摘要
利用ABAQUS有限元软件,使用移动热源和生死单元技术对SLM成形过程的三维瞬态温度场进行动态数值模拟,有限元模型考虑了随温度变化的材料热物性参数、凝固-冷却过程中的相变潜热等因素,在不同的热源参数下,对界面附近的温度场进行了分析与计算。结果表明:采用蛇形路径,当激光热源功率为350 W,扫描速度0.25 mm/s时,能够在纯铝与AM60的界面形成冶金结合的同时获得较好的力学性能,其界面抗剪强度达到了75.5 MPa。
The combination of metallurgical bonding between dissimilar light metals in aluminum/magnesium lamellar compositeis a challenge. SLM（ selective laser melting technology） provides a newidea for the manufacture of aluminum/magnesium lamellar composite. Based on the ABAQUS finite element software,the dynamic numerical simulation of the three-dimensional transient temperature field of the SLMforming process is carried out on the basis of the mobile heat source and the birth-death element technology. The temperature field near the interface were analyzed and calculated with different heat source parameters by taking into accountthe thermal properties of the material with temperature change,solidification process of phase change latent heat and other factorsin the finite element model. The results showthat when the laser heat source power is 350 W and the scanning speed is 0. 25 mm/s,the metallurgical bonding can be formed at the interface between pure aluminum and AM60,and the mechanical strength is reached 75. 5 MPa.
作者
徐光晨
戴晓东
张旭
葛阿萍
XU Guang-chen;DAI Xiao-dong;ZHANG Xu;GE A-ping(School of Mechanical Engineering,Wuhu Institute of Technology,Wuhu 24 ]000,Anhui Provinc)
出处
《沈阳工程学院学报（自然科学版）》
2018年第3期279-288,共10页
Journal of Shenyang Institute of Engineering:Natural Science
基金
2017年校级自然科学研究项目(wzyzr201717)
2016年学校引进高层次人才科研启动资金项目(wzyrc201702)
关键词
ABAQUS
选区激光熔化
温度场
移动热源
生死单元
ABAQUS
selective laser melting
temperature field
moving heat source
birth-death element
