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

doi:10.1088/1674-1056/25/10/106201

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 (σ_b) 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 σ_b 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.

Keywords: 2024 aluminum alloy tensile strength elongation magneto plasticity effect

Received: 14 May 2016
Revised: 28 June 2016
Accepted manuscript online:

PACS:	62.20.-x	(Mechanical properties of solids)
	81.40.Lm	(Deformation, plasticity, and creep)
	61.72.Lk	(Linear defects: dislocations, disclinations)

Fund: 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).

Corresponding Authors: Gui-Rong Li
E-mail: liguirong@ujs.edu.cn

Cite this article:

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) Tensile properties and microstructure of 2024 aluminum alloy subjected to the high magnetic field and external stress 2016 Chin. Phys. B 25 106201

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

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