Modeling nonisothermal laser amorphization: a multicomponent alloy perspective

The processes of melt crystallization and conductive heat transfer during selective laser melting of a metal alloy are considered in a conjugate formulation. A mathematical model is proposed for describing the inhomogeneous temperature field for calculating the fraction of the crystalline phase duri...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2024-02, Vol.130 (11-12), p.5795-5812
Main Authors: Kovalev, Oleg B., Gusarov, Andrey V., Ivanenko, Daniil S.
Format: Article
Language:English
Subjects:
Amorphization
Amorphous alloys
Amorphous materials
CAE) and Design
Computer-Aided Engineering (CAD
Conductive heat transfer
Crystallization
Engineering
Homogeneity
Industrial and Production Engineering
Laser applications
Laser beam melting
Lasers
Mathematical models
Mechanical Engineering
Media Management
Melt pools
Metallic glasses
Original Article
Qualitative analysis
Surface layers
Temperature distribution
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Summary:The processes of melt crystallization and conductive heat transfer during selective laser melting of a metal alloy are considered in a conjugate formulation. A mathematical model is proposed for describing the inhomogeneous temperature field for calculating the fraction of the crystalline phase during laser treatment of the surface of a metal alloy. A numerical study of laser amorphization of bulk metallic glass (BMG) by melting the surface of samples of finite dimensions has been carried out. A comparison with the known experimental data is carried out, and a qualitative agreement is obtained for the calculations on the depth of the melt pool, the homogeneity of the amorphous layer, and its location for a multicomponent alloy based on zirconium: Zr 57 Cu 15 , 4 Ni 12 , 6 Al 10 Nb 5 . Potentially suitable laser scanning regimes are identified, in which the fraction of the crystalline phase in the treated layer does not increase compared to the initial one in the initial amorphous-crystalline alloy. It was found that when using the calculated modes of laser scanning, it is possible to reduce the fraction of the crystalline phase in the treated surface layer of the BMG alloy by orders of magnitude.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-024-13025-9