Dislocation network on the curved end face of α precipitates in a Ti-8 wt.% Fe alloy

ABSTRACT

A complex dislocation network on the curved end face of the α precipitate in a Ti-8 wt.% Fe alloy was observed using transmission electron microscopy (TEM). The Burgers vectors of these dislocations were determined by $\mathrm{g}\cdot \mathrm{b}$ contrast analysis, and the planes of the dislocation loops made up of the dislocations were calculated according to a series of TEM images. The interfacial structure was well interpreted by a generalized O-element approach. The determination of the planes of the dislocation loops on the end face implies that the dislocation loops lie in irrational planes rather than slip planes. These experimental results provide useful data for further study of migration of the interface.

KEYWORDS:

• Titanium alloys
• interfacial structures
• dislocations
• transmission electron microscopy
• phase transformation
• crystallography

Acknowledgements

The authors gratefully acknowledge the financial supports from National Natural Science Foundation of China (grant number 51871131) and from National Key Research and Development Program of China (grant number 2016YFB0701304).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability

The raw/processed data required to reproduce these findings cannot be shared at this time due to technical or time limitations.

Additional information

Funding

This work was supported by National Natural Science Foundation of China: [Grant Number 51871131]; National Key Research and Development Program of China: [Grant Number 2016YFB0701304].