Grain growth behavior of cryomilled INCONEL 625 powder during isothermal heat treatment

Nanocrystalline INCONEL 625 powders were fabricated via cryomilling (mechanical alloying under a liquid nitrogen environment), and their grain growth behavior during isothermal heat treatment was investigated in detail. The observation that precipitation kinetics were accelerated over those of conve...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2002, Vol.33 (1), p.125-134
Hauptverfasser:	CHUNG, Kyung H, JONGSANG LEE, RODRIGUEZ, Rodolfo, LAVERNIA, Enrique J
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Applied sciences Chemical precipitation Cross-disciplinary physics: materials science rheology Exact sciences and technology Grain boundaries Grain growth Grain size Heat treating Heat treatment Kinetics Liquid nitrogen Materials science Materials synthesis materials processing Mechanical alloying Metallurgy Metals Metals. Metallurgy Nanocrystals Nickel base alloys Niobium carbide Nucleation Physics Pinning Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation Precipitates Qualitative analysis Stability Superalloys
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Zusammenfassung:	Nanocrystalline INCONEL 625 powders were fabricated via cryomilling (mechanical alloying under a liquid nitrogen environment), and their grain growth behavior during isothermal heat treatment was investigated in detail. The observation that precipitation kinetics were accelerated over those of conventional INCONEL 625 was rationalized on the basis of the shortened diffusion paths and more nucleation sites available in the nanocrystalline materials.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-002-0011-y