The Influence of Grain Boundary Fracture on Fragmentation Behaviour. Part 2

Abstract

The effect of grain boundary sulphide precipitation on fragmentation performance has been investigated for low alloy steel cylinders tempered at selected temperatures within the range 150 C to 550 C. It was found that, as expected, increased cylinder hardness generally increased the fineness of cylinder fragmentation for both specially heat-treated cylinders with sulphide precipitates present at grain boundaries, as well as standard untreated cylinders. Over the range of tempering temperatures used, the specially treated cylinders, however, showed generally finer fragmentation as measured by a 15% to 30% increase in the Length Normalized Payman Fragmentation Parameter measured for these cylinders. Both fractographic and metallographic evidence indicated that the presence of grain boundary sulphide precipitation assisted in cylinder breakup for steel of the type tested.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1991
Accession Number
ADA250318

Entities

People

  • George M. Weston
  • Norbert M. Burman

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Counter IED
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Cracks
  • Electron Microscopy
  • Explosives
  • Fragmentation
  • Grain Boundaries
  • Hardness
  • Heat Energy
  • Heat Treatment
  • High Explosive Ammunition
  • High Explosives
  • High Temperature
  • Low Alloy Steels
  • Materials
  • Precipitation
  • Steel
  • Tempering

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.