Effects of TCP and creep cavity on creep life in the rafting regime for Ru-containing Nickel-based single crystal superalloys

Yunsong Zhao, Junbo Zhao, Haibo Long, Yinong Liu, Yanhui Chen, Shengcheng Mao, Ze Zhang, Xiaodong Han

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Ru is crucial in improving creep properties in Nickel-based single-crystal superalloys. The effect of Ru content on the creep behavior of nickel-based single-crystal superalloy was studied. Ru exhibits unprecedented mechanical properties, increasing the creep life at 1120 °C but decreasing it at 1180 °C. This is due to the competition in the stress concentration formed between the topologically close-packed phases and the creep cavity. They are both related to the dissociation of the γ phase. The effect of oxidation caused by the addition of Ru is lower than these two factors. This work helps to recognize the comprehensive effect of Ru and can provide guidance for alloy design in the future.

Original languageEnglish
Pages (from-to)623-629
Number of pages7
JournalMaterials Research Letters
Volume11
Issue number8
DOIs
Publication statusPublished - 2023

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