Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-10T10:02:30.422Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of microstructure and mechanical property heterogeneity throughout the wall thickness of high strength aluminum alloy thick-wall pipe

Published online by Cambridge University Press:  19 July 2019

Gaoyong Lin ,
Weiyuan Song ,
Di Feng ,
Kun Li ,
Yongping Feng  and
Jinxia Liu
Gaoyong Lin*
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, People’s Republic of China; and Key Lab of Nonferrous Materials, Ministry of Education, Central South University, Changsha, Hunan 410083, People’s Republic of China
Weiyuan Song
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, People’s Republic of China; and Key Lab of Nonferrous Materials, Ministry of Education, Central South University, Changsha, Hunan 410083, People’s Republic of China
Di Feng
Affiliation:
Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Jiangsu 212003, People’s Republic of China
Kun Li
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, People’s Republic of China; and Key Lab of Nonferrous Materials, Ministry of Education, Central South University, Changsha, Hunan 410083, People’s Republic of China
Yongping Feng
Affiliation:
Fujian Xiangxin Shares Co., Ltd., Fuzhou 350000, People’s Republic of China
Jinxia Liu
Affiliation:
Fujian Xiangxin Shares Co., Ltd., Fuzhou 350000, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: mater218@163.com
Get access

Abstract

Differences in pipe wall microstructure at various positions throughout the wall thickness of high strength aluminum alloy thick-wall pipes produced by reverse hot extrusion were investigated. The microstructures of the inner wall (IW), outer wall (OW), and half wall (HW) were compared. Further, heterogeneity in the mechanical properties of the pipe throughout the wall thickness was also investigated. Results revealed that the volume fraction of precipitation was highest at the HW position because of the higher Zn and Mg contents. Further, approximately 26% of grains were recrystallized in the OW position due to the greater strain during extrusion, while the recrystallization fractions of the IW and HW positions were 13% and 21%, respectively. The effects of precipitation strengthening and deformation strengthening contribute to the highest ultimate tensile strength and Vickers hardness of the HW position, and to the higher elongation of the IW and OW positions.

