Effect of Al3Zr Dispersoid on Microstructure and Mechanical Properties of Al-Cu-Li Alloy During Composite Spinning-Extrusion Forming

Zhang, Jin; Zeng, Huaqiang; Wang, Cheng; Tang, Zibo

doi:10.3389/fmats.2022.822589

Cited by 3 publications

(1 citation statement)

References 25 publications

(27 reference statements)

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“…In general, the addition of Zr to the alloy increases its strength properties and hardness. Even a small amount of Zr increases the hardness of the finished product due to the formation of the Al 3 Zr phase, which increases not only the hardness, but also the wear resistance of the material [28].…”

Section: Introductionmentioning

confidence: 99%

Zr as an Alternative Grain Refiner in the Novel AlSi5Cu2Mg Alloy

Bolibruchová,

Matejka,

Širanec

et al. 2024

Metals

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Al-Si-Cu-Mg alloys are among the most significant types of aluminum alloys, accounting for 85–90% of all castings used in the automotive sector. These alloys are used, for example, in the manufacturing of engine blocks and cylinder heads due to their excellent specific strength (ratio of strength to specific weight) and superior castability and thermal conductivity. This study investigated the effect of using Zr as an alternative grain refiner in the novel AlSi5Cu2Mg cylinder head alloy. The microstructure of this alloy could not be refined via common Al-Ti-B grain refiners due to its specifically designed chemical composition, which limits the maximum Ti content to 0.03 wt.%. The results showed that the addition of Zr via the AlZr20 master alloy led to a gradual increase in the solidus temperature and to the grain refinement of the microstructure with the addition of as little as 0.05 wt.% Zr. The addition of more Zr (0.10, 0.15, and 0.20 wt.%) led to a gradual grain refinement effect for the alloy. The presence of Zr in the AlSi5Cu2Mg alloy was reflected in the formation of Zr-rich intermetallic phases with acicular morphology. Such phases acted as potent nucleants for the α-Al grain.

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Section: Introductionmentioning

confidence: 99%

Zr as an Alternative Grain Refiner in the Novel AlSi5Cu2Mg Alloy

Bolibruchová,

Matejka,

Širanec

et al. 2024

Metals

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show abstract

Simultaneously Enhancing the Strength and Ductility of Spin-Extruded 2195 Al–Li Alloy by Grain Configuration Tunning

et al. 2022

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The Effect of Thermomechanical Processing Sequence on the Dispersoid Distribution and Final Mechanical Properties of Spray-Formed Al-Cu-Li Alloy

Ning

Zhang

Ding

et al. 2022

Metals

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Controlling the formation of the β’ (Al3Zr) phase is pivotal for regulating the recrystallization and thus the mechanical properties of the spray formed 2195 (Al–Cu–Li) alloy. In a conventional “homogenization-extrusion” process, the precipitation of β’ is severely affected by the presence of the T1(Al2CuLi) phase in the as-deposited alloy, leading to an inhomogeneous distribution of the β′ phase. In the present work, we propose a new thermomechanical processing (TMP)—swapping the order of the homogenization and extrusion processes. The microstructures and properties of the new proposed TMP were systematically studied at various stages of the alloy treatment and compared with the out of the conventional TMP. It was revealed that the introduction of the extrusion process on the as-deposited alloy can break the continuous network of primary phases and dissolve the T1 phase, promoting a uniform distribution of the β’ phase during subsequent two-step homogenization. During solution treatment, the new TMP is more effectively in suppressing the formation of a coarse grain layer at sheet surface, while after final peak aging, the new TMP produces a lower alloy strength but a higher elongation, due mainly to the smaller thickness reduction during deformation. The new proposed TMP technique provides a new insight into regulating the mechanical properties of Al-Cu-Li alloys.

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Effect of Al3Zr Dispersoid on Microstructure and Mechanical Properties of Al-Cu-Li Alloy During Composite Spinning-Extrusion Forming

Cited by 3 publications

References 25 publications

Zr as an Alternative Grain Refiner in the Novel AlSi5Cu2Mg Alloy

Zr as an Alternative Grain Refiner in the Novel AlSi5Cu2Mg Alloy

Simultaneously Enhancing the Strength and Ductility of Spin-Extruded 2195 Al–Li Alloy by Grain Configuration Tunning

The Effect of Thermomechanical Processing Sequence on the Dispersoid Distribution and Final Mechanical Properties of Spray-Formed Al-Cu-Li Alloy

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