A directionally solidified iron--chromium aluminum--tantalum carbide eutectic alloy. [Fe--13. 6 Cr--3. 7Al--9TaC]

Technical Report · Tue Mar 01 04:00:00 EST 1977

OSTI ID:7087702

Harf, F H

A eutectic alloy, Fe--13.6Cr--3.7Al+9TaC, was directionally solidified in a high gradient furnace, producing a microstructure of aligned TaC fibers in an oxidation resistant alpha-iron matrix. Tensile and stress rupture properties, thermal cycling resistance, and microstructures were evaluated. The alloy displays at 1000 C an ultimate tensile strength of 58 MPa and a 100-hour rupture life at a stress of 21 MPa. Thermal cycling to 1100 C induces faceting in the TaC fibers. Tensile and stress rupture tests of directionally solidified, as cast, and oxide dispersion strengthened alloys were conducted; variables included nominal composition (wt %), temperature, ultimate tensile strength, yield strength, elongation, solidification rate, stress, life. figure, 2 tables.

• Research Organization: National Aeronautics and Space Administration, Cleveland, Ohio (USA). Lewis Research Center
• OSTI ID: 7087702
• Report Number(s): N-77-19208; NASA-TM-X-3434; E-8890
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
EUTECTICS
FABRICATION
FAILURES
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
RUPTURES
TANTALUM CARBIDES
TANTALUM COMPOUNDS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE