Effect of chemical composition on particle morphology of topologically close-packed precipitates in a Ni-based single crystal superalloy

Haibo Long, Yinong Liu, Shengcheng Mao, Hua Wei, Jianxin Zhang, Shiyu Ma, Qingsong Deng, Yanhui Chen, Ze Zhang, Xiaodong Han

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Topologically close-packed (TCP) phases in Ni-based single crystal superalloys are known to exhibit different morphologies and orientation relationships within the matrix. This study investigated the influence of chemical composition on lattice parameters, which in turn determine the interface lattice misfit between TCP phase and matrix and thus shape and orientation of the TCP phase. In this study, TCP phase particles of different morphologies were formed by ageing at different temperatures. The level of TCP-phase element enrichment was found to increase with increasing growth time and ageing temperature, and thus leads to a same evolution behavior of the atomic volume.

Original languageEnglish
Pages (from-to)100-105
Number of pages6
JournalScripta Materialia
Volume157
DOIs
Publication statusPublished - 1 Dec 2018

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