Publication Type
Conference Paper
Book Title
Proceedings CD of NACE Corrosion 2007
Publication Date
Page Number
07470
Conference Name
NACE Corrosion 2007
Conference Location
Nashville, Tennessee, United States of America
Conference Sponsor
NACE International
Conference Date
-
Abstract
The oxidation behavior of specimens containing tungsten inert gas welds of UNS N06025 (NiCrFeAlY) was investigated in air for up to 5,000h at 900�-1000�C and 1,000h at 1100�-1200�C. In general, the microstructure was very homogeneous in the weld with smaller carbides and the Al2O3 penetrations were similar or smaller compared to those formed in the base metal. Above 1000�C, significant spallation was observed and Al and Cr depletion in the metal was observed to a similar extent in the weld and base metal. The maximum internal oxidation depth of the base metal at 900� and 1100�C was lower than several other commercial Ni-base alloys.
