Enhanced superplasticity in a Ti-6Al-4V alloy processed by severe plastic deformation

High elongations in Ti-6Al-4V alloy subjected to high pressure torsion were observed during tensile tests at relatively low temperatures, 650 deg and 725 deg C. The as-processed alloy exhibited high elongations even at high strain rates of 10 exp -2 and 10 exp -1 s exp -1 , indicating the appearance...

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Bibliographic Details
Published inScripta materialia Vol. 43; no. 9; pp. 819 - 824
Main Authors Sergueeva, A.V, Stolyarov, V.V, Valiev, R.Z, Mukherjee, A.K
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 16.10.2000
Subjects
High strain rate superplasticity
Severe plastic deformation
Ultrafine-grained titanium alloy
High strain rate superplasticity
Ultrafine-grained titanium alloy
Severe plastic deformation
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Summary:High elongations in Ti-6Al-4V alloy subjected to high pressure torsion were observed during tensile tests at relatively low temperatures, 650 deg and 725 deg C. The as-processed alloy exhibited high elongations even at high strain rates of 10 exp -2 and 10 exp -1 s exp -1 , indicating the appearance of high strain rate superplasticity. Enhanced superplasticity in the alloy subjected to high pressure torsion is associated with the formation of ultra-fine grains during heating after severe plastic deformation (SPD)-processing. An increase in applied pressure during high pressure torsion (HPT) leads to formation of yet smaller grain sizes.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(00)00496-6