Effects of yttrium addition and aging on mechanical properties of AA2024 fabricated through multi-step stir casting

作     者：CH.S.VIDYASAGAR D.B.KARUNAKAR CH.S.VIDYASAGAR;D.B.KARUNAKAR

作者机构：Metallurgical and Materials Engineering DepartmentIndian Institute of Technology Roorkee-247667India Mechanical and Industrial Engineering DepartmentIndian Institute of Technology Roorkee-247667India 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2020年第30卷第2期

页      面：288-302页

核心收录：

学科分类：080503[工学-材料加工工程] 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）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

主　　题：yttrium artificial aging mechanical properties multi-step stir casting precipitation microstructure characterization 

摘      要：The effects of yttrium and artificial aging on AA2024 alloy were *** developed samples were further subjected to artificial aging at 190℃for 1-10 h with an interval of 1 *** metallurgical characterization was done by scanning electron microscope and X-ray *** mechanical characterization like hardness and tensile strength of the samples was done using computerized Vickers hardness testing machine and universal testing *** microstructures revealed that addition of yttrium refined theα(Al)matrix and led to the formation of Al-Cu-Y intermetallic in the shape of Chinese script which strengthened the *** to the base metal,samples with yttrium addition showed better mechanical *** sample reinforced with 0.3 wt.%yttrium showed the highest mechanical properties with the hardness of 66 HV,UTS of 223 MPa,YS of 180 MPa,and elongation of 20.9%.The artificially aged samples showed that the peak hardening of all the samples took place within 5 h of aging at 190℃with Al2 Cu *** changed the intermetallic from Chinese script to the fibrous *** optimum amount of yttrium addition to AA2024 was found to be 0.3 wt.%.