Multi-scale Curvature Analysis and Correlations with the Fatigue Limit on Steel Surfaces after Milling

Abstract : A strong correlation (R² >0.96) is found between machined surfaces and their fatigue limits. In a larger study, the four- point bending fatigue limit was determined on steel specimens milled with two different conditions, in two directions, with and without residual stresses relieved. Curvature analysis is shown here, based on Heron's formula, as a function of scale and position, on profiles extracted parallel to the direction of maximum tensile stress, from areal texture measurements. Several combinations of parameters are regressed linearly with the fatigue limits over a range of scales. The strongest correlations are found with the mean curvature plus two standard deviations, at a scale of 610μm. The correlation varies smoothly, although not monotonously, with respect to decreasing scale, with R² falling to zero at 100μm.
Complete list of metadatas

Cited literature [15 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01010455
Contributor : Yann Quinsat <>
Submitted on : Monday, December 8, 2014 - 11:13:49 AM
Last modification on : Friday, May 17, 2019 - 1:23:28 AM
Long-term archiving on : Monday, March 9, 2015 - 10:05:25 AM

Files

fatigue_CSI_12-13_ref_num_V5.p...
Files produced by the author(s)

Identifiers

Citation

Margot Vulliez, Matthew Gleason, Aurélien Souto-Lebel, Yann Quinsat, Claire Lartigue, et al.. Multi-scale Curvature Analysis and Correlations with the Fatigue Limit on Steel Surfaces after Milling. 2nd CIRP Conference on Surface Integrity (CSI), May 2014, Birmingham, United Kingdom. pp.308-313, ⟨10.1016/j.procir.2014.04.052⟩. ⟨hal-01010455⟩

Share

Metrics

Record views

308

Files downloads

362