Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27230
Title: Microstructure evolution during warm working of Ti-5Al-5Mo-5V-1Cr-1Fe at 600 and 800°C
Authors: Zherebtsov, S. V.
Murzinova, M. A.
Klimova, M. V.
Salishchev, G. A.
Popov, A. A.
Semiatin, S. L.
Issue Date: 2013
Citation: Microstructure evolution during warm working of Ti-5Al-5Mo-5V-1Cr-1Fe at 600 and 800°C / S. V. Zherebtsov, M. A. Murzinova, M. V. Klimova [et al.] // Materials Science and Engineering A. — 2013. — Vol. 563. — P. 168-176.
Abstract: Microstructure evolution during compression to the true height strain 0.29, 0.69, or 1.2 at 600 and 800. °C of the Β-rich titanium alloy Ti-5Al-5Mo-5V-1Cr-1Fe (VT22) with an initial lamellar microstructure was established using scanning and transmission electron microscopy. It was found that microstructure evolution at both temperatures was controlled primarily by substructure evolution within the Β phase. At 800. °C, extensive recovery within the Β phase resulted in the formation of a stable structure comprising subgrains ~1.5. μm in diameter. During deformation at this temperature, lamellae of the α phase fragmented via a boundary-grooving mechanism. Due to the sluggish diffusion kinetics, however, spheroidization at 800. °C was incomplete. At the lower processing temperature, recovery processes within the Β phase were much slower, leading to greater refinement of the Β matrix. The decomposition of the metastable Β phase during warm working, gave rise to very fine α-lath precipitates, which resulted in the formation of an ultrafine microstructure with a grain size of 0.5. μm. © 2012 Elsevier B.V.
Keywords: MICROSTRUCTURE REFINEMENT
PRECIPITATION
SPEROIDIZATION
THERMOMECHANICAL PROCESSING
TITANIUM ALLOYS
DIFFUSION KINETICS
GRAIN SIZE
LAMELLAR MICROSTRUCTURE
MICROSTRUCTURE EVOLUTIONS
MICROSTRUCTURE REFINEMENT
PROCESSING TEMPERATURE
RECOVERY PROCESS
SCANNING AND TRANSMISSION ELECTRON MICROSCOPY
SPEROIDIZATION
SPHEROIDIZATION
STABLE STRUCTURES
SUBGRAINS
SUBSTRUCTURE EVOLUTION
THERMO-MECHANICAL PROCESSING
TRUE HEIGHT
ULTRA-FINE MICROSTRUCTURES
WARM WORKING
ALUMINUM
PRECIPITATION (CHEMICAL)
TITANIUM ALLOYS
TRANSMISSION ELECTRON MICROSCOPY
MICROSTRUCTURE
URI: http://hdl.handle.net/10995/27230
SCOPUS ID: 84870835790
WOS ID: 000315063000024
PURE ID: 907207
ISSN: 0921-5093
DOI: 10.1016/j.msea.2012.11.042
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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