Keywords

high strength aluminum alloythick-wall pipeprecipitationrecrystallizationheterogeneity of properties
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 15 , 14 August 2019 , pp. 2736 - 2745
Check for updates
Copyright
Copyright © Materials Research Society 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Mondal, C., Mukhopadhyay, A.K., Raghu, T., and Varma, V.K.: Tensile properties of peak aged 7055 aluminum alloy extrusions. Mater. Sci. Eng., A 454, 673 (2007).CrossRefGoogle Scholar
Dursun, T. and Soutis, C.: Recent developments in advanced aircraft aluminium alloy. Mater. Des. 56, 862 (2014).CrossRefGoogle Scholar
Su, R., Qu, Y., You, J., and Li, R.: Study on a new retrogression and re-aging treatment of spray formed Al–Zn–Mg–Cu alloy. J. Mater. Res. 31, 573 (2106).CrossRefGoogle Scholar
Lin, Y.C., Wang, Z.W., He, D.G., Zhou, Y., Chen, M-S., Huang, M-H., and Zhang, J-L.: Effects of pre-treatments on precipitate microstructures and creep-rupture behavior of an Al–Zn–Mg–Cu alloy. J. Mater. Res. 31, 1286 (2016).CrossRefGoogle Scholar
Feng, D., Wang, G., Chen, H., and Zhang, X.: The effect of grain size inhomogeneity of ingot on dynamic softening behavior and processing map of Al–8Zn–2Mg–2Cu alloy. Met. Mater. Int. 24, 195 (2018).CrossRefGoogle Scholar
Cong, F., Zhao, G., Jiang, F., Tian, N., and Li, R.: Effect of homogenization treatment on microstructure and mechanical properties of DC cast 7X50 aluminum alloy. Trans. Nonferrous Met. Soc. 25, 1027 (2015).CrossRefGoogle Scholar
Chen, K., Liu, H., Zhang, Z., Li, S., and Todd, R.: The improvement of constituent dissolution and mechanical properties of 7055 aluminum alloy by stepped heat treatments. J. Mater. Process. Technol. 142, 190 (2003).CrossRefGoogle Scholar
Huda, Z. and Edi, P.: Materials selection in design of structures and engines of supersonic aircrafts: A review. Mater. Des. 46, 552 (2013).CrossRefGoogle Scholar
Chen, J., Zhen, L., Shao, W., Dai, S., and Cui, Y.: Through-thickness texture gradient in AA 7055 aluminum alloy. Mater. Lett. 62, 88 (2012).CrossRefGoogle Scholar
Liu, S., Zhang, Y., Liu, W., Den, Y., and Zhang, X.: Effect of step-quenching on microstructure of aluminum alloy 7055. Trans. Nonferrous Met. Soc. 20, 1 (2010).CrossRefGoogle Scholar
Liu, S., Li, C., Han, S., Den, Y., and Zhang, X.: Effect of natural aging on quench-induced inhomogeneity of microstructure and hardness in high strength 7055 aluminum alloy. J. Alloys Compd. 625, 34 (2015).CrossRefGoogle Scholar
She, H., Shu, D., Wang, J., and Sun, B.: Influence of multi-microstructural alterations on tensile property inhomogeneity of 7055 aluminum alloy medium thick plate. Mater. Char. 113, 189 (2016).CrossRefGoogle Scholar
Prime, M. and Hill, M.: Residual stress, stress relief, and inhomogeneity in aluminum plate. Scripta Mater. 46, 77 (2002).CrossRefGoogle Scholar
Yan, L., Shen, J., Li, Z., and Li, J.: Effect of deformation temperature on microstructure and mechanical properties of 7055 aluminum alloy after heat treatment. Trans. Nonferrous Met. Soc. 23, 625 (2013).CrossRefGoogle Scholar
Liu, S., Zhang, X., Chen, M., and You, J.: Influence of aging on quench sensitivity effect of 7055 aluminum alloy. Trans. Nonferrous Met. Soc. 59, 53 (2008).Google Scholar
Li, C., Zhang, X., Han, S., Liu, S., and Den, Y.: Effect of aging on quench-induced inhomogeneity of 7085 aluminum alloy thick plate. Chin. J. Nonferrous Met. 46, 2824 (2016).Google Scholar
Gu, W., Li, J., and Wang, Y.: Effect of grain size and Taylor factor on the transverse mechanical properties of 7050 aluminium alloy extrusion profile after over-aging. Acta Metall. Sin. 52, 51 (2016).Google Scholar
Williams, J.: The effect of material inhomogeneity on the creep deformation of a thick walled pipe. Int. J. Pressure Vessels Piping 11, 1 (1983).CrossRefGoogle Scholar
Li, M., Yang, Y., Feng, Z., Huang, B., Luo, X., Lou, X., Lou, J., and Ru, J.: Precipitation sequence of η phase along low-angle grain boundaries in Al–Zn–Mg–Cu alloy during artificial aging. Trans. Nonferrous Met. Soc. 24, 2061 (2014).CrossRefGoogle Scholar
Li, X., Hansen, V., Gjønnes, J., and Wallenberg, L.: HREM study and structure modeling of the η′ phase, the hardening precipitates in commercial Al–Zn–Mg alloy. Acta Mater. 47, 2651 (1999).CrossRefGoogle Scholar
She, H., Shu, D., Chu, W., Wang, J., and Sun, B.: Microstructural aspects of second phases in as-cast and homogenized 7055 aluminum alloy with different impurity contents. Metall. Mater. Trans. A 44, 3504 (2013).CrossRefGoogle Scholar
Marlaud, T., Deschamps, A., Bley, F., Lefebvre, W., and Barouxa, B.: Influence of alloy composition and heat treatment on precipitate composition in Al–Zn–Mg–Cu alloys. Acta Mater. 58, 248 (2010).CrossRefGoogle Scholar
Lakshminarayanan, A. and Balasubramanian, V.: Process parameters optimization for friction stir welding of RDE-40 aluminium alloy using Taguchi technique. Trans. Nonferrous Met. Soc. 18, 548 (2008).CrossRefGoogle Scholar
Liu, Y., Jiang, D., Li, B., Ying, T., and Hu, J.: Heating aging behavior of Al–8.35Zn–2.5Mg–2.25Cu alloy. Mater. Des. 60, 116 (2014).CrossRefGoogle Scholar
Feng, D., Zhang, X., Liu, S., Wu, Z., Guo, Y., and Yu, W.: Inhomogeneity of microstructure and properties of 7A55 aluminium alloy thick plate. J. Cent. South Univ. 46, 2824 (2015).Google Scholar
Lee, J., Kim, B., and Kang, C.: Effects of chamber shapes of porthole die on elastic deformation and extrusion process in condenser tube extrusion. Mater. Des. 26, 327 (2005).CrossRefGoogle Scholar
Starink, M. and Wang, S.: A model for the yield strength of overaged Al–Zn–Mg–Cu alloys. Acta Mater. 51, 5131 (2003).CrossRefGoogle Scholar
Liu, Y., Jiang, D., Xie, W., Hu, J., and Ma, B.: Solidification phases and their evolution during homogenization of a DC cast Al–8.35Zn–2.5Mg–2.25Cu alloy. Mater. Char. 93, 173 (2014).CrossRefGoogle Scholar