Microstructure and plastic deformation of orthorhombic Ti2AlNb aluminides: I. Formation of polydomain structure / Kazantseva NV,Greenberg BA,Demakov SL,Popov AA,Romanov EP,Rybin VV // PHYSICS OF METALS AND METALLOGRAPHY. - 2002. - V. 93, l. 3. - P. 269-277.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

The study of orthorhombic alloys Ti-22 at. \% Al-26.6 at. \% Nb and Ti-25 at. \% Al-22 at. \% Nb after different heat treatments showed that the formation of a fine polydomain structure of an orthorhombic O phase affects their mechanical properties. The nucleation of a fine polydomain structure simultaneously increases the strength and plasticity of the orthorhombic alloys. The fine polydomain structure was shown to be thermally unstable; the domain size increases (to approximate to30 nm) as the annealing temperature decreases to 500degreesC. This is accompanied by a deterioration of strength and plasticity. The morphology and the rate of the alpha(2) --> O transformation were studied as a function of the alloy composition, and the effects of aluminum and niobium content on the phase composition and mechanical properties of the alloys were determined. The aluminum content was found to affect the formation of the fine polydomain structure responsible for the strengthening of the orthorhombic O-phase, and an increase in the niobium content promotes the retention of the beta(0) phase, thus increasing the plasticity of the alloy. An orthorhombic phase of a variable composition was observed in the structure of the alloys. No disordered beta(0) phase was observed after annealing at 700degreesC for 110 h.

Author keywords:

AL-NB SYSTEM; PHASE-TRANSFORMATIONS; SECTION; ALLOYS

DOI:

нет данных

Web of Science ID:

ISI:000175089400012

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Publisher	INTERPERIODICA
Address	PO BOX 1831, BIRMINGHAM, AL 35201-1831 USA
Language	English
Keywords-Plus	AL-NB SYSTEM; PHASE-TRANSFORMATIONS; SECTION; ALLOYS
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
ResearcherID-Numbers	Kazantseva, Nataliya/I-7647-2013 Romanov, Evgeniy/K-4224-2013 Greenberg, Bella/K-6538-2013 Popov, Artemiy/G-3947-2016
ORCID-Numbers	Kazantseva, Nataliya/0000-0002-4143-1064 Romanov, Evgeniy/0000-0002-0031-374X Greenberg, Bella/0000-0002-4803-5750 Popov, Artemiy/0000-0001-6171-1701
Number-of-Cited-References	19
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	3
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	543EX