The strengthening role of micro-sized phases and nano-precipitates in Al–Mg2Si–Cu(–Ni) alloys at 25 °C and 350 °C

Sun, Yue; Li, Chong; Zhou, Zeyu; An, Rujie; Yu, Liming; Liu, Yongchang

doi:10.1016/j.jmrt.2023.03.176

Journal of Materials Research and Technology

2023

DOI: 10.1016/j.jmrt.2023.03.176

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The strengthening role of micro-sized phases and nano-precipitates in Al–Mg2Si–Cu(–Ni) alloys at 25 °C and 350 °C

Yue Sun¹,

Chong Li²,

Zeyu Zhou³

et al.

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Cited by 7 publications

(1 citation statement)

References 33 publications

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“…[9][10][11] Ni element has a great role in enhancing the high-temperature performance of aluminum alloys. [12] Ni eutectic can reduce thermal tearing during casting, [13] and the Al-Ni eutectic is extremely thermally stable. [14][15][16] According to Feng et al [17] an increase in Ni content resulted in a 22 MPa increase in tensile strength at 350 °C.…”

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Directed Energy Deposition‐Arc Repair Al6.5Cu2Ni0.3Ti0.5Zr0.25V Alloy: Microstructure Evolution and Strengthening Mechanism

Dai,

Song,

Chen

et al. 2024

Adv Eng Mater

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Casting Al6.5Cu2Ni0.3Ti0.5Zr0.25V alloy is applied to aircraft engine components, but the casting defects are difficult to avoid. In this research, the local defects of casting heat‐resistant Al6.5Cu2Ni0.3Ti0.5Zr0.25V alloy parts are repaired by the arc‐directed energy deposition method. To examine the mechanism of the microstructure in the repaired zone of the heat treatment condition on the high‐temperature characteristics, the microstructure evolution of the repaired zone before and after heat treatment is analyzed. The results indicate that stratification exists in the sedimentary layer, however, the overall grain distribution is relatively uniform. After heat treatment, the microstructure of the repaired zone is changed, Cu element distribution becomes uniform and dendrite segregation disappears; simultaneously, the grain in the repaired zone mainly exists as high angle grain boundaries, which improves the fracture resistance ability of the material. At 350 °C, the average tensile strength, yield strength and elongation are 120.0 MPa, 98.6 MPa and 12.9%, respectively, the tensile strength reaches 94.1% of the matrix. Dimples abound on the fracture's exterior, and the fracture form of the repaired zone is microporous aggregate fracture. δ‐Al3CuNi and γ‐Al7Cu4Ni enhance the grain boundary strength, and θ′‐Al2Cu diffuses from the α‐Al matrix during aging, which is the main reason for the excellent high‐temperature performance of the repaired zone.

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mentioning

confidence: 99%

Directed Energy Deposition‐Arc Repair Al6.5Cu2Ni0.3Ti0.5Zr0.25V Alloy: Microstructure Evolution and Strengthening Mechanism

Dai,

Song,

Chen

et al. 2024

Adv Eng Mater

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Study on the microstructure and mechanical properties of ZK60 magnesium alloy with submicron twins and precipitates obtained by room temperature multi-directional forging

Wei,

Yuan,

Shan

et al. 2023

J Mater Sci

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Research on microstructure and mechanical properties at elevated temperature of Al-Mg-Si-Sc-Zr alloy strengthened by Al3(Sc, Zr) nanoprecipitates

Yu,

Zhu,

et al. 2024

Journal of Alloys and Compounds

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The strengthening role of micro-sized phases and nano-precipitates in Al–Mg2Si–Cu(–Ni) alloys at 25 °C and 350 °C

Cited by 7 publications

References 33 publications

Directed Energy Deposition‐Arc Repair Al6.5Cu2Ni0.3Ti0.5Zr0.25V Alloy: Microstructure Evolution and Strengthening Mechanism

Directed Energy Deposition‐Arc Repair Al6.5Cu2Ni0.3Ti0.5Zr0.25V Alloy: Microstructure Evolution and Strengthening Mechanism

Study on the microstructure and mechanical properties of ZK60 magnesium alloy with submicron twins and precipitates obtained by room temperature multi-directional forging

Research on microstructure and mechanical properties at elevated temperature of Al-Mg-Si-Sc-Zr alloy strengthened by Al3(Sc, Zr) nanoprecipitates

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