Effects of Biaxial Pre-Stretching on Microstructures and Mechanical Properties of 2024 Aluminum Alloy Thin Plates

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Biaxial pre-stretching is implemented by bulge forming model. After engraved circular grids on new quenching blank, the specimen is biaxially pre-stretching formed. We use JGX-2 Engineering Microscope to measure principal pre-stretching points with 1.5%-3.1% elongation, which are in plane strain state. Hardness is measured by GYZJ 934-1 type Barcol Hardness and microstructures are observed by JEM-200CX Transmission Electron Microscope. The result shows that the influence on tensile strength of biaxial pre-stretching for new quenching state specimen is not big; however, it is the principal pre-stretching quantity 1.75% that improves microstructure and hardness.

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607-611

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January 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] HUANG Guangjie, JIANG Lingyun: Effect of Heat Treatment Process on Structure and Properties of 2024 Aluminum Alloy. Journal of Chongqing University: Natural Science Edition. 2000, 23(4): 99-102.

Google Scholar

[2] WANG Shuhong, MA Kangmin, MA Jun: Method of Measuring the Residual Stress Distribution in Pre-stretched Aluminum Alloy Plate 7075T7351[J]. Journal of Air Force Engineering University :Natural Science Edition; 2004, 5(3)18-21.

Google Scholar

[3] ZHANG Yuanyuan, WU Yunxin, LI Limin, et al: Finite Element Simulation of Residual Stress in Pre-stretching Thick-plates of 7075 Aluminum Alloy After Quenching[J]. Hot Working Technology. 2008, 37(4): 88-91.

Google Scholar

[4] WANG Cong, LUO Binghui, XIONG Wenying, et al: Effect of pre-stretching on microstructure and mechanical properties of 2024 aluminum alloy plate[J]. Light Alloy Fabrication Technology. 2011, 39(10): 63-68.

Google Scholar

[5] XIAO Daihong, WANG Jiannong, DING Dongyan: Effect of the Pre-stretching Treatment on the Properties and Precipitation of Al-Cu-Mg-Ag Alloy[J]. Hot Working Technology, 2003(4): 1-5.

Google Scholar

[6] NING Ailin, LIU Zhiyi, LIU Zengming: Effects of Aging on Mechanical Properties of 2024Aluminum Alloy by Severe Cold Plastic Deformation[J]. Special Casting & Nonferrous Alloys, 2006, 26(8): 529-532.

Google Scholar

[7] LI Huizhong, LI zhou, LIANG Xaiopeng, et al: Effect of Pre-deformation on Microstructures and Mechanical Properties of Al-Cu-Mn-Mg-Ag Aluminum Alloy[J]. JOURNAL OF AERONAUTICAL MATERIALS, 2009, 29(2): 29-33.

Google Scholar

[8] LI Rongfeng: Development of Biaxial Tensile Testing Technology[J]. Engineering and Test, 2011, 12: 1-4.

Google Scholar

[9] P. Tiernan, A. Hannon: Design optimisation of biaxial tensile test specimenusing finite element analysis[J]. Int J Mater Form, DOI 10. 1007/s12289-012-1105-8.

DOI: 10.1007/s12289-012-1105-8

Google Scholar

[10] REN Jiatao, LI Gangling, DOU Zhiwu, et al: Biaxial Tension Test and the Strengthening of Titanium Sheets under Biaxial Tension. Journal of Experimental Mechanics[J], 2001, 16(2): 196-206.

Google Scholar

[11] The national standardization technical committee of non-ferrous metals. Wrought aluminum and aluminum alloys heat treatment[S]. Beijing Standards Press, (2006).

Google Scholar

[12] The national standardization technical committee of forging. Sheet metal formability and test methods-Forming limit diagram(FLD) test[S]. Beijing Standards Press, (1995).

Google Scholar

[13] National Bureau of Standards. Values of hardness and strength for aluminum alloys conversion tables[S]. Beijing Standards Press, (1983).

Google Scholar

[14] WILSON R N, PARTRIDGE P G: The nucleation and growth of S' precipitates in an aluminium-2. 5%copper-1. 2%magnesium alloy[J]. Acta Metall, 1965, 13(12): 1321-1327.

DOI: 10.1016/0001-6160(65)90043-x

Google Scholar

[15] JENA A K, GUPTA A K, CHATURVEDI M C: A differential scanning calorimetric investigation of precipitation kinetics in the Al-1. 53wt%Cu-0. 79wt% Mg alloy[J]. Aeta Metall, 1989, 37(3): 85-90.

DOI: 10.1016/0001-6160(89)90015-1

Google Scholar

[16] WANG Xiuzhi, LI Hai, WEI Xiuyu, et al: Effects of Prior Strain on Static Tensile Properties and Fatigue Lives of 2E12 Aluminum Alloy[J]. RARE METAL MATERIALS AND ENGINEERING, 2010, 39(1): 138-141.

Google Scholar

[17] ZHANG Xinming, LIU Ling, JIA Yuzhen: Effects of stretching and rolling pre-deformation on microstructures and mechanical properties of 2519A aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(6):1087-1093.

Google Scholar