Microstructure-Based Fatigue Life Prediction Methods for Naval Steel Structures

Abstract

The goal of the subject program is to develop fundamental understandings of the relationships between microstructure and fatigue damage in structural steels of interest to naval applications. Quantitative descriptions of these relationships will be incorporated within practical engineering models for the prediction of S-N fatigue life. The focus of the first year of the program has been on experimental observations of fatigue damage in different microstructures for HSLA steels. Experimental methods were developed to study microcrack nucleation and growth with S-N fatigue specimens. Microstructures were modified with various heat treatments and characterized with appropriate optical and electron microscopy. The basic framework of potential microstructure-fatigue damage relationships has been sketched out.

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Document Details

Document Type
Technical Report
Publication Date
Jul 15, 1992
Accession Number
ADA254628

Entities

People

  • D. L. Davidson
  • K. S. Chan
  • R. C. Mcclung

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • C4I
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Amplitude
  • Ceramic Materials
  • Chemistry
  • Classification
  • Crystal Structure
  • Electron Microscopy
  • Elements
  • Fatigue Life
  • Grain Size
  • Heat Treatment
  • Materials
  • Mean Free Path
  • Measurement
  • Metals
  • Navy
  • Security
  • Submarine Hulls

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Systems Analysis and Design

Technology Areas

  • Microelectronics