An oxide dispersion strengthened Ni-W-Al alloy with superior high temperature strengthOxide dispersion strengthened alloys based on the WAZ-20 nickel-base alloy were prepared by the mechanical alloying process described by Benjamin (1973), and evaluated. The results of microstructural examinations and mechanical property determinations are discussed. It is shown that WAZ-20, a high gamma-prime fraction alloy having a high gamma-prime solvus temperature, can be effectively dispersion strengthened. The strengths obtained were outstanding, especially at 1150 and 1205 C. The strength is attributed to a combination of highly alloyed matrix, elongated grain structure, and hard phase dispersion. Tensile ductility can be improved by post-recrystallization heat treatment. The new alloy shows some potential for low stress post-extrusion forming.
Document ID
19770045499
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Glasgow, T. K. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Metallic Materials
Meeting Information
Meeting: International Symposium on Superalloys: Metallurgy and manufacture