A study of white etching crack formation by compression-torsion experiments
Journal Title: Frattura ed Integrità Strutturale - Year 2016, Vol 10, Issue 38
Abstract
In this study, an attempt was made to recreate the bearing damage phenomenon “White Etching Cracks” with a simplified testing setup. Rolling contact fatigue conditions were simulated with in-phase and out-ofphase cyclic compression-torsion experiments on 100Cr6 steel specimens. The results are compared in terms of microstructural change. Focused Ion Beam and metallographic analysis reveal that a fine-grained, white etching zone formed in the vicinity of the fatigue cracks of specimens tested with the in-phase load pattern. In contrast, no such structures were found after testing the out-of-phase load pattern. The properties of the white etching zone are characterised in more detail and compared with White Etching Cracks
Authors and Affiliations
S. Averbeck, E. Kerscher
Keywords
Related Articles
- EP ID EP128656
- DOI 10.3221/IGF-ESIS.38.02
- Views 51
- Downloads 0
Evaluation of near-threshold fatigue crack propagation in Ti-6Al-4V Alloy with harmonic structure created by Mechanical Milling and Spark Plasma Sintering
Titanium alloy (Ti-6Al-4V) having a bimodal “harmonic structure”, which consists of coarsegrained structure surrounded by a network structure of fine grains, was fabricated by mechanical milling (MM) and spark pl...
Creep-fatigue life evaluation of high chromium ferritic steel under non-proportional loading
T Multiaxial creep-fatigue tests under non-proportional loading conditions with various strain rates were carried out using a hollow cylinder specimen of a high chromium ferritic steel at 823K in air to discuss th...
Fatigue life assessment of thin-walled welded joints under non-proportional load-time histories by the shear stress rate integral approach
Fatigue life tests under constant and variable amplitude loadings were performed on the tube-tube thin-walled welded specimens made of magnesium (AZ31 and AZ61) alloys. The tests included pure axial, pure torsiona...
Numerical investigation on stress corrosion cracking behavior ofdissimilar weld joints in pressurized water reactor plants
There have been incidents recently where stress corrosion cracking (SCC) observed in the dissimilarmetal weld (DMW) joints connecting the reactor pressure vessel (RPV) nozzle with the hot leg pipe. Due to thecomple...
Modelling of ultrasonic impact treatment (UIT) of welded joints and its effect on fatigue strength
Ultrasonic impact treatment (UIT) is a remarkable post-weld technique applying mechanical impacts in combination with ultrasound into the welded joints. In the present work, a 3D simulation method including w...