Sonic Fatigue Testing of a Functionally Graded Ti/TiB Material

Abstract

The objective of this program was to determine how a functionally graded metal-ceramic material responds to high-frequency loading that is characteristic of sonic fatigue. This material has potential use as skins of aerodynamically heated structure and will experience fluctuating pressure that may result in sonic fatigue. Fatigue cracking starts in the brittle ceramic-rich layer. It was thought that the ductile metal-rich layers would increase the life of the specimen over a monolithic ceramic-rich specimen. This could not be confirmed nor refuted with the limited test data obtained. It was clear that a better sonic fatigue test method is needed for these types of materials. The current test method does not maintain sufficient control of the test.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2008
Accession Number
ADA477877

Entities

People

  • Carl J Boehlert
  • Eric J. Tuegel
  • Jeffrey Quast
  • Larry Byrd

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Advanced Materials
  • Air Force
  • Air Force Research Laboratories
  • Aircrafts
  • Ceramic Materials
  • Failure Mode And Effect Analysis
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • Frequency
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Sonic Fatigue
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Marine Ecotoxicology
  • Mechanical Engineering/Mechanics of Materials.