Improvement of mechanical properties in micro-alloying Al-Si-Mg-Zn cast alloy

Wang, Dongtao; Zhang, Xiaozu; Xu, Shijie; Nagaumi, Hiromi; Li, Xinzhong

doi:10.1016/j.matlet.2020.128810

Cited by 8 publications

(2 citation statements)

References 9 publications

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“…Also, upon higher cooling rates, La and Ce, just like Mo and Zr, can form fine particles that contribute actively to the alloy's hardening. In work on the effect of the addition of these elements to an Al-Si-Mg-Zn alloy, the addition of Mo and Zr led to increased strength and hardness, and the later addition of La and Ce further improved these properties [147]. The addition of La and Ce to the A356 alloy was also acknowledged to increase the solidification interval, hindering the feeding of the melt [146].…”

Section: Rare Earth (Re) Elementsmentioning

confidence: 99%

The Influence of Alloying Elements on the Microstructure and Properties of Al-Si-Based Casting Alloys: A Review

Callegari

Lima

Coelho

2023

Metals

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The excellent casting behavior and mechanical and corrosion properties of aluminum-silicon (Al-Si)-based alloys make them ideal for the manufacture of lightweight components with complex geometries. However, these properties depend directly on their microstructure, which, in its turn, is strongly affected by the composition of the alloy, among other factors. Several elements can be added to the material aiming to promote microstructural changes, e.g., grain refinement, optimization of phase morphology and distribution, and precipitation strengthening. Efforts are continuously put into such enhancements of cast Al alloys since they lead to quality improvements that allow for weight reduction and safety increase. Considering the technological relevance of the subject, this paper provides an overview of the research focused on the addition of alloying elements to these alloys, with a greater focus on Al-Si-based systems and the comprehension of the effects of these additions on their microstructure and properties.

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Section: Rare Earth (Re) Elementsmentioning

confidence: 99%

The Influence of Alloying Elements on the Microstructure and Properties of Al-Si-Based Casting Alloys: A Review

Callegari

Lima

Coelho

2023

Metals

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“…In particular, Wang et al [ 24 ] reported the formation of nanoscale (La,Ce)-based phases in an Al-Si-Mg-Zn alloy. The rapid solidification in high-pressure die-casting determines the presence of nano-precipitates in the Al matrix in the as-cast condition.…”

Section: Introductionmentioning

confidence: 99%

On the Hardness and Elastic Modulus of Phases in SiC-Reinforced Al Composite: Role of La and Ce Addition

Lattanzi

Jarfors

et al. 2021

Materials

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The use of silicon carbide particles (SiCp) as reinforcement in aluminium (Al)-based composites (Al/SiCp) can offer high hardness and high stiffness. The rare-earth elements like lanthanum (La) and cerium (Ce) and transition metals like nickel (Ni) and copper (Cu) were added into the matrix to form intermetallic phases; this is one way to improve the mechanical property of the composite at elevated temperatures. The α-Al15(Fe,Mn)3Si2, Al20(La,Ce)Ti2, and Al11(La,Ce)3, π-Al8FeMg3Si6 phases are formed. Nanoindentation was employed to measure the hardness and elastic modulus of the phases formed in the composite alloys. The rule of mixture was used to predict the modulus of the matrix alloys. The Halpin–Tsai model was applied to calculate the elastic modulus of the particle-reinforced composites. The transition metals (Ni and Cu) and rare-earth elements (La and Ce) determined a 5–15% increase of the elastic modulus of the matrix alloy. The SiC particles increased the elastic modulus of the matrix alloy by 10–15% in composite materials.

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