Towards strength-ductility synergy through an optimized two-stage solution treatment in Al–7Si–3Cu-0.5Mg alloys

Yang, Xufeng; Xu, Cong; Guang-xi, LU; Guan, Shaokang

doi:10.1016/j.msea.2022.143504

Cited by 9 publications

(2 citation statements)

References 47 publications

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“…The fragmentation and coarsening of eutectic Si occur simultaneously, which together determine the aspect ratio of eutectic Si. Increasing the solid solution temperature accelerates the coarsening of eutectic Si, leading to an increase in the aspect ratio of eutectic Si [ 31 ]. At lower solid solution temperatures, both spheroidization of eutectic Si and passivation of primary Si require a longer SHT time to achieve excellent solution results.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Mechanical Properties of Cast Al-Si-Cu-Mg-Ni-Cr Alloys: Effects of Time and Temperature on Two-Stage Solution Treatment and Ageing

Qin

Liu

et al. 2023

Materials

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Ameliorating the high-temperature performance of cast Al-Si alloys used as engine components is essential. The effects of different T6 heat-treatment processes on the microstructure and mechanical properties of cast Al-Si-Cu-Mg-Ni-Cr alloys were investigated in the present study. The results demonstrate that, under the optimal solution treatment conditions of 500 °C for 2 h and 540 °C for 4 h, the T-Al9FeNi phase was present in the alloy, and the roundness of primary Si and the aspect ratio of eutectic Si in the alloy reached valley values of 1.46 and 2.56, respectively. With increasing ageing time at 180 °C, the tensile strength significantly improved, while the microhardness first increased and then decreased. When the ageing time was 4 h, microhardness reached a peak value of 155.82 HV. The fracture characteristics changed from quasi-cleavage to the coexistence of quasi-cleavage and dimples. After heat treatment, the high-temperature tensile properties of the alloy improved, which is a significant advantage compared to the as-cast alloy. The stable Al3Ni and Al9FeNi phases inhibited the cracking of the alloy at 350 °C.

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Section: Resultsmentioning

confidence: 99%

Microstructure and Mechanical Properties of Cast Al-Si-Cu-Mg-Ni-Cr Alloys: Effects of Time and Temperature on Two-Stage Solution Treatment and Ageing

Qin

Liu

et al. 2023

Materials

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“…Wang et al [ 13 ] obtained a mixture of β″-Mg 5 Si 6 , θ’-Al 2 Cu and Q’-Al 5 Cu 2 Mg 8 Si 6 nanoprecipitated phases by adjusting artificial aging parameters, resulting in excellent mechanical properties of Al–Si–Cu–Mg alloy. Fang et al [ 14 ] optimized the two-stage solution treatments of Al–Si–Cu–Mg alloy to obtain a high and uniform solute concentration without overburning of the Cu-containing phase, thus improving the solution strengthening. However, although the research on multi-component alloying and heat treatment of Al–Si–Cu–Mg cast alloy has been extensively studied, there is still little comprehensive and exhaustive research on it based on the strengthening mechanism of casting alloy, which is not conducive to the development and application of high strength and toughness Al–Si–Cu–Mg cast aluminum alloys.…”

Section: Introductionmentioning

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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The novel heat treatments of aluminium alloy characterized by multistage and non-isothermal routes: A review

Feng,

Li,

Zhang

et al. 2023

J. Cent. South Univ.

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Towards strength-ductility synergy through an optimized two-stage solution treatment in Al–7Si–3Cu-0.5Mg alloys

Cited by 9 publications

References 47 publications

Microstructure and Mechanical Properties of Cast Al-Si-Cu-Mg-Ni-Cr Alloys: Effects of Time and Temperature on Two-Stage Solution Treatment and Ageing

Microstructure and Mechanical Properties of Cast Al-Si-Cu-Mg-Ni-Cr Alloys: Effects of Time and Temperature on Two-Stage Solution Treatment and Ageing

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

The novel heat treatments of aluminium alloy characterized by multistage and non-isothermal routes: A review

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