残余应力
材料科学
残余物
刚度(电磁)
热传导
钛合金
融合
合金
样品(材料)
复合材料
计算机科学
热力学
算法
语言学
物理
哲学
作者
Zhihua Xiao,Jifu Zhou,Qi Yang,Yizhe Huang,Shui-Sheng Chen,Jun Wang,Haihong Zhu
标识
DOI:10.1016/j.jmrt.2023.11.139
摘要
Support structures are widely used in laser powder bed fusion (LPBF) for overhanging features. However, the majority of works carried out on support modeling were to obtain the best trade-off between production time, cost, and accuracy. A notable absence in the existing literature pertains to investigate support structure modeling for optimizing heat dissipation and residual stresses for improving the support structure, thus, enhancing the final part quality. In this study, the effects of the support structure on residual stress were investigated systematically. The influences of the support on residual stress in LPBF sample were categorized into the effect of the constraints and heat conduction area. The rigidity and area of the support structure are used to describe the effect of the support structure on the residual stress. The results showed that the constrain of LPBF samples mainly depends on their inherent characteristics, with limited impact from external constraints. The residual stress in the samples increased as the support area increased. Therefore, when designing the support, priority should be given to reduce its thermal conductivity area. In addition, the hardness of the support added sample were lower than that of the sample without the support, but the hardness distribution is uniform along the deposition height regardless of whether the support is added or not. Therefore, the introduction of support does not result in performance irregularities along the sample height direction.
科研通智能强力驱动
Strongly Powered by AbleSci AI