Effects of Surface Roughness on the Fatigue Life of Alloy Steel

W.L. Xiao; H.B. Chen; Yan Yin

doi:10.4028/www.scientific.net/KEM.525-526.417

Paper Titles

Numerical Simulation of Hypervelocity Impact on Mesh Bumper Causing Fragmentation and Ejection
p.401

Analysis of Crack Arrest by Electromagnetic Heating in Metal with Oblique-Elliptical Embedding Crack
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Effect of Characteristic Parameters of Exponential Cohesive Zone Model on Mode I Fracture of Laminated Composites
p.409

Extended Finite Element Method for Fracture Mechanics and Mesh Refinement Controlled by Density Function
p.413

Effects of Surface Roughness on the Fatigue Life of Alloy Steel
p.417

Correlation between Alternating Temperature Accelerated Aging and Real World Storage of Composite Propellant
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Experimental Research on Fracture Toughness of High Grade Line Pipe
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Stress-Strain Analysis of Composite Propellant under Cyclic Temperature Loads
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Damage Detection for Structural Health Monitoring Using Ultrasonic Guided Waves
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 525-526Effects of Surface Roughness on the Fatigue Life...

Effects of Surface Roughness on the Fatigue Life of Alloy Steel

Abstract:

Surface roughness characterizes the micro-geometric appearance variation and significantly affects the fatigue properties of machined specimen. Low cycle fatigue (LCF) tests of alloy steel specimens with different surface roughness were carried out in this paper to investigate the effect of roughness on fatigue life. The dumbbell plate specimens were tested in uniaxial stress-controlled mode on the hydraulic servo machine at room temperature. Obviously discrepant lifetime results corresponding to different surface roughness implied that the greater the roughness was, the lower the fatigue life was. An approximate power function relationship between the roughness and the fatigue life was established through the fitting of the experimental data.