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Fatigue Life and Failure Characteristics of an Ultrafine‐Grained Ti–6Al–4V Alloy Processed by ECAP and Extrusion
Author(s) -
Polyakov Alexander V.,
Semenova Irina P.,
Huang Yi,
Valiev Ruslan Z.,
Langdon Terence G.
Publication year - 2014
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201300530
Subject(s) - materials science , dimple , alloy , pressing , extrusion , severe plastic deformation , metallurgy , deformation (meteorology) , fracture (geology) , stress (linguistics) , composite material , linguistics , philosophy
Experiments were conducted to investigate the low‐cycle deformation behavior of an ultrafine‐grained (UFG) Ti–6Al–4V alloy produced by severe plastic deformation (SPD) through a combination of equal‐channel angular pressing (ECAP) and extrusion. The fatigue properties were examined by stress‐controlled fatigue testing at stress amplitudes in the range of 700–1050 MPa. The specimens exhibited a dimpled final overload fracture mode. The results show the UFG alloy has a longer fatigue life and a finer dimple size than the coarse‐grained material.