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Title: | A new die-cast magnesium alloy for applications at higher elevated temperatures of 200–300 °C |
Authors: | Dong, X Feng, L Wang, S Nyberg, EA Ji, S |
Keywords: | magnesium alloys;high pressure die casting;elevated temperatures;microstructure;mechanical properties |
Issue Date: | 3-Nov-2020 |
Publisher: | Elsevier |
Citation: | Dong, X. et al. (2021) 'A new die-cast magnesium alloy for applications at higher elevated temperatures of 200–300 °C', Journal of Magnesium and Alloys, 9 (1), pp. 90 - 101. doi: 10.1016/j.jma.2020.09.012. |
Abstract: | The development of lightweight magnesium (Mg) alloys capable of operating at elevated temperatures of 200–300 °C and the ability of using high pressure die casting for high-volume manufacturing are the most advanced developments in manufacturing critical parts for internal combustion engines used in power tools. Here we report the microstructure and mechanical properties of a newly developed die-cast Mg–RE(La,Ce,Nd,Gd)–Al alloy capable of working at higher elevated temperatures of 200–300 °C. The new alloy delivers the yield strength of 94 MPa at 300 °C, which demonstrates a 42% increase over the benchmark AE44 high temperature die-cast Mg alloy. The new alloy also has good stiffness at elevated temperatures with its modulus only decreasing linearly by 13% from room temperature up to 300 °C. Thermal analysis shows a minor peak at 364.7 °C in the specific heat curve of the new alloy, indicating a good phase stability of the alloy up to 300 °C. Nd and Gd have more affinity to Al for the formation of the minority of divorced Al–RE(Nd,Gd) based compounds, and the stable Al-poor Mg12RE(La0.22Ce0.13Nd0.31Gd0.31)Zn0.39Al0.13 compound acts as the continuous inter-dendritic network, which contribute to the high mechanical performance and stability of the new die-cast Mg alloy at 200–300 °C. |
URI: | https://bura.brunel.ac.uk/handle/2438/21894 |
DOI: | https://doi.org/10.1016/j.jma.2020.09.012 |
Other Identifiers: | ORCiD records: Xixi Dong https://orcid.org/0000-0002-3128-1760; Shihao Wang https://orcid.org/0000-0003-2645-2075; Shouxun Ji https://orcid.org/0000-0002-8103-8638. |
Appears in Collections: | Brunel Centre for Advanced Solidification Technology (BCAST) |
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FullText.pdf | Copyright © 2020 Published by Elsevier B.V. on behalf of Chongqing University. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/ ) | 3.78 MB | Adobe PDF | View/Open |
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