Study on Dynamic Mechanical Behavior of Al-Mg-Si Alloy
作者机构:Key Laboratory of Impact and Safety EngineeringMinistry of EducationNingbo UniversityNingbo 315211China Ningbo Zhanci New Material Co.Ltd.Ningbo 315338China
出 版 物:《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报(材料科学英文版))
年 卷 期:2024年第39卷第2期
页 面:454-462页
核心收录:
学科分类:08[工学] 0805[工学-材料科学与工程(可授工学、理学学位)] 080502[工学-材料学]
基 金:Funded by the National Key Laboratory of Shock Wave and Detonation Physics(No.JCKYS2023212005) the National Science Foundation of China(Nos.11972202 and 52005271) the State Key Laboratory for Advanced Metals and Materials(No.2023-Z04) the Major Project of Ningbo Science and Technology Innovation 2025(Nos.2021Z099 and 2023Z005) the K C Wong Magna Fund from Ningbo University
主 题:Al-Mg-Si alloy strain rate mechanical property microstructure Johnson-Cook model finite element simulation
摘 要:The dynamic mechanical behavior of Al-Mg-Si alloy was investigated under different strain rates by mechanical property and microstructure characterization,constitutive behavior analysis and numerical simulation in the present *** the strain rate increases,the yield strength,ultimate tensile strength and elongation increase first,then remain almost constant,and finally *** alloy always exhibits a typical ductile fracture mode,not depending on the strain ***,as the strain rate increases,the number of dimples gradually *** deformation can refine grains,however,the grain structure is slightly affected by the strain *** optimized Johnson-Cook constitutive equation was used to describe the mechanical behavior and obtained by fitting the true stress-strain *** parameter C was described by a function related to the strain *** fitting true stress-strain curves by the JC model agree very well with the experimental true stress-strain *** true stress-strain curves calculated by the finite element numerical simulation agree well with the experimental true stress-strain curves.