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Strain-rate dependence of the brittle-to-ductile transition temperature in tungsten

Abstract:
We have investigated the strain-rate dependence of the brittle-to-ductile transition (BDT) temperature in pre-cracked tungsten single-crystals and polycrystals. There is an unambiguous Arrhenius relationship over four decades of strain rate, giving an activation energy for the process controlling the BDT of 1.05 eV. This is equal to the activation energy for double-kink formation on screw dislocations, suggesting that their motion controls the brittle-ductile transition.
Publication status:
Published

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Publisher copy:
10.1080/14786430701253197

Authors


Giannattasio, A More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Journal:
PHILOSOPHICAL MAGAZINE
Volume:
87
Issue:
16-17
Pages:
2589-2598
Publication date:
2007
DOI:
EISSN:
1478-6443
ISSN:
1478-6435
URN:
uuid:077e8047-0a92-42d0-9889-fdccf5a36db3
Source identifiers:
4939
Local pid:
pubs:4939
Language:
English

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