Effects of Y2O3 nanoparticles on the high-temperature oxidation behavior of IN738LC manufactured by laser powder bed fusion

Research output: Contribution to journalArticlepeer-review

Authors

  • Chuan Guo
  • Zhengrong Yu
  • Chang Liu
  • Xinggang Li
  • Qiang Zhu

Colleges, School and Institutes

External organisations

  • Southern University of Science and Technology

Abstract

Oxidation tests at 1095 °C were performed on cubes of IN738LC doped with Y2O3 nanoparticles processed by laser powder bed fusion (LPBF). Adding Y2O3 nanoparticles led to grain coarsening and the formation of Y4Al2O9, both of which were expected to lead to reduced corrosion resistance in this alloy through a change from an Al-type oxide scale to Cr-type. However, 0.05 wt% Y2O3 addition was found to nonetheless be beneficial for corrosion resistance. Results and mechanisms for this were discussed and further work was recommended, in particular for the grain coarsening.

Details

Original languageEnglish
Article number108715
Number of pages17
JournalCorrosion Science
Volume171
Early online date5 May 2020
Publication statusPublished - 15 Jul 2020

Keywords

  • additive manufacturing, nanoparticles, oxidation, grain growth, IN738LC, nickel-based superalloy, yttria, laser powder bed fusion, high-temperature oxidation