TY - JOUR
T1 - Fretting fatigue characteristics of Ti-6Al-4V alloy with a gradient nanostructured surface layer induced by ultrasonic surface rolling process
AU - Liu, Chengsong
AU - Liu, Daoxin
AU - Zhang, Xiaohua
AU - Ao, Ni
AU - Xu, Xingchen
AU - Liu, Dan
AU - Yang, Jing
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/8
Y1 - 2019/8
N2 - A gradient nanostructured (GNS) surface layer is synthesized on the surface of a Ti-6Al-4V alloy by means of the ultrasonic surface rolling process (USRP). The mean grain sizes on the topmost surface and at depth of 10 μm from the treated surface are approximately 45.8 and 87.5 nm, respectively. Fretting fatigue (FF) testing shows a 113.6% improvement in the fatigue strength after USRP as compared with the untreated condition. The mechanism through which the USRP improves the FF properties can be attributed to the comprehensive effect of the compressive residual stress, GNS surface layer, surface work hardening, and surface roughening. Among these, the compressive residual stress is the main factor in determining the FF behavior, due to the beneficial effect of compressive residual stress on the suppression of FF crack initiation and premature growth.
AB - A gradient nanostructured (GNS) surface layer is synthesized on the surface of a Ti-6Al-4V alloy by means of the ultrasonic surface rolling process (USRP). The mean grain sizes on the topmost surface and at depth of 10 μm from the treated surface are approximately 45.8 and 87.5 nm, respectively. Fretting fatigue (FF) testing shows a 113.6% improvement in the fatigue strength after USRP as compared with the untreated condition. The mechanism through which the USRP improves the FF properties can be attributed to the comprehensive effect of the compressive residual stress, GNS surface layer, surface work hardening, and surface roughening. Among these, the compressive residual stress is the main factor in determining the FF behavior, due to the beneficial effect of compressive residual stress on the suppression of FF crack initiation and premature growth.
KW - Compressive residual stress
KW - Fretting fatigue
KW - Gradient nanostructured surface layer
KW - Ti-6Al-4V alloy
KW - Ultrasonic surface rolling process
UR - http://www.scopus.com/inward/record.url?scp=85063760250&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2019.03.042
DO - 10.1016/j.ijfatigue.2019.03.042
M3 - 文章
AN - SCOPUS:85063760250
SN - 0142-1123
VL - 125
SP - 249
EP - 260
JO - International Journal of Fatigue
JF - International Journal of Fatigue
ER -