High-Temperature Intergranular Crack Growth in Martensitic 2-1/4 Cr-1Mo Steel,

Abstract

Micromechanisms of high-temperature crack growth in martensitic 2 1/4 Cr-1Mo steel have been studied in vacuum, under static loading at 500 C. Detailed metallographic and fractographic measurements have been combined with Scanning Auger Microscopy and crack growth resistance curves to characterize the micro-mechanisms of failure. At low Stress intensities, the mode of crack growth is high-temperature, brittle intergranular fracture (HTBIGF) and is controlled by the dynamic segregation of sulphur to crack-tip regions. Crack advance appears to occur by discrete jumps when a critical concentration of sulphur is achieved over the jump distance. Keyword: Great Britain.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1987
Accession Number
ADA190096

Entities

People

  • C. A. Hippsley
  • P. Bowen

Tags

DTIC Thesaurus Topics

  • Auger Electrons
  • Chemistry
  • Crack Tips
  • Electron Microscopes
  • Electron Microscopy
  • Failure Mode And Effect Analysis
  • Grain Size
  • Heat Treatment
  • High Temperature
  • Materials
  • Materials Science
  • Measurement
  • Microscopy
  • Resistance
  • Solid Solutions
  • Spectra
  • Tensile Properties

Readers

  • Materials Science (Mechanical Engineering).