Mechanical Behavior and Microstructure of Hot Deformation of with Er 7N01 Aluminum Alloy

Abstract:

In this paper, an Al-Zn-Mg-Cu alloy with a small amount of Er and Zr added was used as the research object. The homogenization annealing was carried out, and the 7N01 aluminum alloy was used at 300 °C, 350 °C, 400 °C, 450 °C and 0.1 s^-1, 1 s^-1, 10 s^-1 deformation conditions by Gleeble-3500 thermal simulator. Optical Microscopy (OM), Scanning Electron Microscopy (SEM), Electron Backscatter Diffraction (EBSD) and Transmission Electron Microscopy (TEM) were used for microstructure analysis. The results show that the stress-strain curve of with Er 7N01 aluminum alloy can be divided into micro-strain stage, uniform deformation stage and steady-state flow stage during the thermal compression process. The flow stress of 7N01 aluminum alloy achieved peaks at the initial stage of strain, and then increased with the increase of strain rate and the decrease of deformation temperature. With the increase of deformation temperature and the decrease of deformation rate, the recrystallization process was significantly increased.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 294-298
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.294
• Online since: May 2020
• Authors: Bo Hou Zhang, Bo Long Li*, Peng Qi, Ning Li, Tong Bo Wang, Zuo-Ren Nie
• Keywords: 7N01 Aluminum Alloy, Er, Flow Stress, Hot Compression, Microstructure

References

[1] W. Liu, A. Bao, Microstructure and properties of ceramic coatings on 7N01 aluminum alloy by micro-arc oxidation, Procedia Eng. 27 (2012) 828-832.

DOI: 10.1016/j.proeng.2011.12.527

[2] B. Li, X. Wang, H. Chen et al., Influence of heat treatment on the strength and fracture toughness of 7N01 aluminum alloy, Journal of Alloys and Compounds. 678 (2016) 160-166.

DOI: 10.1016/j.jallcom.2016.03.228

[3] L. Chen, G. Zhao, J. Yu, W. Zhang, Constitutive analysis of homogenized 7005 aluminum alloy at evaluated temperature for extrusion process, Mater. Des. 66 (2015) 129-136.

DOI: 10.1016/j.matdes.2014.10.045

[4] W. Li, Q. Pan, L. Zou et al., Effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys, Rare Metals. 28 (2009) 102-106.

DOI: 10.1007/s12598-009-0020-8

[5] H.Y. Li, Z.H. Gao, H. Yin, H.F. Jiang, X.J Sua and J. Bin, Effects of Er and Zr additions on precipitation and recrystallization of pure aluminum, Scripta Materialia. 68 (2013) 59–62.

DOI: 10.1016/j.scriptamat.2012.09.026

[6] S. Costa, H. Puga, J. Barbosa, The effect of Sc additions on the microstructure and age hardening behavior of as cast Al–Sc alloys, Pinto AMP Mater. Des. 42 (2012) 347-452.

DOI: 10.1016/j.matdes.2012.06.019

[7] L.M. Wu , W.H. Wang , Y.F. Hsu et al., Effects of homogenization treatment on recrystallization behavior and dispersoid distribution in an Al–Zn–Mg–Sc–Zr alloy,Journal of Alloys and Compounds. 456 (2008) 163-169.

DOI: 10.1016/j.jallcom.2007.02.054

[8] H. Wu , S.P. Wen , H. Huang et al., Hot deformation behavior and processing map of a new type Al-Zn-Mg-Er-Zr alloy. Journal of Alloys and Compounds, 685 (2016) 869-880.

DOI: 10.1016/j.jallcom.2016.06.254

[9] S.P. Wen, K.Y. Gao, Y. Li, H. Huang and Z.R. Nie, Synergetic effect of Er and Zr on the precipitation hardening of Al–Er–Zr alloy, Scripta Materialia. 65 (2011) 592–595.

DOI: 10.1016/j.scriptamat.2011.06.033

[10] B. Wu, M.Q. Li, D.W. Ma, The flow behavior and constitutive equations in isothermal compression of 7050 aluminum alloy, Materials Science & Engineering A. 542 (2012) 79-87.

DOI: 10.1016/j.msea.2012.02.035

[11] D. W. Ma, M.Q. Li , J. Luo et al., Flow stress model considering contribution of strain in isothermal compression of 7A09 aluminum alloy, Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals. 21 (2011) 954-960.

[12] Rokni M R, Zarei-Hanzaki A, Roostaei A A et al., An investigation into the hot deformation characteristics of 7075 aluminum alloy, Materials & Design. 32 (2011) 2339-2344.

DOI: 10.1016/j.matdes.2010.12.047

[13] J.Shen, S. S. Xie, Dynamic recovery and dynamic recrystallization of 7005 aluminium alloy during hot compression, Acta Metallurgica Sinica. 1 (2000) 379-386.