Effect of modifying additives of dysprosium titanate on the structure of silumin AK12

IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING
Guzel Kh. Sharipzyanova, Janna V. Eremeeva, Ramzan A. -V. Turluyev, Elena A. Guseva, Yulia I. Karlina
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Abstract

Currently, silumins, which are aluminum alloys, are most widely used in mechanical engineering, construction, and other industries. The use of silumins is often limited due to the presence of large-crystalline structures, such as α-Al dendrites, needle-shaped crystals of eutectic Si, and intermetallic phases. The effect of various additives on and their relationship with the microstructure and mechanical properties of Fe-containing intermetallic phases (Al–Si–Fe and Al–Si–Fe–Mn) has been studied extensively. However, studies of the effect of various additives on the morphology of Fe-containing phases in industrial Al–Si alloys remain relevant.

The effect of small amounts of dysprosium titanate additives (0.01, 0.05, 0.1, 0.5 wt.%) on the morphology and localization of Fe-containing intermetallic phases is studied. Introducing 0.01 wt.% dysprosium titanate causes the transformation of the needle-shaped β-phase to the α-phase in the form of more compact blocks and polyhedral crystals, the size of the α-phase reducing by more than half. The introduction of 0.05, 0.1, and 0.5 wt.% dysprosium titanate does not change the modification of the α- and β-phases and reduces the size of the phases by a factor of 1.5 on average. After the introduction of dysprosium titanate, θ‑Al2Cu particles are dissolved and Cu is concentrated/localized in the Fe-containing intermetallic phases in all the modified alloys.

After the introduction of 0.05–0.5 wt.% dysprosium titanate, the tensile strength of AK12 alloys increases due to a decrease in the size of the α- and β-phases. The modification of the Fe-containing intermetallic phases from the β-phase to the α-phase after the introduction of 0.1 wt.% dysprosium titanate decreases the tensile strength and elongation. The optimum is the addition of tungsten in the amount of 0.1 wt.%, as it leads to the optimal ratio between the structure and the mechanical properties. The tensile strength and elongation increase by 23% on average.

Abstract Image

Abstract Image

钛酸镝改性添加剂对硅铝 AK12 结构的影响
目前,硅铝合金最广泛地应用于机械工程、建筑和其他行业。由于硅铝合金中存在大晶体结构,如α-Al树枝状晶体、共晶 Si 的针状晶体和金属间相,硅铝合金的使用往往受到限制。各种添加剂对含铁金属间相(Al-Si-Fe 和 Al-Si-Fe-Mn)的微观结构和机械性能的影响及其关系已得到广泛研究。本文研究了少量钛酸镝添加剂(0.01、0.05、0.1、0.5 wt.%)对含铁金属间相形态和定位的影响。引入 0.01 wt.%的钛酸镝会使针状β相转变为α相,形成更紧密的块状和多面体晶体,α相的尺寸减小一半以上。引入 0.05、0.1 和 0.5 重量百分比的钛酸镝不会改变 α 相和 β 相的变化,相的尺寸平均缩小了 1.5 倍。引入钛酸镝后,θ-Al2Cu 颗粒被溶解,在所有改性合金中,Cu 被集中/定位在含铁金属间相中。引入 0.05-0.5 wt.%的钛酸镝后,由于α相和β相的尺寸减小,AK12 合金的抗拉强度增加。引入 0.1 重量%的钛酸镝后,含铁金属间相从β相转变为α相,从而降低了抗拉强度和伸长率。最佳添加量为 0.1 wt.%的钨可使结构和机械性能达到最佳比例。拉伸强度和伸长率平均提高了 23%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Metallurgist
Metallurgist 工程技术-冶金工程
CiteScore
1.50
自引率
44.40%
发文量
151
审稿时长
4-8 weeks
期刊介绍: Metallurgist is the leading Russian journal in metallurgy. Publication started in 1956. Basic topics covered include: State of the art and development of enterprises in ferrous and nonferrous metallurgy and mining; Metallurgy of ferrous, nonferrous, rare, and precious metals; Metallurgical equipment; Automation and control; Protection of labor; Protection of the environment; Resources and energy saving; Quality and certification; History of metallurgy; Inventions (patents).
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