Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 139, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2020.105772
Keywords
Nitriding; Fatigue; Grain refinement; Commercially pure titanium; Tribology
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The combined effects of low-temperature nitriding (LTN) and cold rolling on the microstructure of commercially pure titanium (CP titanium) were investigated. The grain size of the LTN-treated CP titanium decreased with increasing thickness reduction due to the cold rolling pre-treatment and with decreasing the nitriding temperature. The fatigue limit for the nitrided CP titanium depended on the grain size beneath the nitrided layer and increased with decreasing the nitriding temperature because of the suppression of grain-coarsening. Furthermore, the LTN at 873 K decreased the friction coefficient and reduced the wear loss of CP titanium during the ball-on-disk dry friction tests.
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