The effect of chromium on the solubility limits of the [gamma][prime]-forming elements in a Ni-Fe-Cr base superalloy

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90583-5· OSTI ID:7157287

Kalogeridis, A; Kolbe, M; Nembach, E ^[1]

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1. Univ. Muenster (Germany). Inst. fuer Metallforschung

The belief that chromium lowers the solubility limit of the [gamma][prime]-forming elements in the matrices of nickel-base superalloys is widespread among materials scientists. The main constituents of the [gamma][prime]-precipitates are nickel, aluminum and titanium. This idea also afford an explanation for the occurrence of [gamma][prime]-free zones along grain boundaries in superalloys: (1) chromium precipitates as carbide in the grain boundaries; and (2) the ensuing chromium depletion in seams along the grain boundaries raises the solubility of the [gamma][prime]-forming elements and thus suppresses the formation of [gamma][prime]-precipitates. Ternary and quaternary phase diagrams published by Taylor and Floyd lent some support to the mentioned belief. The doubt shed on it by Tien and Gamble did not receive the attention it deserved. Below the results of an experimental investigation into the effect of chromium additions on the solubility limits of the [gamma][prime]-forming elements in a commercial nickel-base superalloy are reported.

• OSTI ID: 7157287
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:9; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CHROMIUM
CHROMIUM ALLOYS
DATA
DIAGRAMS
ELEMENTS
EXPERIMENTAL DATA
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INFORMATION
IRON ALLOYS
MATERIALS
METALLURGICAL EFFECTS
METALS
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
PHASE DIAGRAMS
PHASE STUDIES
TRANSITION ELEMENTS