E. Samuel, G. H. Garza-Elizondo, M. H. Abdelaziz, H. W. Doty, F. H. Samuel
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引用次数: 0
Abstract
The current study is aimed to enhance the tensile performance of Al–Si–Cu–Mg cast alloys at both ambient and elevated temperatures. The investigation is focused on incorporating zirconium (Zr) as a primary alloying element, alongside nickel (Ni) and manganese (Mn), to assess their suitability for automotive engine applications. In Mn-containing alloys, tensile strength improvement was observed due to the precipitation of compacted α-Al15(Fe, Mn)3Si2 and Al6Mn phases. Meanwhile, Ni-bearing phases such as Al3CuNi and Al3Ni in Ni-containing alloys were found to inhibit crack propagation, thereby enhancing tensile properties. Results indicated that the addition of 0.75 wt.% Mn yielded comparable strength values to alloys containing 2–4 wt.% Ni at ambient temperature. Additionally, the presence of 0.25% Zr facilitated the precipitation of fine metastable L12-Al3Zr particles, contributing to improved alloy strength. However, the introduction of 4% Ni resulted in the formation of Al–Cu–Ni particles rather than Al2Cu, leading to a decrease in alloy strength upon aging.
期刊介绍:
The International Journal of Metalcasting is dedicated to leading the transfer of research and technology for the global metalcasting industry. The quarterly publication keeps the latest developments in metalcasting research and technology in front of the scientific leaders in our global industry throughout the year. All papers published in the the journal are approved after a rigorous peer review process. The editorial peer review board represents three international metalcasting groups: academia (metalcasting professors), science and research (personnel from national labs, research and scientific institutions), and industry (leading technical personnel from metalcasting facilities).