残余应力
材料科学
融合
激光器
选择性激光熔化
梁(结构)
金属粉末
激光功率缩放
残余物
激光束
过程(计算)
聚变能
复合材料
金属
微观结构
光学
冶金
计算机科学
等离子体
哲学
语言学
物理
算法
量子力学
操作系统
作者
Wenyou Zhang,William M. Abbott,Arnoldas Sasnauskas,Rocco Lupoi
出处
期刊:Metals
[Multidisciplinary Digital Publishing Institute]
日期:2022-02-27
卷期号:12 (3): 420-420
被引量:14
摘要
Laser beam powder bed fusion (PBF-LB) additive manufacturing (AM) is an advanced manufacturing technology that manufactures metal components in a layer-by-layer manner. The thermal residual stress (RS) induced by the repeated heating–melting–cooling–solidification processes of AM is considered to limit the wider uptake of PBF-LB. A dual-laser beam PBF-LB strategy, with an additional auxiliary laser and reduced power, working in the same powder bed simultaneously, was recently proposed to lower RS within the manufactured components. To provide insights into the optimum PBF-LB AM configurations and process parameters for dual-laser PBF-LB, this study proposed three different coordinated heating strategies (i.e., parallel heating, post-heating, and preheating) of the auxiliary heat source. The temperature fields and RS of dual-laser beam PBF-LB, for Ti-6Al-4V with different process parameters, were computationally investigated and optimized by the thermo-mechanically coupled 3D models. Compared with the single beam PBF-LB, parallel heating, post-heating, and post-heating strategies were proved as effective approaches to reduce RS. Among these, the preheating scanning is predicted to be more effective in mitigating RS, i.e., up to a 10.41% RS reduction, compared with the single laser scanning. This work could be beneficial for mitigating RS and improve the mechanical properties of additively manufactured metal components.
科研通智能强力驱动
Strongly Powered by AbleSci AI