高温合金中硼化物精细结构的高空间分辨电子显微学研究

Translated title of the contribution: High-Resolution Transmission Electron Microscopic Study of Various Borides Precipitated in Superalloys

Xiuliang Ma*, Xiaobing Hu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Microelement B is widely added into almost all commercial superalloys because B contributes to strengthening grain boundaries at high temperature during service. Generally, B is present in two different forms. Besides the solute state in matrix, B tends to react with transition elements at high temperatures, giving rise to various borides including M 2 B, M 3 B 2 and M 5 B 3 phases. An accurate knowledge of the microstructural characterizations of these borides is of great importance for a better understanding of the structure-property relationship and designing materials with improved properties. By means of various advanced techniques based on the aberration-corrected transmission electron microscopy (TEM), microstructural features of above borides have been systematically investigated. Various defect features which were controversial in the past have been clarified. In this paper, after a brief review on the studies of borides, the atomic- scale information on the microstructural features has been presented. Finally, some prospects for future studies have been proposed.

Translated title of the contributionHigh-Resolution Transmission Electron Microscopic Study of Various Borides Precipitated in Superalloys
Original languageChinese
Pages (from-to)1503-1524
Number of pages22
JournalJinshu Xuebao/Acta Metallurgica Sinica
Volume54
Issue number11
DOIs
StatePublished - Nov 11 2018

Keywords

  • Boride
  • Crystallographic feature
  • Polyhedral stacking
  • Superalloy
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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