首页|Particle size dependence of the microsegregation and microstructure in the atomized Ni-based superalloy powders:Theoretical and experimental study

Particle size dependence of the microsegregation and microstructure in the atomized Ni-based superalloy powders:Theoretical and experimental study

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The microstructure and microsegregation of atomized powder,which depend on their sizes,are of great importance to the mechanical properties of the consolidated bulk materials.Therefore,it is necessary to reveal the relationship between particle size and powder attributes.The effects of particle size on the so-lidification characterization of the atomized Ni-based superalloy powders were studied via finite element simulation.Based on the simulations,a model was developed to predict the microsegregation and mi-crostructure of atomized powders with different sizes and study the influence of thermal history on the powder attributes during the atomization processes.The radiation heat transfer and temperature gradi-ent within the rapid solidification alloy powders were taken into account in this model.For validating the accuracy of the model,the predictions of the present model were compared with the microsegregation and microstructure of the specific size powder close to the screen mesh size.The results showed that mi-crostructure depended primarily on the temperature gradient within the powder,while the solidification rate had a more significant effect on the microsegregation.The model predicted microstructure features in agreement with the experiment,and for microsegregation,the deviations of prediction for most ele-ments were less than 10％.This work provides a new model to precisely predict the microsegregation and microstructure of the atomized alloy powders and sets a foundation to control the powder features for various engineering applications.

Particle sizeSolidification microstructureMicrosegregationNumerical simulation

Jikang Li、Mingsheng Yang、Yunfei Cai、Yuanyuan Zhang、Qingshuai Feng、Jiantao Liu、Tong Liu

展开 >

Key Laboratory of Aerospace Materials and Performance(Ministry of Education)School of Materials Science and Engineering,Beihang University,Beijing 100191,China

Central Iron and Steel Research Institute,Beijing 100081,China

National Science and Technology Major ProjectNational Key Research and Development Program of ChinaNational Natural Science Foundation of China

2017-VI-0008-00782022YFB3803802U1560106

2024

10.1016/j.jmst.2023.07.006

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.171(4)
  • 50