Effect of Zr addition on the microstructure evolution and mechanical properties of extruded Al-Cu-Li-Mn alloys

Deng, Shaozhi; Li, Jinfeng; Hong, Nian; Lu, Ding-ding; Zeng, Guang-jun; Liu, Zhenzhen; Xiang, Hui; Ji-rong, Que; Liu, Danyang

doi:10.1016/j.matchar.2023.113011

Cited by 18 publications

(1 citation statement)

References 57 publications

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“…Traditional aluminum alloys can no longer meet the increased demands of modern products operating in harsh conditions. Important alloying elements for heat-resistant aluminum alloys are transition metals, such as zirconium [1][2][3][4]. However, their limiting solubility in aluminum is extremely low, which reduces the strengthening potential of the alloys.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Influence of Zr on the Strengthening of the Al-10% Al2O3 Composite Obtained by Mechanical Alloying

Prosviryakov,

Bazlov,

Churyumov

et al. 2023

Metals

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Al2O3 is a traditional strengthening phase in aluminum matrix composites due to its high hardness and melting point. At the same time, zirconium is an important alloying element for heat-resistant aluminum alloys. However, its effect on the structure and properties of Al-Al2O3 composites remains unexplored at present. In this work, the effect of the addition of Zr (5 wt%) on the microstructure and strengthening of the Al-10 vol% Al2O3 composite was investigated for the first time. Composite materials with and without Zr addition were obtained through mechanical alloying as a result of ball milling for 20 h followed by multi-directional forging (MDF) at a temperature of 400 °C. OM, SEM and XRD were used to study the microstructure and its parameters. The work showed that the use of mechanical alloying and MDF contributes to the formation of dense composite samples with a nanocrystalline microstructure and a uniform distribution of alumina particles. The addition of Zr contributes to a 1.4-fold increase in the microhardness and yield strength of a compact sample at room temperature due to the formation of Al3Zr (L12) dispersoids. It was been shown that the largest contribution to the strength of both materials comes from grain boundary strengthening, which is at least 50% of the yield strength. The resulting composites exhibit high heat resistance. For example, their compressive yield strength at 350 °C is approximately 220 MPa.

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Section: Introductionmentioning

confidence: 99%

A Study on the Influence of Zr on the Strengthening of the Al-10% Al2O3 Composite Obtained by Mechanical Alloying

Prosviryakov,

Bazlov,

Churyumov

et al. 2023

Metals

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Effect of Aging Treatment on Precipitation Strengthening Phase and Mechanical Properties of Al–Cu–Li Alloy

Zhang,

Zhong,

Qian

et al. 2023

Adv Eng Mater

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The microstructure and mechanical properties of Al‐Cu‐Li alloy with different aging processes have been investigated. The experimental results indicate that increasing aging temperature enhances the precipitation kinetics of the alloy, which is beneficial for T1 phase precipitation. The average size of δ′ phase is decreased from 18.2 nm to 11.6 nm when aging process changes from 200°C single‐stage aging to 150°C/200°C two‐stage aging. The two‐stage aging can effectively suppress the coarsening of δ′ phase because T1 phase competes with δ' phase for Li atoms. The past researches have pointed out that T1 phase thickens when aging temperature exceeds 190°C. However, the results indicate that two‐stage aging can not only retard thickening but also increase number density of T1 phase. The alloy reaches maximum strength in two‐stage aging, and the ultimate tensile strength (UTS), yield strength (YS) and elongation (EL) is 415 MPa, 376 MPa, 5.9%, respectively. When the diameter of T1 phase reaches a critical value, the strengthening mechanism of T1 phase has changed from shear mechanism to bypass mechanism. The diameter distribution range of T1 phase is large in this paper, and the strengthening mechanism of T1 phase is a mixed strengthening mechanism of shear mechanism and bypass mechanism.This article is protected by copyright. All rights reserved.

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Effect of Cu/Li Ratio on Porosity and Microstructural Evolution of Gravity and Squeeze-Cast Al–Cu–Li Alloys

Manojkumar,

Agarwal,

Roy

et al. 2024

Metall Mater Trans B

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Effect of Zr addition on the microstructure evolution and mechanical properties of extruded Al-Cu-Li-Mn alloys

Cited by 18 publications

References 57 publications

A Study on the Influence of Zr on the Strengthening of the Al-10% Al2O3 Composite Obtained by Mechanical Alloying

A Study on the Influence of Zr on the Strengthening of the Al-10% Al2O3 Composite Obtained by Mechanical Alloying

Effect of Aging Treatment on Precipitation Strengthening Phase and Mechanical Properties of Al–Cu–Li Alloy

Effect of Cu/Li Ratio on Porosity and Microstructural Evolution of Gravity and Squeeze-Cast Al–Cu–Li Alloys

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