Metal matrix composites for high temperature turbine blades. Final technical report, 1 Feb 1974-1 Feb 1975

Technical Report · Mon Mar 31 04:00:00 EDT 1975

OSTI ID:7290417

Brentnall, W D; Moracz, D J; Toth, I J

Continued development and evaluation of fiber-reinforced FeCrAlY composites, intended for gas turbine engine application at temperatures above 2000/sup 0/F, is described. Resistance of W--1ThO/sub 2//FeCrAlY and Mo--TZM/FeCrAlY composites to thermal cycling over the temperature ranges 85 to 2000/sup 0/F was determined. The W--1ThO/sub 2/-reinforced system sustained 1000 cycles at the higher peak temperature cycle without damage. Mo--TZM/FeCrAlY composites sustained 1000 cycles of T/sub max/ = 2000/sup 0/F and 100 cycles T/sub max/ = 2200/sup 0/F without damage but failed in the 1000 cycle T/sub max/ = 2200/sup 0/F test. Times-to-rupture of over 300 h at 2100/sup 0/F and 35 ksi were observed for W--1ThO/sub 2//FeArCrAlY composites at the 40 to 45 vol percent reinforcement. On a specific strength (density normalized) basis, these data represent substantial strength improvements over current D. S. eutectic systems. Additionally, relatively low creep strains were observed for the W/FeCrAlY system compared to other candidate materials.

• Research Organization: TRW, Inc., Cleveland, Ohio (USA)
• OSTI ID: 7290417
• Report Number(s): AD/A-009298; TRW-ER-7722-F
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ACTINIDE COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
CHALCOGENIDES
CHROMIUM ALLOYS
COMPOSITE MATERIALS
CREEP
ELEMENTS
FRACTURE PROPERTIES
HIGH TEMPERATURE
IRON ALLOYS
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
METALS
MOLYBDENUM
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METALS
THERMAL CYCLING
THORIUM COMPOUNDS
THORIUM OXIDES
TRANSITION ELEMENTS
TUNGSTEN
TURBINE BLADES
VERY HIGH TEMPERATURE
YTTRIUM ALLOYS