Magnesium alloys have many excellent properties and possess wide industrial application prospects. Sheets of AZ91D magnesium alloy with different thicknesses were produced by the die-cast process, and the cooling rates lay between 3.77 and 29.27 °C s−1 with the thickness ranging from 1.5 to 6 mm. With the increasing thickness, the grain size increased, and the concentration of Al solute atoms in Mg matrix decreased. The second phases transformed from homogeneous fine particles and short strips at 1.5 mm to a network at 6 mm. These changes can be attributed to the cooling rate. The thermal conductivity was found to increase with the increasing thickness at the same temperature, and to increase with the increasing temperature at the same thickness. The minimum thermal conductivity (45.19 W (m K)−1), and the maximum thermal conductivity (89.32 W (m K)−1) were obtained at a thickness of 1.5 mm at 25 °C and a thickness of 6 mm at 150 °C, respectively. The grain size increased, and the Al solute atoms in Mg matrix decreased with the increasing thickness, which reduced the lattice irregularity and scattering of electrons and phonons, and resulted in an increase in the thermal conductivity.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
M.M. Avedesian and H. Baker: ASM Specialty Handbook: Magnesium and Magnesium alloys. ASM international. Materials Park, 1999.
X. Tong, G. Q. You, Y. H. Ding, H. S. Xue, Y. C. Wang, and W. Guo: Mater. Lett., 2018, vol. 229, 261-264.
L. P. Zhong, J. Peng, S. Sun, Y. J. Wang, Y. Lu, and F. S. Pan: J. Mater. Sci. Technol., 2017, vol. 33, pp. 1240–1248.
M. K. Kulekci: Magnesium and its alloys applications in automotive industry. Int. J. Adv. Manuf. Technol., 2008, vol. 39, pp. 851-865.
C. Y. Su, D. J. Li, A. A. Luo, R. H. Shi, and X. Q. Zeng: Metall. Mater. Trans. A.,2019, vol.50, pp 1970–1984.
T. Ying, M.Y. Zheng, Z.T. Li, X.G. Qiao, and S.W. Xu: J. Alloys Compd., 2015, vol. 621, pp. 250-255.
C. Y. Su, D. J. Li, T. Ying, L. P. Zhou, L. Li, and X. Q. Zeng: J. Alloys Compd., 2016, vol. 685, pp. 114-121.
J. Peng, L. P. Zhong, Y. J. Wang, Y. Lu, and F. S. Pan: Mater. Des., 2015, vol. 87, pp. 914-919.
K.C. Mills: Recommended values of thermophysical properties for selected commercial alloys. Woodhead Publishing, Cambridge, 2002, p. 143.
Y. S. Touloukian, R. W. Powell, C.Y. Ho, and P. G. Klemens: Thermophysical properties of matter: Thermal conductivity; metallic elements and alloys. Plenum, New York, 1970, pp. 658–660.
G. Q. You, Y. Ming, P. Yan, X. L. Ma, and B. H. Tong: Rare Metal Mat. Eng., 2018, vol. 47, pp. 2393-2403.
Z. Q. Cui and Y. C. Tan: Metallurgy and Heat Treatment, 2nd ed. Harbin: Harbin Institute of Technology Press, 2012, pp. 39.
R. Berman: Thermal Conduction in Solids. Oxford: Clarendon Press, 1976.
J. W. Yuan, K. Zhang, X. H. Zhang, X. G. Li, T. Li, Y. J. Li, M. L. Ma, and G. L. Shi: J. Alloys Compd., 2013, vol. 47, pp. 32-36.
T. Ying, H. Chi, M. Y. Zheng, Z. T. Li, and C. Uher: Acta Mater. 2014, vol. 80, pp. 288-295.
U.F. Kocks: Metall. Trans. A, 1985, vol. 16, PP. 2109–2129.
A. R. Eivani, H. Ahmed, J. Zhou, and J. Duszczyk: Metall. Mater. Trans. A., 2009, vol. 40, pp. 2435-2446.
C. Y. Su, D. J. Li, A. A. Luo, T. Ying, and X. Q. Zeng: J. Alloys Compd., 2018, vol. 747, pp. 431-437.
P. Sharifi, Y. Fan, H. B. Anaraki, A. Banerjee, K. Sadayappan, and J. T. Wood: Metall. Mater. Trans. A.. 2016, vol. 47, pp 5159–5168.
This research is supported by the key project of the National Key Research and Development Program of China (No. 2016YFB0301100) and the Entrepreneurship & Innovation Program for Chongqing Overseas Returned Scholars (No. CX2017075).
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Manuscript submitted April 15, 2019.
About this article
Cite this article
Ming, Y., You, G., Xu, X. et al. Effect of Thickness on the Thermal Conductivity and Microstructure of Die-Cast AZ91D Magnesium Alloy. Metall Mater Trans A 50, 5969–5976 (2019). https://doi.org/10.1007/s11661-019-05473-w