Prediction of Primary Dendrite Arm Spacing in Pulsed Laser Surface Melted Single Crystal Superalloy
Prediction of Primary Dendrite Arm Spacing in Pulsed Laser Surface Melted Single Crystal Superalloy
复制标题
脉冲激光表面熔化单晶高温合金中一次枝晶臂间距的预测
DOI：
10.1007/s40195-020-01156-3
复制
发表时间：
2020-11-03
影响因子：
3.5
通讯作者：
Zhou, Xin
中科院分区：
文献类型：
--
作者：
Ci, Shiwei;Liang, Jingjing;Zhou, Xin
初生枝晶臂间距（PDAS）是镍基单晶高温合金的重要组织特征。本文将脉冲激光增材制造过程中PDAS的理论模型与温度场计算模型相结合，建立了脉冲激光增材制造参数下PDAS演化的数值模型。在此模型的基础上，生成了过程参数与pda演化相关的加工映射。为了获得更准确的预测模型，选取不同凝固条件下的参数，和，来计算PDAS。仿真结果表明，PDAS随P和t的增大而增大，加工-PDAS图可以准确预测脉冲激光工艺参数下PDAS的变化，与实验结果吻合较好。此外，该方法计算的PDAS值与实验结果更符合。
Primary dendritic arm spacing (PDAS) is an important microstructure feature of the nickel-base single crystal superalloys. In this paper, a numerical model predicting the PDAS evolution with additive manufacturing parameters using pulsed laser is established, which combines the theoretical PDAS models with the temperature field calculation model during pulsed laser process. Based on this model, processing maps that related process parameters to the evolution of PDAS are generated. To obtain more accurate prediction model, the parameters of different solidification conditions,and, are selected to calculate PDAS. The simulation results show that the PDAS increases as the arise of P and t. The processing-PDAS map can accurately predict the evolution of PDAS with pulsed laser process parameters, which is well in accordance with the experimental results. Additionally, the PDAS values calculated by theare more in line with the experimental results than those calculated by the.