CREEP INVESTIGATION OF COMMERCIAL AND IMPROVED NICKEL-BASED WROUGHT SUPERALLOYS

Authors
ROSEN GI DIRNFELD SF BAMBERGER M ROSEN A PRINZ B
Citation
Gi. Rosen et al., CREEP INVESTIGATION OF COMMERCIAL AND IMPROVED NICKEL-BASED WROUGHT SUPERALLOYS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 172(1-2), 1993, pp. 15-21
Citations number
34
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
172
Issue
1-2
Year of publication
1993
Pages
15 - 21
Database
ISI
SICI code
0921-5093(1993)172:1-2<15:CIOCAI>2.0.ZU;2-C
Abstract
The following article is part of an investigation on the effect of Ta addition to Ni-based superalloys. This part deals with the creep prope rties. Two commercial alloys (Nimonic 80A and Waspaloy) and two experi mental alloys containing Ta have been studied. It was found that Ta si gnificantly improves the creep resistance only if the ageing treatment is carried out to develop fully the size and volume fraction of the g amma' precipitates. Ta addition also affects the values of Q and n, i. e. the activation energy for creep and the stress exponent.