The alloy CMSX-4 has been developed for turbine blades and other details working in the hot gas environment in aircraft jet engines. It was designed with the aim of approaching optimal castability, strength, fatigue and corrosion properties. It is a second generation single crystal duplex alloy with 3 wt% of Re for operation at temperatures typically of around 1140 deg C. Permeation of hydrogen in CMSX-4 superalloy single crystals was studied by the volumetric method in the temperature interval from 573 to 1173 K. The measurements were carried out with two purity grades of hydrogen and for various sample thicknesses to estimate the influence of surface effects upon the permeation rate. The effect of phase transformation in the gamma' particles upon permeation rate was detected.
Permeation of hydrogen in Ni-based superalloy CMSX-4
Wasserstoffpermeabilität in einer Ni-Basis-Superlegierung CMSX-4
Acta Materialia ; 48 , 4 ; 827-833
2000
7 Seiten, 11 Bilder, 1 Tabelle, 17 Quellen
Aufsatz (Zeitschrift)
Englisch
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