SYMPOSIA PAPER Published: 01 January 1978
STP25601S

Auger Electron Spectroscopy Tensile Fracture Study of Nickel Alloys

Source

An elevated temperature tensile fracture device has been built for in situ Auger electron spectroscopy studies that permits characterization of grain boundary chemistry of high-temperature structural materials. The system has been applied to a series of commercial nickel-base superalloys doped with impurities known to have deleterious effects on the mechanical properties. Clear grain boundary segregation of the elements bismuth, tellurium, lead, and sulfur has been observed confirming that the elements most harmful to the mechanical properties of superalloys are also those that are grain boundary active. The additive hafnium was found to be effective in restricting the grain boundary segregation of sulfur by combining with sulfur to form a stable carbosulfide compound.

Author Information

Walsh, JM
Materials Engineering and Research Laboratory, Pratt & Whitney Aircraft, Middletown, Conn
Gumz, KP
Materials Engineering and Research Laboratory, Pratt & Whitney Aircraft, Middletown, Conn
Anderson, NP
Materials Engineering and Research Laboratory, Pratt & Whitney Aircraft, Middletown, Conn
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E42
Pages: 72–82
DOI: 10.1520/STP25601S
ISBN-EB: 978-0-8031-4715-7
ISBN-13: 978-0-8031-0543-0