Refinement of A356 alloy using continuous rheological extrusion Al-Ti-V-B master alloy

作     者：Hong-fei Jia Guang-zong Zhang Shuo Zhang Da Teng Qing He Jun-wen Li Ren-guo Guan Hong-fei Jia;Guang-zong Zhang;Shuo Zhang;Da Teng;Qing He;Jun-wen Li;Ren-guo Guan

作者机构：Engineering Research Center of Continuous ExtrusionMinistry of EducationDalian Jiaotong UniversityDalian 116028LiaoningChina Key Laboratory of Near-Net Forming of Light Metals of Liaoning ProvinceDalian Jiaotong UniversityDalian 116028LiaoningChina 

出 版 物：《China Foundry》 (中国铸造(英文版))

年 卷 期：2025年第22卷第2期

页      面：222-230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 Research and Development Program of China (Grant No.2022YFB3706801) the National Natural Science Foundation of China (Grant Nos.U2341253,52371019,U2241232) the Dalian High-level Talents Innovation Support Program (Grant No.2021RD06) the Applied Basic Research Program of Liaoning Province (Grant No.2022JH2/101300003) the Natural Science Foundation of Liaoning Province (Grant Nos.2022-BS-262,JYTMS20230031) 

主　　题：A356 alloy continuous rheological extrusion grain refinement Al-Ti-V-B master alloy mechanical properties 

摘      要：Based on thermodynamic calculations and continuous rheological extrusion(CRE)technology,Al-Ti-V-B master alloys were designed and *** morphology and the distribution of the refined phases in the master alloys were analyzed by XRD,SEM,and *** effects of master alloy addition and holding time on the microstructure and mechanical properties of A356 alloy were *** the optimum refiner addition of 0.3wt.%and the holding time of 20 min,the average grain size of the refined A356 alloy is 151.8±9.11μm,89.62%lower than that of original A356 *** tensile strength and elongation of as-cast A356refined alloy are 196.11 MPa and 5.75%,*** T6 treatment,the tensile strength and elongation of A356 refined alloy are 290.1 MPa and 3.09%,*** fracture morphology is characterized by a predominance of along-crystal fracture with a small amount of through-crystal fracture,attributed to the refined *** grains promote crack path deflection and localized plastic deformation,enhancing energy dissipation and reducing the tendency for brittle *** study provides a novel approach to improving the mechanical properties of A356 alloy through grain refinement using CRE Al-Ti-V-B master alloy.