Phase analysis of iron rich superalloys within the multicomponent system Fe-Mn-Cr-Mo-(Nb)-Al-Si-C

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6634418

Gupta, H K

This investigation deals with developing low cost in Fe-base superalloys with duplex microstructure, in which M/sub 7/C/sub 3/ carbide fibers reinforced the ..gamma..-Fe matrix. These alloys are sought to be substitutes for currently existing Ni- and Co-base superalloys for high temperature applications. To accomplish this, a systematic study of Fe-base ternary Fe-Mo-C, quaternary Fe-Al-Si-C, quinaries Fe-Mn-Al-Si-C and Fe-Cr-Al-Si-C, six component Fe-Mn-Cr-Al-Si-C, and eight component Fe-Mn-Cr-Mo-(Nb)-Al-Si-C systems was carried out, and respective phase diagrams were established. It was demonstrated that an alloy with nominal composition bal. Fe, 15 wt% Mn, 15 wt% Cr, 2 wt%Mo, 1 wt% Nb, 1 wt% Si, and 1.5 wt% C, after directional solidification, meets all the requirements to substitute conventional Ni- and Co-base superalloys. Since exploration of multicomponent systems and their phase diagrams are of general interest and pertinent to advanced materials development, a novel method to construct phase diagrams of multicomponent systems by overlapping ZPF lines is proposed.

• Research Organization: Connecticut Univ., Storrs (USA)
• OSTI ID: 6634418
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
CHROMIUM ALLOYS
DIAGRAMS
FIBERS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MATERIAL SUBSTITUTION
MATERIALS
MOLYBDENUM ALLOYS
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
PHASE DIAGRAMS
REINFORCED MATERIALS
SILICON ADDITIONS
SILICON ALLOYS