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Modelling of grain refinement driven by negative grain boundary energy

SYSNO ASEP	0476921
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Modelling of grain refinement driven by negative grain boundary energy
Author(s)	Fischer, F. D. (AT) Zickler, G. A. (AT) Svoboda, Jiří (UFM-A)_{RID, ORCID}
Number of authors	3
Source Title	Philosophical Magazine. - : Taylor & Francis - ISSN 1478-6435 Roč. 97, č. 23 (2017), s. 1963-1977
Number of pages	15 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	grain refinement ; grain nucleation ; distribution concept ; jump on distribution function
Subject RIV	BJ - Thermodynamics
OECD category	Thermodynamics
R&D Projects	GA15-06390S GA ČR - Czech Science Foundation (CSF)
Institutional support	UFM-A - RVO:68081723
UT WOS	000404063900002
EID SCOPUS	85021355526
DOI	10.1080/14786435.2017.1322728
Annotation	Grain refinement can be described by the classical kinetic equation using a negative value of the specific grain boundary Gibbs energy. A respective overview is offered reporting according observations and simulations, particularly linked to grain boundary segregation. Classical grain growth model is used in the treatment of evolution of the distribution function during refinement. The adapted model requires defining nucleation rate of new grains, which significantly influences the kinetics of the system of grains. Moreover, a jump in the distribution function is allowed at a certain value of the grain radius R-J, which separates old grains from newly nucleated ones. Evolution equation for both the critical radius R-c and separation radius R-J (jump position) as well as for the dimension-free distribution (shape) function are derived. Illustrative examples for the evolution of the system parameters under various nucleation rates of newly generated grains are presented.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2018

Number of the records: 1