Zhang, H.; Wu, M.; Li, Z.; Xiao, D.; Huang, Y.; Huang, L.; Liu, W. Effect of Combined Addition of CeLa and GdY on Microstructure and Mechanical Properties of As-Cast Al-Cu-Mn Alloys. Materials2023, 16, 7332.
Zhang, H.; Wu, M.; Li, Z.; Xiao, D.; Huang, Y.; Huang, L.; Liu, W. Effect of Combined Addition of CeLa and GdY on Microstructure and Mechanical Properties of As-Cast Al-Cu-Mn Alloys. Materials 2023, 16, 7332.
Zhang, H.; Wu, M.; Li, Z.; Xiao, D.; Huang, Y.; Huang, L.; Liu, W. Effect of Combined Addition of CeLa and GdY on Microstructure and Mechanical Properties of As-Cast Al-Cu-Mn Alloys. Materials2023, 16, 7332.
Zhang, H.; Wu, M.; Li, Z.; Xiao, D.; Huang, Y.; Huang, L.; Liu, W. Effect of Combined Addition of CeLa and GdY on Microstructure and Mechanical Properties of As-Cast Al-Cu-Mn Alloys. Materials 2023, 16, 7332.
Abstract
In this study, the effects of combined addition of CeLa and GdY on microstructure and mechanical properties of as-cast Al-4Cu-1Mn alloys were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopies (TEM) and tensile testing. The results show that the minor addition of CeLa and GdY leads to the refinement of grain size. The addition of CeLa results in the formation of supersaturated vacancies in the Al matrix, whereas the addition of GdY leads to a decrease in the precipitation temperature of the Al2Cu phase. The combined CeLa and GdY addition can significantly increase ultimate tensile strength (UTS) while losing only a small amount of elongation (EL). Compared with the unmodified alloy, the grain size and SDAS of the alloy (0.2 wt% CeLa + 0.1 wt% GdY) were diminished by 67.2% and 58.7%, respectively, while maximum hardness and UTS rose by 31.2% and 36.9%, correspondingly.
Chemistry and Materials Science, Metals, Alloys and Metallurgy
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