Microstructure Evolution of As-Cast Nickel Aluminum Bronze under Electropulsing

Abstract:

In this work, the microstructure evolution of as-cast NAB under different electropulsing parameters were studied. The microstructure of the electropulsing treatment (EPT) sample was characterized by mircohardness test and optical microscopy. The results show that compared with heat treatment, when the peak current density reaches 5.84×10⁸A/m² (no significant change in the structure when the peak current density is lower), the β' phase region undergo phase transition in a shorter time. When the peak current density reaches 7.25×10⁸A/m², the sample is significantly affected by the Joule heating effect, and the κ_Ⅲ and κ_Ⅳ phases are successively dissolved to form Widmanstätten α structure. As the β' phase increases and the Widmanstätten α structure forms, the hardness value of the microstructure increases by 80%.

• Periodical: Key Engineering Materials (Volume 861)
• Pages: 28-34
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.861.28
• Online since: September 2020
• Authors: Jie Fang, Guo Lin Song, Wei Liu, Qiu Lin Li*
• Keywords: Electropulsing, Hardness, Microstructure, Nickel Aluminum Bronze, Phase Transition

References

[1] Lv, Y., et al, Recent advances of nickel-aluminum bronze (NAB), Rare Metal Materials & Engineering (2016).

[2] Moussa, M. E., M. A. Waly, and M. Amin, Effect of high intensity ultrasonic treatment on microstructural modification and hardness of a nickel-aluminum bronze alloy, J. Alloys Compd. 741(2018):804-813.

DOI: 10.1016/j.jallcom.2018.01.218

[3] Culpan, E. A., and J. T. Barnby, The metallography of fracture in cast nickel aluminium bronze, Journal of Materials Science 13.2(1978):323-328.

DOI: 10.1007/bf00647776

[4] Thossatheppitak, Borpit, et al, Mechanical Properties at High Temperatures and Microstructures of a Nickel Aluminum Bronze Alloy, Advanced Materials Research 683(2013):82-89.

DOI: 10.4028/www.scientific.net/amr.683.82

[5] Lv, Yuting, et al, Influences of heat treatment on fatigue crack growth behavior of NiAl bronze (NAB) alloy, Journal of Materials Research 30.20(2015):3041-3048.

DOI: 10.1557/jmr.2015.282

[6] G.R.E.A. Culpan, Microstructural characterization of cast nickel aluminium bronze, J. Mater. Sci., 13 (8) (1978) 1647-1657.

DOI: 10.1007/bf00548728

[7] Hasan, F., et al, The morphology, crystallography, and chemistry of phases in as-cast nickel-aluminum bronze, Metallurgical Transactions A 13.8(1982):1337-1345.

DOI: 10.1007/bf02642870

[8] Culpan, E. A., and G. Rose, Microstructural characterization of cast nickel aluminium bronze, Journal of Materials Science 13.8(1978):1647-1657.

DOI: 10.1007/bf00548728

[9] Oh-Ishi, Keiichiro, and T. R. Mcnelley, Microstructural modification of as-cast NiAl bronze by friction stir processing, Metallurgical and Materials Transactions A (Physical Metallurgy and, Materials Science) 35.9(2004):2951-2961.

DOI: 10.1007/s11661-004-0242-1

[10] Lv, Yuting, et al, Investigation of microstructure and mechanical properties of hot worked NiAl bronze alloy with different deformation degree, Materials Science and Engineering: A 643(2015):17-24.

DOI: 10.1016/j.msea.2015.06.078

[11] Anantapong, J., et al, Effect of hot working on microstructure evolution of as-cast Nickel Aluminum Bronze alloy, Materials & Design 60(2014):233-243.

DOI: 10.1016/j.matdes.2014.03.033

[12] Z. B. Qin, Q. Zhang, Q. Luo, et al, Microstructure design to improve the corrosion and cavitation corrosion resistance of a nickel-aluminum bronze, Corros. Sci. 139 (2018) 255–266.

DOI: 10.1016/j.corsci.2018.04.043

[13] Liang, Chien Lung, and K. L. Lin, The microstructure and property variations of metals induced by electric current treatment: A review, Materials Characterization 145(2018):545-555.

DOI: 10.1016/j.matchar.2018.08.058

[14] Samuel, Edwin I., A. Bhowmik, and R. Qin, Accelerated spheroidization induced by high intensity electric pulse in a severely deformed eutectoid steel, Journal of Materials Research 25.06(2010):1020-1024.

DOI: 10.1557/jmr.2010.0140

[15] Zhao, Zhiyong, et al, Fast recrystallization and phase transformation in ECAP deformed Ti–6Al–4V alloy induced by pulsed electric current, J. Alloys Compd. (2019).

DOI: 10.1016/j.jallcom.2019.01.328

[16] Sun, Yongan, et al, Improvement of surface resistance to cavitation corrosion of nickel aluminum bronze by electropulsing-assisted ultrasonic surface rolling process, Surface and Coatings Technology (2019).

DOI: 10.1016/j.surfcoat.2019.03.045

[17] Gao, Menglin, et al, Reverse evolution in nanoscale Cu-rich precipitates of an aged Fe–Cu alloy under electropulsing, Philosophical Magazine Letters 99.1(2019):1-9.

DOI: 10.1080/09500839.2019.1615147

[18] Elliottbowman, B, and R. Qin, The effects of electropulsing on metallic materials, (2015).

[19] R. Zhu, Y. Jiang, L. Guan, H. Li, G. Tang, Difference in recrystallization between electropulsing-treated and furnace-treated NiTi alloy, J. Alloys Compd. 658 (2016) 548-554.

DOI: 10.1016/j.jallcom.2015.10.239

[20] M.D. Fuller, et al, Microstructural transformations and mechanical properties of cast NiAl bronze: Effects of fusion welding and friction stir processing, Materials Science and Engineering: A 463.1-2(2007):128-137.

DOI: 10.1016/j.msea.2006.07.157

[21] Nelson EA, Microstructural effects of multiple passes during friction stir processing of nickel aluminum bronze, Thesis at Naval postgraduate school, Monterey, California; (2009).