Variability in Constant-Load-Amplitude Fatigue Crack Growth Rates in Marine Environments.

Abstract

This report describes the results of an interlaboratory test program conducted to (1) assess the variability in corrosion fatigue crack growth rate data obtained while using a proposed Navy standard test method, (2) identify and resolve problems with the proposed standard test method and (3) provide verification of the proposed standard test method. Data were generated for an HY-80 steel by 15 laboratories using 10 mm (0.4 in.) thick 1-T wedge-opening-loaded specimens. the crack growth rate data was analyzed graphically and statistically and the interlaboratory variability was determined for each set of test conditions. Owing to the lack of replicate tests, it was not possible to assess intralaboratory variability. Originator-supplied keywords: Base metal, Corrosion fatigue, Crack propagation, Nickel chromium steels, Sea water corrosion.

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Document Details

Document Type
Technical Report
Publication Date
Feb 25, 1985
Accession Number
ADA150786

Entities

People

  • S. J. Gill
  • Thomas W. Crooker

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • C4I
  • Counter IED
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Corrosion
  • Information Science
  • Intensity
  • Materials
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Regression Analysis
  • Salt Water
  • Sea Water
  • Sea Water Corrosion
  • Standards
  • Statistics
  • Stress Intensity Factors
  • Stresses
  • Test Methods

Readers

  • Aerospace Test and Evaluation
  • Metallurgy
  • Structural Health Monitoring of Composite Structures.