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http://dx.doi.org/10.12656/jksht.2022.35.4.177

Effects of Zn Addition on Hardness and Microstructure of Discontinuous Precipitates in Isothermally Aged Mg-Al-(Zn) Alloys  

Jun, Joong-Hwan (Industrial Materials Processing R&D Department, Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Society for Heat Treatment / v.35, no.4, 2022 , pp. 177-184 More about this Journal
Abstract
The present study aims to investigate the influence of Zn addition on hardness and microstructural characteristics of discontinuous precipitates (DPs) formed by isothermal aging in Mg-9%Al and Mg-9%Al-1%Zn alloys. To obtain large DPs volume fractions in the microstructure, the alloy specimens were solution-treated at 688 K for 24 h followed by water quenching, and then aged at 413 K for 48 h. The aged Mg-9%Al-1%Zn alloy had higher DPs content than the Mg-9%Al alloy, indicating that the Zn addition plays a beneficial role in enhancing age-hardening response. The DPs in the Zn-containing alloy possessed the higher hardness than those of the Zn-free alloy. Microstructural examination revealed that the increased hardness of the DPs resulting from the Zn addition is closely associated with the lower α-(Mg)/β(Mg17Al12) interlamellar spacing and the higher volume fraction of β phase layer of the DPs.
Keywords
Mg-Al-(Zn) alloy; Isothermal aging; Discontinuous precipitates; Hardness change; Interlamellar spacing;
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1 J. Song, J. She, D. Chen, and F. Pan : J. Magnes. Alloy. 8 (2020) 1.   DOI
2 S. Li, X. Yang, J. Hou, and W. Du : J. Magnes. Alloy. 8 (2020) 78.   DOI
3 J. Zhang, R. J. Perez, and E. J. Lavernia : J. Mater. Sci. 28 (1993) 2395.   DOI
4 J. Hao, J. Zhang, H. Wang, W. Cheng, and Y. Bai : J. Mater. Res. Tech. 19 (2022) 1650.   DOI
5 E. Gerashi, M. Asadollahi, R. Alizadeh, and R. Mahmudi : Mater. Sci. Eng. A 843 (2022) 143127.   DOI
6 H. Xue, S. Liu, W. Xie, Y. Zhou, J. Peng, H. Pan, D. Zhang, and F. Pan : Mater. Char. 187 (2022) 111874.   DOI
7 S. Takeshita, C. Watanabe, R. Monzen, and S. Saikawa : J. Jpn. Inst. Light Met. 64 (2014) 470.   DOI
8 D. He, Y. Li, Y. Zheng, X. Yue, Y. Wu, X. Xue, H. Yu, W. Li, and Y. Li : J. Alloy. Compd. 887 (2021) 161317.   DOI
9 J. H. Zhang, K. B. Nie, K. K. Deng, X. Z. Han, and Z. D. Wang : Mater. Sci. Eng. A 838 (2022) 142562.   DOI
10 Z. Zareian, M. Emamy, M. Malekan, H. Mirzadeh, W. J. Kim, and A. Bahmani : Mater. Sci. Eng. A 774 (2020) 138929.   DOI
11 X. Hua, Q. Yang, D. Zhang, F. Meng, C. Chen, Z. You, J. Zhang, S. Lv, and J. Meng : J. Mater. Sci. Tech. 53 (2020) 174.   DOI
12 M. D. Nave, A. K. Dahle, and D. H. StJohn : Magnesium Technology, TMS, 2000, p. 233.
13 D. Duly, Y. Brechet, and B. Chenal : Acta Metall. 40 (1992) 2289.   DOI
14 C. Q. Liu, H. W. Chen, N. C. Wilson, and J. F. Nie : Scr. Mater. 163 (2019) 91.   DOI
15 C. Zener : Trans. AIME 167 (1946) 550.
16 M. Frebel and K. Behler : Metall. Trans. A 8 (1977) 621.   DOI
17 M. X. Zhang and P. M. Kelly : Scr. Mater. 48 (2003) 647.   DOI
18 M. D. Nave, A. K. Dahle, and D. H. StJohn : Magnesium Technology, TMS, 2000, p. 243.
19 X. J. Wang, S. M. Zhu, E. A. Easton, M. A. Gibson, and G. Savage : Int. J. Cast Met. Res. 27 (2014) 161.   DOI
20 J. B. Clark : Acta Metall. 16 (1968) 141.   DOI
21 K. N. Braszczynska-Malik : J. Alloy. Compd. 477 (2009) 870.   DOI
22 C. H. Caceres, C. J. Davidson, J. R. Griffiths, and C. L. Newton : Mater. Sci. Eng. A 325 (2002) 344.   DOI
23 C. R. Hutchinson, J. F. Nie, and S. Gorsse : Metall. Mater. Trans. A 36 (2005) 2093.   DOI
24 J. D. Robson : Acta Mater. 61 (2013) 7781.   DOI
25 K. Fujii, K. Matsuda, T. Gonoji, K. Watanabe, T. Kawabata, Y. Uetani, and S. Ikeno : Mater. Trans. 52 (2011) 340.   DOI
26 S. Celotto : Acta Mater. 48 (2000) 1775.   DOI
27 K. B. Nie, X. J. Wang, K. Wu, M. Y. Zheng, and X. S. Hu : Mater. Sci. Eng. A 528 (2011) 7484.   DOI
28 J. G. Han and J. H. Jun : J. Kor. Soc. Heat Treat. 32 (2019) 249.
29 J. H. Jun : J. Alloy. Compd. 73 (2017) 237.   DOI
30 J. H. Jun : J. Kor. Soc. Heat Treat. 34 (2021) 287.   DOI
31 M. M. Avdesian and H. Baker : Magnesium and Magnesium Alloys, ASM International, Materials Park, OH, 1999, p. 15.
32 Y. S. Wang, Q. D. Wang, C. J. Ma, W. J. Ding, and Y. P. Zhu : Mater. Sci. Eng. A 342 (2003) 178.   DOI