Experimental-numerical study of laser-shock-peening-induced retardation of fatigue crack propagation in Ti-17 titanium alloy
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in: International Journal of Fatigue, Jahrgang 145, 106081, 01.04.2021.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Experimental-numerical study of laser-shock-peening-induced retardation of fatigue crack propagation in Ti-17 titanium alloy
AU - Sun, Rujian
AU - Keller, Sören
AU - Zhu, Ying
AU - Guo, Wei
AU - Kashaev, Nikolai
AU - Klusemann, Benjamin
PY - 2021/4/1
Y1 - 2021/4/1
N2 - Residual stresses induced by laser shock peening in Ti-17 titanium specimens were experimentally and numerically investigated to identify the mechanisms and generation conditions of the retardation of fatigue crack propagation (FCP). The retardation was experimentally observed with fatigue life prolonged by 150%. A multi-step simulation strategy for fatigue life prediction is applied, which successfully predicts the experimentally observed FCP behavior. The fractographic observations and numerical simulation indicate that crack closure, as opposed to other microstructural influences, is the dominant effect on retardation. The studies of multi-FCP aspects show that significant retardation occurs in specimens at high values of residual stresses, small peening gap distances, and lower externally applied loads.
AB - Residual stresses induced by laser shock peening in Ti-17 titanium specimens were experimentally and numerically investigated to identify the mechanisms and generation conditions of the retardation of fatigue crack propagation (FCP). The retardation was experimentally observed with fatigue life prolonged by 150%. A multi-step simulation strategy for fatigue life prediction is applied, which successfully predicts the experimentally observed FCP behavior. The fractographic observations and numerical simulation indicate that crack closure, as opposed to other microstructural influences, is the dominant effect on retardation. The studies of multi-FCP aspects show that significant retardation occurs in specimens at high values of residual stresses, small peening gap distances, and lower externally applied loads.
KW - Fatigue crack propagation
KW - Laser shock peening
KW - Numerical simulation
KW - Residual stress
KW - Stress intensity factor
KW - Ti-17 titanium alloy
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85099478067&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/64d9e431-1163-33ed-a78d-8262041c2bb7/
U2 - 10.1016/j.ijfatigue.2020.106081
DO - 10.1016/j.ijfatigue.2020.106081
M3 - Journal articles
AN - SCOPUS:85099478067
VL - 145
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
M1 - 106081
ER -