SOLIDIFICATION OF IRON BASE ALLOYS AT LARGE DEGREES OF UNDERCOOLING.

Abstract

Dendrite morphology and grain size were studied in bulk samples of iron and nickel base alloys undercooled up to 300 C. In the alloys studied, dendrite morphology gradually changes with increasing undercooling from the usual dendritic structure to a structure composed of cylindrical dendrite arms. At a critical undercooling of approximately 170 C in these alloys there is an abrupt transition to a fine grained structure of spherical morphology.

Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1966
Accession Number
AD0654769

Entities

People

  • Merton C. Flemings
  • T. Z. Kattamis

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Dendritic Structure
  • Grain Size
  • Phase Transformations
  • Solidification
  • Supercooling
  • Transitions

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Metallurgy