Ni-based oxide dispersion strengthened (ODS) alloys have a higher usable temperature and better hightemperature mechanical properties than conventional superalloys. They are therefore being explored for applications in various fields such as those of aerospace and gas turbines. In general, ODS alloys are manufactured from alloy powders by mechanical alloying of element powders. However, our research team produces alloy powders in which the Ni₅Y intermetallic phase is formed by an atomizing process. In this study, mechanical alloying was performed using a planetary mill to analyze the milling behavior of Ni-based oxide dispersions strengthened alloy powder in which the Ni₅Y is the intermetallic phase. As the milling time increased, the Ni₅Y intermetallic phase was refined. These results are confirmed by SEM and EPMA analysis on microstructure. In addition, it is confirmed that as the milling increased, the mechanical properties of Ni-based ODS alloy powder improve due to grain refinement by plastic deformation.

Citations

Citations to this article as recorded by  

• Efficient prediction of corrosion behavior in ternary Ni-based alloy systems: Theoretical calculations and experimental verification
  Xuelian Xiao, Keke Chang, Kai Xu, Ming Lou, Liping Wang, Qunji Xue
  Journal of Materials Science & Technology.2023; 167: 94.     CrossRef
• Effect of high-energy ball milling on the microstructure and mechanical properties of Ni-based ODS alloys fabricated using gas-atomized powder
  Chun Woong Park, Won June Choi, Jongmin Byun, Young Do Kim
  Journal of Materials Science.2022; 57(38): 18195.     CrossRef

In this paper, a new Co₁₀Fe₁₀Mn₃₅Ni₃₅Zn₁₀ high entropy alloy (HEA) is identified as a strong candidate for the single face-centered cubic (FCC) structure screened using the upgraded TCFE2000 thermodynamic CALPHAD database. The Co₁₀Fe₁₀Mn₃₅Ni₃₅Zn₁₀ HEA is fabricated using the mechanical (MA) procedure and pressure-less sintering method. The Co₁₀Fe₁₀Mn₃₅Ni₃₅Zn₁₀ HEA, which consists of elements with a large difference in melting point and atomic size, is successfully fabricated using powder metallurgy techniques. The MA behavior, microstructure, and mechanical properties of the Co₁₀Fe₁₀Mn₃₅Ni₃₅Zn₁₀ HEA are systematically studied to understand the MA behavior and develop advanced techniques for fabricating HEA products. After MA, a single FCC phase is found. After sintering at 900°C, the microstructure has an FCC single phase with an average grain size of 18 μm. Finally, the Co₁₀Fe₁₀Mn₃₅Ni₃₅Zn₁₀ HEA has a compressive yield strength of 302 MPa.

Citations

Citations to this article as recorded by  

• Composites of equiatomic Y, La, Ce, Nd, and Gd rare earth oxides: Chemical-shift effects and valence spectra
  Jungsu Bin, Hyunbae Gee, Taesung Park, UiJun Go, Jeoung Han Kim, Youn-Seoung Lee
  Current Applied Physics.2024; 59: 85.     CrossRef
• Fabrication, microstructure and mechanical property of a novel Nb-rich refractory high-entropy alloy strengthened by in-situ formation of dispersoids
  Byungchul Kang, Taeyeong Kong, Ahmad Raza, Ho Jin Ryu, Soon Hyung Hong
  International Journal of Refractory Metals and Hard Materials.2019; 81: 15.     CrossRef