WIT Press


Fatigue Damage Process In M-Cr-Al-Y Alloy Protective Coatings At High Temperatures

Price

Free (open access)

Paper DOI

10.2495/LD960221

Volume

13

Pages

11

Published

1996

Size

1,177 kb

Author(s)

T. Sadasue, M. Okazaki, Y. Mutoh, Yltoh & M. Saitolf

Abstract

The fatigue fracture of the Ni-base superalloy, IN 738LC, coated with the so-called M-Cr-Al-Y alloys by low pressure plasma spraying was studied at high temperature in vacuum condition. Most of the protective coatings exhibited the fatigue strength comparable to the IN 738LC substrate, when the fatigue fracture was controlled by the propagation of the fatigue crack which initiated from the casting defects in the superalloy substrate. However, when the fatigue crack initiation occurred from the coated layer, the fatigue strength of the coatings was significantly reduced depending on the M-Cr-Al-Y alloy systems, compared with that of t

Keywords