Effect of local loading on microstructure and enhanced mechanical property of large complex castings prepared by Al-Si-Fe-Mn-Mg-Cu alloy during squeeze casting

作     者：Shuancheng Meng Minqiang Gao Yan Liu Li Yang Huan Ma Jiehua Li Jianjun Wang Renguo Guan Shuancheng Meng;Minqiang Gao;Yan Liu;Li Yang;Huan Ma;Jiehua Li;Jianjun Wang;Renguo Guan

作者机构：School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Key Laboratory of Near-Net Forming of Light Metals of Liaoning ProvinceDalian Jiaotong UniversityDalian 116028China Engineering Research Center of Continuous ExtrusionMinistry of EducationDalian Jiaotong UniversityDalian 116028China Institute of Casting ResearchMontanuniversität LeobenLeoben A-8700Austria 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术(英文版))

年 卷 期：2024年第200卷第33期

页      面：215-226页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Key Re-search and Development Program of China(No.2022YFE0137900) National Natural Science Foundation of China(Nos.U2341253,U2241232,52371019 and 52301034) Natural Science Foundation of Liaoning Province(No.2023-BS-170) Dalian High-level Talents Innovation Support Program(No.2021RD06) Applied Basic Research Program of Liaoning Province(No.2022JH2/101300003) 

主　　题：Al-Si-Fe-Mn-Mg-Cu alloy Squeeze casting Local loading Refinement Solidification defects Strengthening mechanism 

摘      要：Flywheel shells with a complex structure and large wall-thickness difference,as key components in heavy trucks,serve to connect the engine and *** and mechanical performance control of such components should be taken into *** this work,an Al–Si–Fe–Mn–Mg–Cu alloy was used to manufacture the flywheel shell via squeeze *** role of local loading on microstructure and mechanical property at thick-walled positions was ***,the effect of the squeeze casting specific pressure and heat treatment on the microstructure and mechanical property of the Al–Si–Fe–Mn–Mg–Cu alloy flywheel shells was also *** results showed that at the thickwalled positions,local loading not only helped eliminate the solidification defects,but also refined the microstructure includingα-Al grains and secondary dendrite arm *** increasing the squeeze casting specific pressure from 24 MPa to 32 MPa,microstructure refinement and mechanical property enhancement of squeeze casting flywheel shells were *** T6 heat treatment,the yield strength and ultimate tensile strength of flywheel shells were further increased to 261.8 and 318.4 MPa,respectively,owing to the formation of spherical eutectic Si phases and nano-sizedβ’’,Q and S precipitates.