XIAO S B,SONG D F,SONG Q F,et al. Microstructure and properties of AlSi10MnMg(Fe) alloy with high Fe content composite modified by Al-Sr-RE[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 590-1 595.
XIAO S B,SONG D F,SONG Q F,et al. Microstructure and properties of AlSi10MnMg(Fe) alloy with high Fe content composite modified by Al-Sr-RE[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 590-1 595.DOI: 10.15980/j.tzzz.H20250010.
Microstructure and Properties of AlSi10MnMg(Fe) Alloy with High Fe Content Composite Modified by Al-Sr-RE
Al-Sr-RE modified second phase in high-Fe content AlSi10MnMg(Fe) alloys was proposed to achieve grade-preserving utilization of recycled aluminum alloys. The microstructure and properties of high-Fe content AlSi10MnMg(Fe) alloys were systematically investigated using optical microscopy (OM), scanning electron microscopy (SEM), and mechanical testing equipment. The results indicate that Al-Sr-Ce composite modifier primarily consists of Al
4
Sr and Al
11
Ce
3
phases, and Sr and Ce form mutual solution. During gravity casting, Fe-rich phase is dominated by long needle-like morphology, which comprises fine granular and short rod-like iron-rich phases in die casting. The type of iron-rich phase is converted from single
δ
-Al
3
(Fe,Mn)Si
2
phase to mixture of
δ
-Al
3
(Fe,Mn)Si
2
and
π
-AlMgSiFe phases. The elongation of alloy by gravity casting is slightly lower than that of low-Fe industrial al
loys, while comprehensive mechanical properties of die-cast alloy reach advanced level. The reduced plasticity of high-Fe gravity-cast alloy is attributed to large amounts of long needle-like Fe-rich phases. Al-Sr-Ce is beneficial to modifying morphology of eutectic silicon and Fe-rich phases, thereby enhancing the plasticity.
PIATKOWSKI J , NOWINSKA K , MATULA T , et al . Microstructure and mechanical properties of AlSi10MnMg alloy with increased content of recycled scrap [J]. Materials , 2025 , 18 ( 5 ): 1 119 .
LIU W J , LI Y D , WANG Z Z , et al . Effects of Al-5Sr-5Sb modifiers prepared by various processes on microstructure, thermal conductivity, and mechanical properties of AlSi10MnMg alloy [J]. Transactions of Nonferrous Metals Society of China , 2025 , 35 ( 7 ): 2 164 - 2 182 .
LIU Y , YU Z C , ZHANG M , et al . The influence of the combined addition of La-Ce mixed rare earths and Sr on the microstructure and mechanical properties of AlSi10MnMg alloy [J]. Metals , 2024 , 14 ( 9 ): 1 050 .
LI Z D , LIMODIN N , TANJAOUI A , et al . Effect of Fe and Mn content on the microstructures and tensile behaviour of AlSi7Cu3 alloy: Thermal analysis and tensile tests [J]. Metals and Materials International , 2022 , 28 ( 9 ): 2 118 - 2 133 .
CHANYATHUNYAROJ K , PATAKHAM U , KOU S , et al . Mechanical properties of squeeze-cast Al-7Si-0.3Mg alloys with Sc-modified Fe-rich intermetallic compounds [J]. Rare Metals , 2018 , 37 ( 9 ): 769 - 777 .
HWANG J Y , DOTY H W , KAUFMAN M J . The effects of Mn additions on the microstructure and mechanical properties of Al-Si-Cu casting alloys [J]. Materials Science and Engineering , 2008 , A 488 ( 1-2 ): 496 - 504 .
SONG D F , ZHAO Y L , JIA Y W , et al . Study of the evolution mechanisms of Fe-rich phases in Al-Si-Fe alloys with Mn modification using synchrotron X-ray imaging [J]. Journal of Alloys and Compounds , 2022 , 915 : 165 378 .
SONG D F , ZHAO Y L , JIA Y W , et al . Synergistic effects of Mn and B on iron-rich intermetallic modification of recycled Al alloy [J]. Journal of Materials Research and Technology , 2023 , 24 : 527 - 541 .
JIAO X Y , ZHANG Y F , WANG J , et al . Characterization of externally solidified crystals in a high-pressure die-cast AlSi10MnMg alloy and their effect on porosities and mechanical properties [J]. Journal of Materials Processing Technology , 2021 , 298 : 117 299 .
YANG D Y , SONG D F , TANG C Y , et al . The 3D morphology morphological evolution of Fe-rich phase and mechanical properties in recyclable A356 alloy [J]. Materials Today Communications , 2024 , 41 : 110 425 .
HU X Y , SONG D F , WANG H P , et al . Effect of ultrasonic-assisted modification treatment on the microstructure and properties of A356 alloy [J]. Materials , 2022 , 15 : 3 714 .
YANG D M , CAI Y H , SONG D F , et al . A novel modifier Al-Sr-RE for improving the microstructure and mechanical properties of recycled AA3104 alloy [J]. Journal of Alloys and Compounds , 2025 , 2022 : 179 744 .
GAO X D , SONG D F , YANG D Y , et al . The effect of Al-Sr-Ce synergistic modification on the microstructure and mechanical properties of Al-15Mg 2 Si composites [J]. Journal of Alloys and Compounds , 2025 , 1022 : 179 999 .
YI J Z , GAO Y X , LEE P D , et al . Effect of Fe-content on fatigue crack initiation and propagation in a cast aluminum-silicon alloy (A356-T6) [J]. Materials Science and Engineering , 2004 , A 386 ( 1-2 ): 396 - 407 .
SONG D F , ZHAO Y L , WANG Z , et al . 3D Fe-Rich phases evolution and its effects on the fracture behavior of Al-7.0Si-1.2Fe alloys by Mn neutralization [J]. Acta Metallurgica Sinica (English Letters) , 2022 , 35 ( 1 ): 163 - 175
SEIFEDDINE S , JOHANSSON S , INGVAR L , et al . The influence of cooling rate and manganese content on the beta Al 5 FeSi phase formation and mechanical properties of Al-Si based alloys [J]. Materials Science and Engineering , 2008 , A 490 ( 1-2 ): 385 - 390 .