EFFECT OF GRAIN REFINEMENT ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 434OM

Abstract

A new grain refinement technique involving grain boundary pinning by deformation voids has been investigated in 434OM steel. Significant grain refinement is observed in deformed specimens at all temperatures between Ac1 and 50F above Ac3. In a narrow temperature region just above Ac3, grain refinement produces an increase in strength and toughness but no increase in stress- corrosion threshold. It is concluded that to take full advantage of the new grain refinement process, compositional modifications of 434OM type steels are required.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0709045

Entities

People

  • Donald Webster

Organizations

  • Boeing Commercial Airplanes

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Alloys
  • Austenite
  • Corrosion
  • Electron Microscopes
  • Grain Boundaries
  • Grain Growth
  • Grain Size
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Microscopes
  • Scanning Electron Microscopes
  • Steel
  • Stress Corrosion
  • Stresses
  • Toughness

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Metallurgy
  • Public Financial Management and Budgeting