Effect of Mn, Ni, and Zr Addition on the Tensile Properties and Precipitation Behavior of Sr-Modified Al–Si–Cu–Mg-Based Alloys

IF 2.6 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING International Journal of Metalcasting Pub Date : 2024-08-05 DOI:10.1007/s40962-024-01414-5
E. Samuel, G. H. Garza-Elizondo, M. H. Abdelaziz, H. W. Doty, F. H. Samuel
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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.

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添加锰、镍和锆对锶改性铝硅铜镁基合金拉伸性能和沉淀行为的影响
目前的研究旨在提高铝-硅-铜-镁铸造合金在常温和高温下的拉伸性能。研究重点是将锆(Zr)与镍(Ni)和锰(Mn)一起作为主要合金元素,以评估它们在汽车发动机应用中的适用性。在含锰合金中,由于α-Al15(Fe, Mn)3Si2 和 Al6Mn 相的紧密析出,拉伸强度得到了提高。同时还发现,含镍合金中的 Al3CuNi 和 Al3Ni 等含镍相可抑制裂纹扩展,从而提高拉伸性能。结果表明,在环境温度下,添加 0.75 重量%的锰可获得与含 2-4 重量%镍的合金相当的强度值。此外,0.25% Zr 的存在促进了 L12-Al3Zr 晶粒的析出,从而提高了合金强度。然而,引入 4% 的 Ni 会形成 Al-Cu-Ni 颗粒,而不是 Al2Cu 颗粒,从而导致合金老化后强度下降。
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来源期刊
International Journal of Metalcasting
International Journal of Metalcasting 工程技术-冶金工程
CiteScore
4.20
自引率
42.30%
发文量
174
审稿时长
>12 weeks
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).
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