2019). Dynamic recrystallization and mechanical properties of high-strain hot rolled Mg-5%Zn alloys with the addition of Ca and Sr. Trans Nonferrous Met Soc China 29, 1631–1640.CrossRefGoogle Scholar
Du, YZ, Qiao, XG, Zheng, MY, Wang, DB, Wu, K & Golovin, IS (2016 a). Effect of microalloying with Ca on the microstructure and mechanical properties of Mg-6mass%Zn alloys. Mater Des 98, 285–293.CrossRefGoogle Scholar
Du, YZ, Qiao, XG, Zheng, MY, Wu, K & Xu, SW (2015). Development of high-strength, low-cost wrought Mg-2.5mass% Zn alloy through micro-alloying with Ca and La. Mater Des 85, 549–557.CrossRefGoogle Scholar
Du, YZ, Zheng, MY, Qiao, XG, Wang, DB, Peng, WQ, Wu, K & Jiang, BL (2016 b). Improving microstructure and mechanical properties in Mg-6mass% Zn alloys by combined addition of Ca and Ce. Mater Sci Eng A 656, 67–74.CrossRefGoogle Scholar
Goldman, J, Aaronson, HI & Aaron, HB (1970). Growth mechanisms of grain boundary allotriomorphs in Al-4Pct Cu at high homologous temperatures: Interfacial vs direct volume diffusion. Metall Trans 1(7), 1805–1810.CrossRefGoogle Scholar
Guan, SK, Zhu, SJ, Wang, LG, Yang, Q & Cao, WB (2007). Microstructures and mechanical properties of double hot-extruded AZ80+xSr wrought alloys. Trans Nonferrous Met Soc China 17, 1143–1151.CrossRefGoogle Scholar
Guiner, A, Fournet, G & Walker, C (1955). Small Angle Scattering of X-Rays. New York: J. Wiley. Sons, pp. 167–216.Google Scholar
Hantzsche, K, Bohlen, J, Wendt, J, Kainer, KU, Yi, SB & Letzig, D (2010). Effect of rare earth additions on microstructure and texture development of magnesium alloy sheets. Scr Mater 63(7), 725–730.CrossRefGoogle Scholar
Hono, K, Mendis, CL, Sasaki, TT & Oh-ishi, K (2010). Towards the development of heat-treatable high-strength wrought Mg alloys. Scr Mater 63(7), 710–715.CrossRefGoogle Scholar
Hradilová, M, Montheillet, F, Fraczkiewicz, A, Desrayaud, C & Lejček, P (2013 a). Effect of Ca-addition on dynamic recrystallization of Mg-Zn alloy during hot deformation. Mater Sci Eng A 580(10), 217–226.CrossRefGoogle Scholar
Hradilová, M, Vojtěch, D, Kubásek, J, Čapek, J & Vlach, M (2013 b). Structural and mechanical characteristics of Mg-4Zn and Mg-4Zn-0.4Ca alloys after different thermal and mechanical processing routes. Mater Sci Eng A 586, 284–291.CrossRefGoogle Scholar
Jiang, JM, Ni, S, Yan, HG, Wu, Q & Song, M (2018 a). New orientations between β'2 phase and α matrix in a Mg-Zn-Mn alloy processed by high strain rate rolling. J Alloys Compd 750, 465–470.CrossRefGoogle Scholar
Jiang, JM, Wu, J, Ni, S, Yan, HG & Song, M (2018 b). Improving the mechanical properties of a ZM61 magnesium alloy by pre-rolling and high strain rate rolling. Mater Sci Eng A 712, 478–484.CrossRefGoogle Scholar
Lee, YC, Dahle, AK & Stjohn, DH (2000). The role of solute in grain refinement of magnesium. Metall Mater Trans A 31(11), 2895–2906.CrossRefGoogle Scholar
Li, WJ, Deng, KK, Zhang, X, Nie, KB & Xu, FJ (2016). Effect of ultra-slow extrusion speed on the microstructure and mechanical properties of Mg-4Zn-0.5Ca alloy. Mater Sci Eng A 677, 367–375.CrossRefGoogle Scholar
Masoumi, M & Pekguleryuz, M (2011). The influence of Sr on the microstructure and texture evolution of rolled Mg-1%Zn alloy. Mater Sci Eng A 529, 207–214.CrossRefGoogle Scholar
Meng, ZF (1995). Theory and Application of Small Angle X-Ray Scattering. Jilin: Jilin. Sci. Tech. Press, pp. 55–69.Google Scholar
Sitdikov, O, Kaibyshev, R & Sakai, T (2003). Dynamic recrystallization based on twinning in coarse-grained Mg. Mater Sci Forum 419-422, 521–526.CrossRefGoogle Scholar
Somekawa, H, Singh, A & Mukai, T (2009). Microstructure evolution of Mg-Zn binary alloy during a direct extrusion process. Scr Mater 60(6), 411–414.CrossRefGoogle Scholar
Stjohn, DH, Qian, M, Easton, MA, Cao, P & Hildebrand, Z (2005). Grain refinement of magnesium alloys. Mater Sci Eng A 36, 1669–1679.Google Scholar
Wang, SR, Ma, R, Yang, LY, Wang, Y & Wang, YJ (2011). Precipitates effect on microstructure of as-deformed and as-annealed AZ41 magnesium alloys by adding Mn and Ca. J Mater Sci 46(9), 3060–3065.CrossRefGoogle Scholar
Wu, Q, Yan, HG, Chen, JH, Xia, WJ, Song, M & Su, B (2019). Dynamic precipitation behavior before dynamic recrystallization in a Mg-Zn-Mn alloy during hot compression. Mater Charact 153, 14–23.CrossRefGoogle Scholar
Yang, MB, Duan, CY, Wu, DY & Pan, FS (2014). Effects of minor Ca on as-cast microstructures and mechanical properties of Mg-3Ce-1.2Mn-0.9Sc and Mg-4Y-1.2Mn-0.9Sc alloys. Trans Nonferrous Met Soc China 24(6), 1698–1708.CrossRefGoogle Scholar
Yuasa, M, Miyazawa, N, Hayashi, M & Chino, Y (2015). Effects of group II elements on the cold stretch formability of Mg-Zn alloys. Acta Mater 83, 294–303.CrossRefGoogle Scholar
Zhang, BP, Wang, Y, Geng, L & Lu, CX (2012). Effects of calcium on texture and mechanical properties of hot-extruded Mg-Zn-Ca alloys. Mater Sci Eng A 539, 56–60.CrossRefGoogle Scholar
Zhu, SQ, Yan, HG, Chen, JH, Wu, YZ, Liu, JZ & Tian, J (2010). Effect of twinning and dynamic recrystallization on the high strain rate rolling process. Scr Mater 63(10), 985–988.CrossRefGoogle Scholar
Zhu, YP (2008). Small Angle X-Ray Scattering-Theory, Testing, Calculation and Application. Beijing: Chemical Industrial Press, pp. 154–170.Google Scholar
Zou, JK, Yan, HG, Chen, JH, Xia, WJ, Su, B, Lei, Y & Wu, Q (2018). Effects of Sn on microstructure and mechanical properties of as-rolled Mg-5Zn-1Mn alloy. Mater Sci Tech 34, 1468–1479.CrossRefGoogle Scholar