Author
Sajadifar, Seyed Vahid, Wegener, T., Yapıcı, Güney Güven, Niendorf, T.
Publication Date
2019-12
Publication Place
-
Elsevier
Subject
Ultra-fine grained titanium, Equal channel angular extrusion/pressing, Very high-cycle fatigue, Severe plastic deformation, Notch sensitivity, Fracture morphology
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0167-8442
Record ID
03584407-0d52-43aa-b04a-8e3ccae5cc8f
Library Location
Mechanical Engineering
Date
2019-12
Notes
Hessen State Ministry of Higher Education, Research and the Arts - Initiative for the Development of Scientific and Economic Excellence (LOEWE)
Sample Text
The very high-cycle fatigue performances of coarse-grained and ultrafine-grained titanium samples with different geometries at ambient temperature and various stress amplitudes were investigated. Severe plastic deformation improves monotonic strength of titanium at the cost of a loss in ductility. Ultrafine-grained titanium demonstrates a superior fatigue performance compared to that of coarse-grained counterparts in the high-cycle fatigue regime, however, suffers notch sensitivity. Furthermore, in the very high-cycle fatigue regime stress-life curves merge unexpectedly. Microstructural inhomogeneity in the ultrafine-grained titanium is expected to be the reason. Analysis of fracture surfaces reveals that the formation of fatigue slip marks is evident on the fatigued samples of both microstructural states. Ultrafine-grained titanium is more prone to the intergranular fracture.
DOI
10.1016/j.tafmec.2019.102362
Cilt
104
