New developments of high-zinc Al-Zn-Cu-Mn cast alloys

Krajewski, W.; Greer, A.L.; Buraś, J.; Piwowarski, G.; Krajewski, Paweł

doi:10.1016/j.matpr.2018.10.410

Cited by 16 publications

(10 citation statements)

References 10 publications

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“…Previous studies confirmed that the modification of main alloying elements and their contents had complex and/or even contradictory effects on the hot tear tendency of AleZneMgeCu alloys [11,23,24]. Krajewski [25] and S. Shin et al [26] pointed that extra high Zn level (>20 wt%) could effectively suppress the formation of hot tear during solidification, however, the high density induced by high Zn is not favoured for light-weight requirement. On the other side, grain refinement using AleTi or AleTieB master alloys has been extensively studied to reduce hot tear and simultaneously increase the strength and elongation of cast aluminium alloys [27e29].J.…”

Section: Introductionmentioning

confidence: 94%

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Liu

Zhu

2020

Journal of Alloys and Compounds

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The effects of Ni on the phases, microstructural evolution, hot tear susceptibility and mechanical properties of Ale6Zn-1.4Mg-1.2Cu alloys fabricated by gravity casting were investigated using X-ray diffraction (XRD), scanning electronic microscopy (SEM), optical microscopy, the N-Tec Hot tear and tensile test. The calculation of phase diagrams (CALPHAD) modelling was also conducted to understand the phase formation of the experimental alloys. The results showed that the secondary phases (including h-MgZn2,SeAl2CuMg and Al3Ni) are mainly distributed at grain boundary, while round SeAl2CuMg particles are also found in a-Al matrix. Ni only exists as Al3Ni with different morphologies and its number density ascends with the increase of Ni content in alloys, which also significantly improves the hot tear resistance. As a result, the increased Ni in the alloys remarkably improves the ultimate tensile and yield strength, while the elongation increases when Ni < 0.6 wt% followed by decreases when Ni > 0.6 wt%.

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Section: Introductionmentioning

confidence: 94%

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Liu

Zhu

2020

Journal of Alloys and Compounds

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“…The use of alloying elements of transition metals such as Zr is appropriate in combination with other elements such as Ti, Sr, Mn. These elements are standard in pre-inoculated and premodified aluminium alloys [3][4][5][6][7][8][9]. selected mechanical properties.…”

Section: Fig 1 Production Of Evs By Car Manufacturers For Thementioning

confidence: 99%

Archives of Foundry Engineering

Kuriš,

Bolibruchova,

Matejka

et al. 2020

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The article focused primarily on comparing the achieved mechanical results for AlSi7Mg0.3Cu0.5Zr and AlSi7Mg0.3Cu0.5Zr0.15Ti experimental alloys. Experimental variants with the addition of Zr ≥ 0.05 wt. % demonstrated the ability of Zr to precipitate in the form of Al 3 Zr or AlSiZr intermetallic phases. Zr precipitated in the form of long smooth needles with split ends. When evaluating the thermal analyses, the repeated peak was observed already with the initial addition of Zr in the range of approximately 630 °C. It was interesting to observe the increased interaction with other intermetallic phases. EDX analysis confirmed that the individual phases are based on Cu, Mg but also Fe. Similar phenomena were observed in experimental alloys with a constant addition of Zr and a gradual increase in Ti by 0.1 wt. %. A significant change occurred in the amount of precipitated Zr phases. A more significant increase in mechanical properties after heat treatment of AlSi7Mg0.3Cu0.5Zr experimental alloys was observed mainly above the Zr content ≥ 0.15 wt. % Zr. The improvement of yield and tensile strength over the AlSi7Mg0.3Cu0.5 reference alloy after heat treatment was minimal, not exceeding 1 %. A more significant improvement after heat treatment occurred in modulus of elongation with an increase by 6 %, and in hardness with an increase by 7 %. The most significant drop occurred in ductility where a decrease by 31 % was observed compared to the reference alloy. AlSi7Mg0.3Cu0.5Zr0.15Ti experimental alloys, characterized by varying Ti content, achieved a more significant improvement. The improvement in tensile strength over the AlSi7Mg0.3Cu0.5 reference alloy after heat treatment was minimal, not exceeding 1 %. A more significant improvement after heat treatment occurred in modulus of elongation with an increase by 12 %, in hardness with an increase by 12 % and the most significant improvement occurred in yield strength with a value of 18 %. The most significant decrease also occurred in ductility where, compared to the reference alloy, the ductility drop was by up to 67 %.

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“…Zinc-based aluminum rich alloy is a new non-ferrous metal material that has been widely used at home and abroad in recent decades [1,2]. Due to its low melting point, low density and excellent mechanical properties [3,4], it is widely used in coal, petroleum, aerospace and other fields [5,6].…”

Section: Introductionmentioning

confidence: 99%

Research on Preparation and Properties of Carbon Fiber Reinforced Zinc-Based Aluminum Rich Alloy Composite

Zhong

et al. 2022

Materials

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Aiming at the problems of poor bonding between the carbon fiber and the metal matrix and the friction and wear performance of the composite material during the preparation of carbon fiber reinforced zinc-based aluminum rich alloy composites, the carbon fiber surface metallization process was studied. Taking ZA27 as the research object, a new type of zinc-based aluminum rich alloy composite material was prepared by using surface metallized chopped carbon fibers with different contents as reinforcement materials. The microscopic morphology, element distribution and phase composition of the surface metallized carbon fiber and composite materials were characterized, and the hardness and friction and wear properties of the composite materials were tested. The results show that: the surface metallization of carbon fiber effectively reduces the diffusion of carbon elements into the matrix material during the sintering process, and improves the interface bonding between the carbon fiber and the matrix material; Compared with ZA27 alloy, the hardness of 6vt% carbon fiber is increased by 29.6%, and the average friction coefficient and wear rate are reduced by about 18.4% and 96%, respectively, indicating that the carbon fiber reinforced zinc-based aluminum rich alloy composite material optimizes the friction and wear performance of traditional materials.

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New developments of high-zinc Al-Zn-Cu-Mn cast alloys

Cited by 16 publications

References 10 publications

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Archives of Foundry Engineering

Research on Preparation and Properties of Carbon Fiber Reinforced Zinc-Based Aluminum Rich Alloy Composite

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