Mechanical Properties and Microstructure of Thermomechanically Processed, High Manganese Steel

Abstract

Thermomechanical treatments (TMT's) were performed on an austenitic Fe12.5Mn-2.OMo-1.15C Hadfield steel to achieve a material with high strength and resistance to plastic instability. Mechanical properties were evaluated by tensile deformation; microstructures and deformation modes were evaluated by optical or electron microscopy. Solution treated 16-18 Rockwell C hardness (HRC) material was warm rolled to a hardness of 39-53 HRC. During tensile deformation, strain hardening occurred with increasing loads and high uniform elongations to ultimate strengths equivalent to 56-57 HRC. Microstructures and deformation modes resemble those attributed to austenitic steels and other face centered cubic alloys with low to moderate stacking fault energy. Deformation was localized within grains in a orientation dependent crystallographic manner, often concentrated within bands consisting of slip and twinning. Substructures and microcracks were often restrained to grain size scale.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1993
Accession Number
ADA269321

Entities

People

  • J.f. Chinella

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Chemical Analysis
  • Chemistry
  • Crystal Structure
  • Electron Microscopy
  • Engineering
  • Hardening
  • Hardness
  • Information Processing
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Metallurgy
  • Microscopy
  • Military Research
  • Strain Hardening

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics