中国物理B ›› 2016, Vol. 25 ›› Issue (10): 106201-106201.doi: 10.1088/1674-1056/25/10/106201

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Tensile properties and microstructure of 2024 aluminum alloy subjected to the high magnetic field and external stress

Gui-Rong Li(李桂荣), Fei Xue(薛飞), Hong-Ming Wang(王宏明), Rui Zheng(郑瑞), Yi Zhu(朱弋), Qiang-Ze Chu(储强泽), Jiang-Feng Cheng(程江峰)   

  1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
  • 收稿日期:2016-05-14 修回日期:2016-06-28 出版日期:2016-10-05 发布日期:2016-10-05
  • 通讯作者: Gui-Rong Li E-mail:liguirong@ujs.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51371091, 51174099, and 51001054) and the Industrial Center of Jiangsu University, China (Grant No. ZXJG201586).

Tensile properties and microstructure of 2024 aluminum alloy subjected to the high magnetic field and external stress

Gui-Rong Li(李桂荣), Fei Xue(薛飞), Hong-Ming Wang(王宏明), Rui Zheng(郑瑞), Yi Zhu(朱弋), Qiang-Ze Chu(储强泽), Jiang-Feng Cheng(程江峰)   

  1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2016-05-14 Revised:2016-06-28 Online:2016-10-05 Published:2016-10-05
  • Contact: Gui-Rong Li E-mail:liguirong@ujs.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51371091, 51174099, and 51001054) and the Industrial Center of Jiangsu University, China (Grant No. ZXJG201586).

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摘要： In order to explore the dependence of plasticity of metallic material on a high magnetic field, the effects of the different magnetic induction intensities (H= 0 T, 0.5 T, 1 T, 3 T, and 5 T) and pulses number (N = 0, 10, 20, 30, 40, and 50) on tensile strength (σb) and elongation (δ) of 2024 aluminum alloy are investigated in the synchronous presences of a high magnetic field and external stress. The results show that the magnetic field exerts apparent and positive effects on the tensile properties of the alloy. Especially under the optimized condition of H*=1 T and N*=30, the σb and δ are 410 MPa and 17% that are enhanced by 9.3% and 30.8% respectively in comparison to those of the untreated sample. The synchronous increases of tensile properties are attributed to the magneto-plasticity effect on a quantum scale. That is, the magnetic field will accelerate the state conversion of radical pair generated between the dislocation and obstacles from singlet to the triplet state. The bonding energy between them is meanwhile lowered and the moving flexibility of dislocations will be enhanced. At H*=1 T and N*=30, the dislocation density is enhanced by 1.28 times. The relevant minimum grain size is 266.1 nm, which is reduced by 35.2%. The grain refining is attributed to the dislocation accumulation and subsequent dynamic recrystallization. The (211) and (220) peak intensities are weakened. It is deduced that together with the recrystallization, the fine grains will transfer towards the slip plane and contribute to the slipping deformation.

关键词: 2024 aluminum alloy, tensile strength, elongation, magneto plasticity effect

Abstract: In order to explore the dependence of plasticity of metallic material on a high magnetic field, the effects of the different magnetic induction intensities (H= 0 T, 0.5 T, 1 T, 3 T, and 5 T) and pulses number (N = 0, 10, 20, 30, 40, and 50) on tensile strength (σb) and elongation (δ) of 2024 aluminum alloy are investigated in the synchronous presences of a high magnetic field and external stress. The results show that the magnetic field exerts apparent and positive effects on the tensile properties of the alloy. Especially under the optimized condition of H*=1 T and N*=30, the σb and δ are 410 MPa and 17% that are enhanced by 9.3% and 30.8% respectively in comparison to those of the untreated sample. The synchronous increases of tensile properties are attributed to the magneto-plasticity effect on a quantum scale. That is, the magnetic field will accelerate the state conversion of radical pair generated between the dislocation and obstacles from singlet to the triplet state. The bonding energy between them is meanwhile lowered and the moving flexibility of dislocations will be enhanced. At H*=1 T and N*=30, the dislocation density is enhanced by 1.28 times. The relevant minimum grain size is 266.1 nm, which is reduced by 35.2%. The grain refining is attributed to the dislocation accumulation and subsequent dynamic recrystallization. The (211) and (220) peak intensities are weakened. It is deduced that together with the recrystallization, the fine grains will transfer towards the slip plane and contribute to the slipping deformation.

Key words: 2024 aluminum alloy, tensile strength, elongation, magneto plasticity effect

中图分类号:  (Mechanical properties of solids)

  • 62.20.-x
81.40.Lm (Deformation, plasticity, and creep) 61.72.Lk (Linear defects: dislocations, disclinations)