The structure of the surface layer in titanium VT1-0 after high-cycle fatigue tests

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Konovalov, S.^1,2 ; Komissarova, I.^3 ; Chen, X.^1 ; Feoktistov, A.^3 ; Kosinov, D.^3 ; Gromov, V.^3 ; Ivanov, Yu.^4

Wenzhou University, Wenzhou University Town, Wenzhou

325035, China^1

Samara National Research University, Moskovskoye sh. 34, Samara

443086, Russia^2

Siberian State Industrial University, Kirova str. 42, Novokuznetsk

654007, Russia^3

Institute of High-Current Electronics, Siberian Branch, Russian Academy of Sciences, 2/3 Akademicheskii av., Tomsk

634021, Russia^4

关键词: Commercially Pure titaniums;    Electric current pulse;    Energy impact;    High cycle fatigue test;    High cycle fatigue testing;    Internal stress fields;    Surface layers;    Titanium VT1-0;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012075/pdf
DOI  :  10.1088/1757-899X/447/1/012075

来源: IOP

【 摘 要 】

Using the methods of optical and scanning electron microscopy, transformations that occur in the structure of commercially pure titanium VT1-0 subjected to electric-current pulse treatment and high-cycle fatigue testing to failure, were analyzed. The paper reports that as a result of the energy impact on the samples, its fatigue life increases by a factor of 1.3. It is revealed that the improvement of the fatigue life is possible due to the change in the size of crystallites in α-titanium, as well as to the decreased number of internal stress field concentrators in the surface layer.