Response of Short Cracks in High-Strength Steels to Fatigue Loadings—Part I: Behavior in Air and Freely Corroding in Seawater-Reference-Cited by-同舟云学术

Response of Short Cracks in High-Strength Steels to Fatigue Loadings—Part I: Behavior in Air and Freely Corroding in Seawater

Published:1995-08-01 Issue:3 Volume:117 Page:183-191
ISSN:0892-7219
Container-title:Journal of Offshore Mechanics and Arctic Engineering
language:en
Short-container-title:

Author:

Kim K.¹,Hartt W. H.²

Affiliation:

1. Korea Maritime University, Pusan, Korea

2. Center for Marine Materials, Department of Ocean Engineering, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431

Abstract

Experiments have been performed which determined the growth rate of short cracks (initial depth ~ 0.1 mm) for five high-strength steels (yield stress 370–570 MPa) in air and natural seawater. Attention was focused on regions I and II of the classical da/dN-ΔK curve with test conditions being relevant to offshore structure service. The results indicated enhanced growth rate for short fatigue cracks (a ⪝ 1 mm) in both environments. Parameters with which short crack fatigue behavior might best be correlated were investigated, and it was found that the enhanced fatigue crack growth rate associated with short cracks transitioned to long crack growth kinetics at a ΔK value which depended only upon environment. The significance of the results are discussed within the context of offshore structure integrity.

Publisher

ASME International

Subject

Mechanical Engineering,Ocean Engineering

Link

http://asmedigitalcollection.asme.org/offshoremechanics/article-pdf/117/3/183/5745498/183_1.pdf

Reference31 articles.

1. American Petroleum Institute, 1992, “Planning, Designing and Constructing Fixed Offshore Platforms,” API RP 2A, Dallas, TX.

2. American Welding Society, 1993, “Structural Welding Code, Steel,” ANSI/AWS D1.1-86, pp. 165–167, Miami, FL.

3. ASTM E 647-86a, 1987, “Standard Test Method for Measurement of Fatigue Crack Growth Rate,” Annual Book of ASTM Standards, American Society for Testing and Materials, Philadelphia, PA.

4. Badve, A. P., Hartt, W. H., and Rajpathak, S. S., 1989, “Effects of Cathodic Polarization upon Fatigue of Selected High Strength Steels in Seawater,” Paper No. 570 presented at CORROSION/89, New Orleans, LA.

5. Barsom, J. M., and Rolf, S. T., 1987, “Fatigue Crack-Propagation Threshold,” Fracture and Fatigue Control in Structures, 2nd Edition, Prentice-Hall, NJ, pp. 253–255.

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4. Response of Short Cracks in High-Strength Steels to Fatigue Loadings—Part II: Behavior in Seawater Under Cathodic Polarization;Journal of Offshore Mechanics and Arctic Engineering;1995-08-01