| 165 | 0 | 102 |
| 下载次数 | 被引频次 | 阅读次数 |
为探明脉冲电流密度对AZ31镁合金铸轧板微观组织演化及性能强化机制的影响，设计了4种电流密度对比实验。结果表明，随着电流密度的增加，镁合金逐渐发生静态再结晶，促进了晶粒细化。然而，过大的电流密度则会导致晶粒长大，降低合金强度。此外，脉冲电流可促使β-Mg17Al12相发生溶解，加速位错滑移启动。在晶粒细化和第二相溶解的交互影响下，30 A·mm-2电流密度处理的AZ31镁合金铸轧板抗拉强度提升了约11.62%,伸长率提升了约87.14%,显微硬度提升了11.66%。脉冲电流参数优化可实现镁合金铸轧板的强塑性协同提升，为制备高性能镁合金铸轧板提供理论依据。
Abstract：To investigate the effect of pulse current desity on the microstructure evolution and performance strengthening mechanism of AZ31 magnesium alloy cast-rolling plate, four current density comparative experiments were designed. The results indicate that as the current density increases, the magnesium alloy gradually undergoes static recrystallization, promoting grain refinement. However, excessive current density can lead to grain growth and reduce alloy strength. In addition, pulse current can promote the dissolution of β-Mg17Al12 phase and accelerate the initiation of dislocation slip. Under the interaction of grain refinement and the second phase dissolution, the tensile strength of AZ31 magnesium alloy cast-rolling plate treated with current density of 30 A·mm-2 is increased by about 11.62%, elongation is increased by about 87.14%, and microhardness is increased by 11.66%. The optimization of pulse current parameters can achieve the synergistic improvement in the strength and plasticity of magnesium alloy cast-rolling plate, providing a theoretical basis for the preparation of high-performance magnesium alloy cast-rolling plate.
[1] GUPTA M,WONG W L E.Magnesium-based nanocomposites:Lightweight materials of the future[J].Materials Characterization,2015,105:30-46.
[2] JIA W,MA L,LE Q,et al.Deformation and fracture behaviors of AZ31B Mg alloy at elevated temperature under uniaxial compression[J].Journal of Alloys and Compounds,2019,783:863-876.
[3] 白珊，王仪青，卢云，等.温电耦合轧制中预热温度对AZ31镁合金铸轧板组织及性能的影响[J].锻压技术，2025,50(1):113-121.BAI Shan,WANG Yiqing,LU Yun,et al.Effect of preheating temperature on microstructure and properties for AZ31 magnesium alloy cast-rolled sheet in thermo-electropulsing rolling[J].Forging & Stamping Technology,2025,50(1):113-121.
[4] 乔斗，马引虎，周立端，等.均质化热处理对AZ80镁合金显微组织和力学性能的影响[J].中国铸造装备与技术，2024,59(6):47-51.QIAO Dou,MA Yinhu,ZHOU Liduan,et al.Effect of homogenization heat treatment on the microstructure and mechanical properties of AZ80 magnesium alloy[J].China Foundry Machinery & Technology,2024,59(6):47-51.
[5] 王鑫，周舸，刘超，等.退火温度对Ti-6Al-4V合金超塑性组织与性能的影响[J].塑性工程学报，2020,27(11):195-201.WANG Xin,ZHOU Ge,LIU Chao,et al.Effects of annealing temperature on superplastic organization and performance of Ti-6Al-4V alloy[J].Journal of Plasticity Engineering,2020,27(11):195-201.
[6] 蒋瑞鑫，韩国峰，牛宗伟，等.热处理对CMT电弧增材沉积Inconel 625合金组织与性能的影响[J].金属热处理，2024,49(10):25-31.JIANG Ruixin,HAN Guofeng,NIU Zongwei,et al.Effect of heat treatment on microstructure and properties of CMT arc additive deposited Inconel 625 alloy[J].Heat Treatment of Metals,2024,49(10):25-31.
[7] 侯浪，李军，刘颖.热处理对铸态Fe-Cr-W-B合金微观结构与力学性能的影响[J].四川冶金，2024,46(4):67-71.HOU Lang,LI Jun,LIU Ying.Effect of heat treatment on microstructure and mechanical properties of as-cast Fe-Cr-W-B alloy[J].Sichuan Metallurgy,2024,46(4):67-71.
[8] 黄晓锋，张展裕，杨凡，等.热处理对Mg-7Zn-0.3La合金组织和力学性能的影响[J].热加工工艺，2025,(9):37-41.HUANG Xiaofeng,ZHANG Zhanyu,YANG Fan,et al.Effects of heat treatment on microstructure and mechanical properties of Mg-7Zn-0.3La alloy[J].Hot Working Technology,2025,(9):37-41.
[9] 彭林法，黄纪绘，徐竹田，等.脉冲电流作用下金属材料的相变行为[J].塑性工程学报，2023,30(6):111-124.PENG Linfa,HUANG Jihui,XU Zhutian,et al.Electropulsing-induced phase transformation behavior in metal materials[J].Journal of Plasticity Engineering,2023,30(6):111-124.
[10] WU H F,FAN J F,SHAN Z H,et al.Mechanical properties of bimodal AZ91 alloy prepared by low-temperature slow rate extrusion and electrical pulse treatment [J].Rare Metal Materials and Engineering,2021,50(3):0807-0815.
[11] JIANG Y B,TANG G Y,SHEK C H,et al.Effect of electropulsing treatment on microstructure and tensile fracture behavior of aged Mg-9Al-1Zn alloy strip[J].Applied Physics A-Materials Science & Processing,2009,97(3):607-615.
[12] 王彬杉，徐光，任睿，等.脉冲电流对AZ91镁合金温挤压过程中动态析出和微观组织的影响[J].金属学报，2025,61(1):129-142.WANG Binshan,XU Guang,REN Rui,et al.Effect of electropulse on dynamic precipitation and microstructure of AZ91 magnesium alloy during warm extrusion[J].Acta Metallurgica Sinica,2025,61(1):129-142.
[13] 彭家辉，周全.脉冲电流处理对冷轧态LZ91镁合金显微组织及力学性能的影响[J].材料热处理学报，2024,45(11):75-84.PENG Jiahui,ZHOU Quan.Effect of electron pulse treatment on microstructure and mechanical properties of cold-rolled LZ91 magnesium alloy[J].Transactions of Materials and Heat Treatment,2024,45(11):75-84.
[14] ASTM E8/E8M-21,金属材料拉伸试验方法[S].ASTM E8/E8M-21,Standard test methods for tension testing of metallic materials[S].
[15] 刘阳，樊建锋，靳伟，等.电脉冲对轧制AZ31镁合金组织与性能的影响[J].稀有金属材料与工程，2016,45(10):2687-2691.LIU Yang,FAN Jianfeng,Jin Wei,et al.Effect of electropulsing treatment on microstructure and properties of rolled AZ31 alloy[J].Rare Metal Materials and Engineering,2016,45(10):2687-2691.
[16] 黄志权，黄庆学，马立峰，等.宽幅AZ31B镁合金铸轧板显微组织和性能研究[J].材料研究学报，2013,27(3):292-298.HUANG Zhiquan,HUANG Qingxue,MA Lifeng,et al.Study on microstructure and properties of the broadloom AZ31B magnesium alloy roll-casting plate[J].Chinese Journal of Materials Research,2013,27(3):292-298.
[17] 潘复生，韩思厚.高性能变形镁合金及加工技术[M].北京：科学出版社，2007.
[18] KIM W J,LEE J B,KIM W Y,et al.Microstructure and mechanical properties of Mg-Al-Zn alloy sheets severely deformed by asymmetrical rolling[J].Scripta Materialia,2007,56(4):309-312.
[19] KHAN A S,PANDEY A,GN?UPEL-HEROLD T,et al.Mechanical response and texture evolution of AZ31 alloy at large strains for different strain rates and temperatures[J].International Journal of Plasticity,2011,27(5):688-706.
[20] 章欧，胡红军，胡刚，等.镁合金复合细晶强化研究进展[J].精密成形工程，2021,13(6):98-105.ZHANG Ou,HU Hongjun,HU Gang,et al.Research progress on composite refinement strengthening of magnesium alloy[J].Journal of Netshape Forming Engineering,2021,13(6):98-105.
[21] 王忠堂，马康，梁海成，等.AZ31镁合金板材双向循环弯曲的孪晶组织及织构[J].稀有金属材料与工程，2016,45(10):2746-2751.WANG Zhongtang,MA Kang,LIANG Haicheng,et al.Twins and texture of AZ31 magnesium alloy sheet deformed by bidirectional cyclic bending technology[J].Rare Metal Materials and Engineering,2016,45(10):2746-2751.
基本信息:
中图分类号:TG146.22
引用信息:
[1]邹金超,蔡国峰,张苗苗,等.脉冲电流处理AZ31镁合金铸轧板微观组织演化及性能强化机制[J].塑性工程学报,2026,33(01):147-154.
基金信息:
国家自然科学基金资助项目(52404408); 山西省基础研究计划项目(202403021222208); 优秀来晋博士科研项目(20242090); 校级博士科研启动金资助项目(20242039)
2026-01-16
2026-01-16
2026-01-16