Author:
Schneibel J. H.,Porter W. D.
Abstract
Coble creep, which is controlled by mass transport along grain boundaries, has been identified in a powder-metallurgically prepared nickel aluminide with the nominal composition Ni–22.8Al–0.6Hf–0.1B (at. %). Diffusional creep rates∊as a function of temperatureT, stressσ, and grain sizeLare well described by∊ = 33δbDbΩσ(kTL3), whereδbDb= 3 × 10−6m3s−1× exp [– (313 kJ/mol)/(RT) (δbis the diffusional grain boundary width,Dbis the grain boundary diffusivity,Ris the gas constant, andTis the absolute temperature). The activation energy of 313 kJ/mol is unusually high as compared to that for volume diffusion.
Publisher
Springer Science and Business Media LLC
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference14 articles.
1. 14 Hoshino K. , Rothman S. J. , and Averback R. S. , Acta Metall. (to be published).
2. 13 Schneibel J. H. and Martinez L. , in Ref. 2, p. 297.
3. Diffusional creep and diffusionally accommodated grain rearrangement
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1. References;Fundamentals of Creep in Metals and Alloys;2015
2. References;Fundamentals of Creep in Metals and Alloys;2008
3. References;Fundamentals of Creep in Metals and Alloys;2004
4. Creep behavior of dispersion-strengthened Ni3Al intermetallic processed using reactive atomization and deposition;Scripta Metallurgica et Materialia;1995-04
5. Creep of a niobium beryllide, Nb2Be17;Journal of Materials Research;1993-04