Publication Date:
2017-04-20
Description:
The presence of line (stoichiometric) compounds in alloys of light metals greatly improves their mechanical and strength properties. The formation of Al 2 Y and Al 3 Y line compounds in a highly supercooled Al–Y melt is investigated using the phase field method and numerical modeling of the directional solidification of the melt. The main problem in the phase-field description of phase transitions in line compounds is finding the driving forces of these transitions. One of the possible ways to handle this problem is development of a thermodynamically consistent phase-field approach based on the minimization of the full Gibbs energy of the system, nonequilibrium thermodynamics and separation of diffusion processes in different phases. The resulting equations are analyzed in the equilibrium case. The model dynamics is examined numerically for the case of the one–dimensional problem of directional solidification of the Al–Y melt under isothermal condition. The ana...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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