Improvement of oxidation resistance and alumina regrowth ability of Ni-30Cr-5Al alloy without and with Y: Nanocrystallization effect

作者：Xie, Yun; Su, Chang; Huang, Zongxiang; Shu, Xiaoyong; You, Limei; Peng, Xiao^*

来源：Corrosion Science, 2023, 223: 111472.

DOI：10.1016/j.corsci.2023.111472

• alloy
• oxidation
• high temperature oxidation

Nanocrystallization of Ni-Cr-Al alloys decreases critical Al content (N*(Al)) for Al2O3 scale formation down to a level much lower than practical alloy Al content (N-Al), and this is particularly prominent for the alloys with N-Al= N*(Al). In this work, oxidation of coarse-grained (CG) Ni-30Cr-5Al with N-Al > N*(Al) and its nanocrystalline (NC) counterpart has been studied, with the focuses on the following issues: (i) nanocrystallization effect on Al2O3 steadystate growth and regrowth; (ii) nanograin growth effect on Al2O3 adhesion; and (iii) role of Y played in NC alloys by comparing the differences in oxidation of the NC alloys without and with Y.

• 单位
  南昌航空大学