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Ding, Rengen; Chiu, Yulung; Chu, Mingqiang; Paddea, Sanjooram and Su, Guanqiao
(2020).
DOI: https://doi.org/10.1080/14786435.2020.1714088
Abstract
Microcantilevers were machined from a single lamellae colony of a polycrystalline commercial Ti-45Al-2Mn-2Nb sample using the focussed ion beam. The long axis of the microcantilevers is perpendicular to the lamellar interface with the notch prepared in the same γ lamella. Bending test results demonstrated good repeatability and the fracture stress intensity factor of individual γ lamella was measured to be
.
twinning ahead of the notch (crack) tip plays a key role in the crack initiation. TEM analysis shows that the interaction of twinning with the lamellar interface leads to interfacial cracking and contributes to the work-hardening observed.
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- Item ORO ID
- 69156
- Item Type
- Journal Item
- ISSN
- 1478-6435
- Keywords
- Fracture; FIB; Electron microscopy; γ-TiAl; Microcantilever
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
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