Acta Metall Sin  2012, Vol. 48 Issue (2): 250-256    DOI: 10.3724/SP.J.1037.2011.00721

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QUASI–SUPERPLASTICITY AND DEFORMATION MECHANISM OF ULTRALIGHT β SOLID SOLUTION Mg–11Li–3Zn ALLOY

CAO Furong 1, DING Hua 1, WANG Zhaodong 2, LI Yinglong 1, GUAN Renguo 1, CUI Jianzhong 3

1. College of Materials and Metallurgy, Northeastern University, Shenyang 110819 2. State Key Lab of Rolling and Tandem Rolling Automation, Northeastern University, Shenyang 110819 3. Key Lab of Materials Electromagnetic Process Research, Ministry of Education, Northeastern University, Shenyang 110819

CAO Furong DING Hua WANG Zhaodong LI Yinglong GUAN Renguo CUI Jianzhong . QUASI–SUPERPLASTICITY AND DEFORMATION MECHANISM OF ULTRALIGHT β SOLID SOLUTION Mg–11Li–3Zn ALLOY. Acta Metall Sin, 2012, 48(2): 250-256.

Abstract References Related Articles Recommended Metrics Download:  PDF(677KB)  Export:  BibTeX | EndNote (RIS)       Abstract  1.2 mm thickness sheets of ultralight Mg–11Li–3Zn alloy with a density of 1.43 g/cm3 was obtained by casting and rolling, the elongation to failure is 200% at 573K with 1.67×10−2 s−1 tensile rate, which indicates high strain rate quasi–superplasticity. Significant dynamic recrystallization and grain refinement occur at 573 K and 1.67×10−2 s−1 under which the grain size turns from initial 27 μm into 9 μm, the stress exponent is 4.4 and the activation energy for flow is 112.6 kJ/mol. It is considered that the deformation mechanism of Mg–11Li–3Zn alloy at 573 K and 1.67×10−2 s−1 is dislocation climb controlled by lattice diffusion. Key words:  Mg–Li–Zn alloy      quasi-superplasticity      mechanical property      microstructure      deformation mechanism      Received:  18 November 2011      ZTFLH:  TG113     TG146.2+2   Fund:  Supported by National Natural Science Foundation of China (Nos.50974038 and 51034002) Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors CAO Fu-Rong DING Hua YU Zhao-Dong LI Yang-Long GUAN Ren-Guo CUI Jian-Zhong URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00721     OR     https://www.ams.org.cn/EN/Y2012/V48/I2/250 [1] Counts W A, Friak M, Raabe D, Neugebauer J. Acta Mater, 2009; 57: 69 [2] Cao F R, Lei F, Cui J Z,Wen J L. Acta Metall Sin, 1999; 35: 770 (曹富荣, 雷方, 崔建忠, 温景林. 金属学报, 1999; 35: 770) [3] Cao F R, Guan R G, Ding H, Li Y L, Zhou G, Cui J Z. Acta Metall Sin, 2010; 46: 715 (曹富荣, 管仁国, 丁 桦, 李英龙, 周舸, 崔建忠. 金属学报, 2010; 46: 715) [4] Nayeb–Hashemi A A, Clark J B, Pelton A D. Bull Alloy Phase Diagram, 1984; 5: 365 [5] Raynor G V. 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