Transactions of Materials and Heat Treatment

Title：Influence of rolling temperature on microstructure and properties of AZ31 magnesium alloy sheet

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ClassificationCode：TG146. 2

year,vol(issue):pagenumber：2023,48(1):158-165

Abstract：

The sheet blank of AZ31 magnesium alloy after multi-directional forging was rolled at high strain rate, and the influences of rolling temperature on microstructure and mechanical properties of sheet metal were studied. The results show that in the early stage ofhigh strain rate rolling, the twinning effect is enhanced to form a large number of stretch twinning ({101-2} ) and secondary twinning ({101-1}-{101-2}). In the later stage of deformation, the grain structure of alloy is obviously refined due to the dynamic recrystallization induced by twinning. Under the high strain rate rolling with the reduction of 80% and the rolling temperature of 250-400 ℃, the microstructure of rolled sheet is completely recrystallized, and the average grain size increases from 6. 97 μm to 8. 13 μm with the increasing of rolling temperature. But due to the small initial grain size of rolled sheet, the grain size changes little with the increasing of rolling temperature,and the tensile strength and elongation of rolled sheet are higher than 315 MPa and 25%, indicating that the high strain rate rolling process can produce the magnesium alloy sheet with stable mechanical properties in a wide temperature range.

Funds：

国家自然科学基金资助项目(52171115); 湖南省科技创新计划资助(2021RC1008); 大学生创新创业训练计划项目(202211528005, S202211528050)

作者简介: 张文玉(1967-), 男, 硕士, 教授 E-mail: zhangwenyu905@ 163. com 通信作者: 刘先兰(1966-), 女, 博士, 教授 E-mail: 407251701@ qq. com

Reference：

[1] 　Mordike B L, Ebert T. Magnesium: Properties-applications-potential [ J]. Materials Science and Engineering: A, 2001, 302(1): 37-45.

[2] 　李庆芬, 邓彬, 吴远志, 等. 轧制应变量对AZ31 镁合金组织与腐蚀性能的影响[J]. 锻压技术, 2022, 47 (8): 152-157.

Li Q F, Deng B, Wu Y Z, et al. Influence of rolling strain on microstructure and corrosion properties of AZ31 magnesium alloy [J]. Forging & Stamping Technology, 2022, 47 (8) : 152-

157.

[3] 　张玉, 黄晓锋, 郭峰, 等. 热处理工艺对Mg-6Zn-3Al 镁合金显微组织和力学性能的影响[J]. 中国有色金属学报, 2018,28 (6): 1092-1100.

Zhang Y, Huang X F, Guo F, et al. Effects of heat treatment technology on microstructure and mechanical properties of Mg-6Zn-3Al magnesium alloy [J]. The Chinese Journal of Nonferrous Metals,2018, 28 (6): 1092-1100.

[4] 　邓彬, 李庆芬, 吴远志, 等. 高应变速率多向锻造对AZ31 镁合金组织及耐腐蚀性能的影响[J]. 锻压技术, 2021, 46(8): 7-11, 25.

Deng B, Li Q F, Wu Y Z, et al. Influence of high strain rate multi-directional forging on microstructure and corrosion resistance property for AZ31 magnesium alloy [ J]. Forging & Stamping

Technology, 2021, 46 (8): 7-11, 25.

[5] 　宋波, 辛仁龙, 郭宁, 等. 变形镁合金室温应变硬化行为的研究进展[J]. 中国有色金属学报, 2014, 24 (11): 2699 -2710.

Song B, Xin R L, Guo N, et al. Research progress of strain hardening behavior at room temperature in wrought magnesium alloys [J]. The Chinese Journal of Nonferrous Metals, 2014, 24

(11): 2699-2710.

[6] 　吴远志, 严红革, 朱素琴, 等. Mg-Zn-Zr 合金高应变速率多向锻造组织演变及力学性能[J]. 材料研究学报, 2014, 28(2): 144-152.

Wu Z Y, Yan H G, Zhu S Q, et al. Microstruture evolution and mechanical properties of Mg-Zn-Zr alloy during highstrain rate triaxial-forging [J]. Chinese Journal of Materias Research, 2014,28 (2): 144-152.

[7] 　李庆芬, 吴远志, 邓彬, 等. 单道次大应变轧制对AZ31 镁合金组织与耐腐蚀性能的影响[J]. 矿冶工程, 2019, 39 (2):125-127.

Li Q F, Wu Y Z, Deng B, et al. Effect of single-pass large strain rolling on microstructure and corrosion resistance of AZ31 magnesium alloy [J]. Mining and Metallurgical Engineering, 2019, 39(2): 125-127. 　

[8] 　卢立伟, 赵俊, 刘龙飞, 等. 镁合金大塑性变形的研究进展[J]. 材料热处理学报, 2014, 35 (S1): 5-11.

Lu L W, Zhao J, Liu L F, et al. Research achievements of severe plastic deformation on magnesium alloys [J]. Transactions of Materials and Heat Treatment, 2014, 35 (S1): 5-11.

[9] 　吴远志, 严红革, 陈吉华, 等. AZ31 镁合金高应变速率多向锻造组织演变及力学性能[J]. 中国有色金属学报, 2012, 22(11): 3000-3005.

Wu Y Z, Yan H G, Chen J H, et al. Microstructure evolution and mechanical properties of AZ31 magnesium alloy fabricated by high strain rate triaxial-forging [J]. The Chinese Journal of Nonferrous Metals, 2012, 22 (11): 3000-3005.

[10] 吴远志, 严红革, 朱素琴, 等. 多向锻造ZK60 镁合金组织和性能均匀性研究[J]. 中国有色金属学报, 2014, 24 (2):310-316.

Wu Y Z, Yan H G, Zhu S Q, et al. Homogeneity of microstructure and mechanical properties of ZK60 magnesium alloys fabricated by high strain rate triaxial-forging [J]. The Chinese Journal of Nonferrous Metals, 2014, 24 (2): 310-316.

[11] 朱素琴. 中高应变速率轧制制备超细晶镁合金板材原理探索及相关基础研究[D]. 长沙: 湖南大学, 2012.

Zhu S Q. An Exploratory Study on the Principle of the Fabrication of Ultrafine Grained Magnesium Sheets Using Medium-high Strain Rate Rolling Technique and the Related Fundamental Research [D]. Changsha: Hunan University, 2012.

[12] Zhu S Q, Yan H G, Chen J H, et al. Effect of twinning and dynamic recrystallization on the high strain rate rolling process [J]. Scripta Materialia, 2010, 63 (10): 985-988.

[13] Zhu S Q, Yan H G, Liao X Z, et al. Mechanism for enhanced plasticity in magnesium alloy [J]. Acta Materialia, 2015, 82:344-355.

[14] Zhu S Q, Yan H G, Chen J H, et al. Fabrication of Mg-Al-Zn-Mn alloy sheets with homogeneous fine-grained structures using high strain-rate rolling in a wide temperature range [J]. Materials Science and Engineering: A, 2013, 559: 765-772.

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