[T6] AM Beam Based Technologies

[15B-T6-16] Mechanical Properties and Residual Stress Analysis of ODS Ni Superalloy
Fabricated by Laser Powder Bed Fusion Process

*D. Lee¹, S. Lee¹, C. Dhin Van¹, C. Kim¹, J. Kim¹, H. Kim², J. Lim³, T. Yoon³ (1.University of Ulsan, Korea, 2.Korea Institute of Industrial Technology, Korea, 3.DaiShinKangup Co.,Ltd, Korea)

キーワード：L-PBF, ODS Ni-Superalloy, AM, Microstructure, Residual stress

Oxide Dispersion Strengthened (ODS) superalloys are high-temperature alloys with enhanced mechanical properties at elevated temperatures. This is achieved by precipitating thermally stable fine oxides (such as Y2O3, ThO2) or carbides within the metal matrix1). These alloys are primarily used in the field of superalloys and recently, the principle has been applied to various metals, including aluminum and copper alloys.
In this research, the ODS Ni-superalloy powder similar to the composition of MA6000 was manufactured using a gas atomization process. A specimen of the produced ODS Ni-superalloy powder was prepared by an L-PBF process. We measured changes in densification behavior of specimens according to L-PBF process parameters and conducted residual stress measurements in order to identify issues arising during the processing steps. Additionally, we analyzed the powder and PBFed specimens of ODS Ni-Super alloy using optical microscopy, scanning electron microscopy, XRD, and LPS analysis.