OXIDATION BEHAVIOR OF WELDED AND BASE METAL UNS N06025

Conference · Mon Jan 01 00:00:00 EST 2007

OSTI ID:931294

Pint, Bruce A ^[1]; Paul, Larry D. ^[2]

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1. ORNL
2. Thyssen-Krupp VDM

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Temperature Materials Lab. (HTML)
• Sponsoring Organization: USDOE Office of Science (SC); Work for Others (WFO)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 931294
• Resource Relation: Conference: NACE Corrosion 2007, Nashville, TN, USA, 20070313, 20070317
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL BASE ALLOYS
WELDED JOINTS
MICROSTRUCTURE
OXIDATION
CHROMIUM ALLOYS
IRON ALLOYS
ALUMINIUM ALLOYS
YTTRIUM ALLOYS
Oxidation
Weld
NiCrFeAlY
EPMA
Internal Oxidation