Multiaxial fatigue strength assessment of electroslag remelted 50CrMo4 steel crankshafts
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In: International Journal of Fatigue, Vol. 100.2017, No. July, Part 1, 01.07.2017, p. 159-175.
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TY - JOUR
T1 - Multiaxial fatigue strength assessment of electroslag remelted 50CrMo4 steel crankshafts
AU - Leitner, Martin
AU - Tuncali, Zafer
AU - Steiner, Ralf
AU - Grün, Florian
PY - 2017/7/1
Y1 - 2017/7/1
N2 - This work investigates the fatigue strength of multiaxially-loaded gas engine crankshafts incorporating electroslag remelted 50CrMo4 steel. Uniaxial fatigue tests with small-scale round specimens before and after performing the ESR process are conducted. The results reveal that the high-cycle fatigue strength at the run-out region significantly decreases by 21% if no ESR-treatment is performed. Multiaxial fatigue tests under proportional normal and shear stress loading demonstrate that the elliptical model by Gough and Pollard leads to a minor underestimation of 5% compared to the test results. An application of several state-of-the-art equivalent stress hypotheses utilizing the critical plane approach is presented and the estimated results are compared to the experiments in terms of high-cycle fatigue resistance and crack initiation angle.
AB - This work investigates the fatigue strength of multiaxially-loaded gas engine crankshafts incorporating electroslag remelted 50CrMo4 steel. Uniaxial fatigue tests with small-scale round specimens before and after performing the ESR process are conducted. The results reveal that the high-cycle fatigue strength at the run-out region significantly decreases by 21% if no ESR-treatment is performed. Multiaxial fatigue tests under proportional normal and shear stress loading demonstrate that the elliptical model by Gough and Pollard leads to a minor underestimation of 5% compared to the test results. An application of several state-of-the-art equivalent stress hypotheses utilizing the critical plane approach is presented and the estimated results are compared to the experiments in terms of high-cycle fatigue resistance and crack initiation angle.
KW - Critical plane approach
KW - Electroslag remelting
KW - Equivalent stress concepts
KW - Multiaxial fatigue
KW - Notch stress assessment
UR - http://www.scopus.com/inward/record.url?scp=85016423870&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2017.03.023
DO - 10.1016/j.ijfatigue.2017.03.023
M3 - Article
AN - SCOPUS:85016423870
VL - 100.2017
SP - 159
EP - 175
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
IS - July, Part 1
ER -
