Multiaxial fatigue strength assessment of electroslag remelted 50CrMo4 steel crankshafts. (July 2017)

• Record Type: Journal Article
• Authors: Leitner, M.; Tuncali, Z.; Steiner, R.; Grün, F.
• Is Part Of: International journal of fatigue. Volume 100:Part 1(2017)
• Page Start: 159
• Page End: 175
• Publication Date: 2017-07
• Subjects: Multiaxial fatigue -- Notch stress assessment -- Critical plane approach -- Equivalent stress concepts -- Electroslag remelting; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2017.03.023
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Effect of electroslag remelting (ESR) process on uniaxial fatigue strength. Multiaxial fatigue strength characterization of material in ESR condition. Application of equivalent stress criteria utilizing the cutting plane approach. Abstract: 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.