Thermodynamically calculated isothermal sections of the Fe-Ni-Cr ternary system for temperatures above 1023 K

Technical Report · Fri Apr 03 04:00:00 EST 1987

OSTI ID:6617824

Elmer, J W

Twenty-one isothermal sections of the Fe-Ni-Cr ternary system were thermodynamically calculated between 1873 and 1023 K using computational software. Results represent the liquidus surface, solidus surface, and the austenite + ferrite two-phase solvus surfaces. Sigma phase, which occurs at temperatures below 1223 K, was not included as part of this investigation. Tie-lines were generated in all of the two-phase regions to predict segregation during solidification and partitioning during the ferrite-to-austenite transformation. The thermodynamic calculations correlate well with the existing experimental data for binary and ternary invariant points, phase-field locations, and tie-lines in the two-phase fields. This investigation helped to clarify conflicting information about the segregration of chromium during primary ferrite solidification by showing that chromium segregates to the liquid for alloys containing less than 16% Cr and to the ferrite for alloys containing more than 16% Cr.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6617824
• Report Number(s): UCID-20838; ON: DE87009097
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
CARBON ADDITIONS
CHROMIUM
CHROMIUM ALLOYS
DIAGRAMS
ELEMENTS
FERRITE
IRON ALLOYS
METALS
NICKEL ALLOYS
PHASE DIAGRAMS
SEGREGATION
TERNARY ALLOY SYSTEMS
THERMODYNAMICS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE