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 -