Quantifying the effects of Sc and Ag on the microstructure and mechanical properties of Al–Cu alloys

Zhang, Mingshan; Wang, Junsheng; Wang, Qingqing; Xue, Chengpeng; Liu, Xiaoguang

doi:10.1016/j.msea.2021.142355

Cited by 18 publications

(10 citation statements)

References 34 publications

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“…The interaction between dislocations and the second phase can be described by shear and bypass mechanisms. Figure 1 is the relationship between dislocations and precipitated phases [ 17 , 18 , 19 ]. The small and not too hard precipitated phases are sheared when they encounter dislocation movement (the shear mechanism is also called the Friedel mechanism), as shown in Figure 1 a.…”

Section: Strengthening Mechanismmentioning

confidence: 99%

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

et al. 2023

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Al–Si–Cu–Mg cast aluminum alloys have important applications in automobile lightweight due to their advantages such as high strength-to-weight ratio, good heat resistance and excellent casting performance. With the increasing demand for strength and toughness of automotive parts, the development of high strength and toughness Al–Si–Cu–Mg cast aluminum alloys is one of the effective measures to promote the application of cast aluminum alloys in the automotive industry. In this paper, the research progress of improving the strength and toughness of Al–Si–Cu–Mg cast aluminum alloys was described from the aspects of multi-component alloying and heat treatment based on the strengthening mechanism of Al–Si–Cu–Mg cast aluminum alloys. Finally, the development prospects of automotive lightweight Al–Si–Cu–Mg cast aluminum alloys is presented.

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Section: Strengthening Mechanismmentioning

confidence: 99%

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

et al. 2023

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“…where σ Al 0 is the resistance to dislocation glide within the crystallite given by σ Al 0 ~10 MPa [36], σ SS is the solid solution strengthening involved in solute atoms, σ GB is the grain-boundary strengthening, and σ p is the precipitation strengthening caused by precipitates. The solid solution strengthening can be quantitatively calculated as follows [41,42]:…”

Section: Strengthening Mechanismsmentioning

confidence: 99%

Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents

Zhang,

Hao,

et al. 2023

Nanomaterials

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The effect of Mn content on the microstructure evolution and mechanical properties of Al–Cu–Mg–x Mn alloys at ambient temperature was investigated. The findings show that in the Mn-containing alloys at the as-cast state, the blocky primary T(Al20Cu2Mn3) phase coexisting with the Al2Cu phase appeared. With the increase in Mn content, the majority of the Al2Cu phase dissolved, nd a minor amount of the T phase remained at the grain boundary after solution treatment. The rod-like TMn (Al20Cu2Mn3) nanoprecipitate was simultaneously distributed at grain boundaries and the interiors, while a high density of needle-like θ″ (Al3Cu) nanoprecipitate was also observed in the T6 state. Further increases in Mn content promoted the dispersion of the TMn phase and inhibited the growth and transformation of the θ″ phase. Tensile test results show that 0.7 wt.% Mn alloy had excellent mechanical properties at ambient temperature with ultimate tensile strength, yield strength, and fracture elongation of 498.7 MPa, 346.2 MPa, and 19.2%, respectively. The subsequent calculation of strengthening mechanisms elucidates that precipitation strengthening is the main reason for the increase in yield strength of Mn-containing alloys.

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“…Wang et al [16] found that point defects cause lattice distortion for Al 3 Sc and Al 3 Lu, which reduces the elastic properties. In addition, the microalloying of rare earth elements has been recently reported to have an impact on the precipitation structure and, thus, its elastic properties [17][18][19][20][21][22]. Zhang et al [17] proposed that the addition of Sc to Al-Cu alloys promoted the nucleation of Al grains by formation Al 3 Sc, reduced the average size of θ ′ precipitates, and increased the number density of θ ′ precipitates, thereby improving the yield strength and tensile strength of Al alloys.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the microalloying of rare earth elements has been recently reported to have an impact on the precipitation structure and, thus, its elastic properties [17][18][19][20][21][22]. Zhang et al [17] proposed that the addition of Sc to Al-Cu alloys promoted the nucleation of Al grains by formation Al 3 Sc, reduced the average size of θ ′ precipitates, and increased the number density of θ ′ precipitates, thereby improving the yield strength and tensile strength of Al alloys. Ying et al [8] and Wang et al [9] also suggested that the addition of Sc improved the grain refinement and thus improved the mechanical properties of the Al alloy.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Point Defects on Young’s Modulus of the Off-Stoichiometric Al3X (X = Li, Sc, and Zr) Phases: A First-Principles Study

Meng,

Wang,

et al. 2023

Metals

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L12-Al3X (X = Li, Sc, and Zr) precipitates are the main strengthened phases of high-strength aluminum alloys and are critical for aerospace structural materials. Point defects and substitutional ternary elements change the mechanical properties of Al3X. In this paper, the effect of point defects, including vacancy, antisite, and substitutional element addition defects on the elastic modulus of the off-stoichiometric Al3X (X = Li, Sc, and Zr) phase were investigated by using first-principle calculations. The formation enthalpies of the defective Al3X alloy and isolated point defects in Al3X were calculated, and the results showed that the defects have an effect on the structure and elasticity of the off-stoichiometric Al3X phases. The lattice distortion, elastic constants, and elastic moduli were further investigated. It was found that the point defects increased the Young’s modulus for Al3Zr, and the doping of Er improved the Young’s modulus for off-stoichiometric Al3Li and Al3Sc. Adjusting the position of vacancies can improve the elastic modulus. In addition, the doping of substitutional elements (especially Sc, Ti, Zr, Hf, Ta, Mn, Ir, and Cf) can greatly increase the Young’s modulus of off-stoichiometric Al3Li.

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Quantifying the effects of Sc and Ag on the microstructure and mechanical properties of Al–Cu alloys

Cited by 18 publications

References 34 publications

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents

The Effect of Point Defects on Young’s Modulus of the Off-Stoichiometric Al3X (X = Li, Sc, and Zr) Phases: A First-Principles Study

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