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On the brittle-to-ductile transition of the as-cast TiVNbTa refractory high-entropy alloy

Abstract:

The fracture properties of as-cast TiVNbTa, a refractory high-entropy alloy (RHEA), were investigated using four-point bending tests from -139°C to 20°C under a strain-rate of 10−3 s−1. From those tests and fractography, the conditional fracture toughness values and the brittle-to-ductile transition temperature were obtained. The brittle-to-ductile transition temperature was between -47°C to -27°C, which gives an estimated activation energy value of 0.52±0.09 eV for the alloy. This study prov...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.mtla.2020.100940

Authors


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Role:
Author
ORCID:
0000-0002-9220-2325
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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
ORCID:
0000-0002-8801-4102
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
Publisher:
Elsevier
Journal:
Materialia More from this journal
Volume:
14
Article number:
100940
Publication date:
2020-10-22
Acceptance date:
2020-10-21
DOI:
EISSN:
2589-1529
Language:
English
Keywords:
Pubs id:
1139119
Local pid:
pubs:1139119
Deposit date:
2020-10-22

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