Next Article in Journal
Effects of Tungsten Addition on the Microstructure and Corrosion Resistance of Fe-3.5B Alloy in Liquid Zinc
Next Article in Special Issue
Corrosion-Fatigue Crack Growth in Plates: A Model Based on the Paris Law
Previous Article in Journal
Failure Mechanisms of the Coating/Metal Interface in Waterborne Coatings: The Effect of Bonding
Previous Article in Special Issue
Effects of Nitrogen and Tensile Direction on Stress Corrosion Cracking Susceptibility of Ni-Free FeCrMnC-Based Duplex Stainless Steels
Open AccessArticle

Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth

School of Aerospace Engineering, Xiamen University, Xiamen 361005, Fujian, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Alex A. Volinsky
Materials 2017, 10(4), 398; https://doi.org/10.3390/ma10040398
Received: 30 January 2017 / Revised: 26 March 2017 / Accepted: 7 April 2017 / Published: 9 April 2017
(This article belongs to the Special Issue Stress Corrosion Cracking in Materials)
For pre-corroded aluminum alloy 7075-T6, the interacting effects of two neighboring pits on the stress concentration are comprehensively analyzed by considering various relative position parameters (inclination angle θ and dimensionless spacing parameter λ) and pit depth (d) with the finite element method. According to the severity of the stress concentration, the critical corrosion regions, bearing high susceptibility to fatigue damage, are determined for intersecting and adjacent pits, respectively. A straightforward approach is accordingly proposed to conservatively estimate the combined stress concentration factor induced by two neighboring pits, and a concrete application example is presented. It is found that for intersecting pits, the normalized stress concentration factor Ktnor increases with the increase of θ and λ and always reaches its maximum at θ = 90°, yet for adjacent pits, Ktnor decreases with the increase of λ and the maximum value appears at a slight asymmetric location. The simulations reveal that Ktnor follows a linear and an exponential relationship with the dimensionless depth parameter Rd for intersecting and adjacent cases, respectively. View Full-Text
Keywords: pitting corrosion; stress concentration factor; finite element analysis; relative position parameters; pit depth pitting corrosion; stress concentration factor; finite element analysis; relative position parameters; pit depth
Show Figures

Figure 1

MDPI and ACS Style

Huang, Y.; Gang, T.; Chen, L. Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth. Materials 2017, 10, 398.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop