Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidification
نویسندگان
چکیده
منابع مشابه
Effects of flow on morphological stability during directional solidification
Research involving the interaction of flow with morphological instability during directional solidification of binary alloys is reviewed. In general, flow may arise during the solidification process from thermal and solutal buoyancy, changes in density upon solidification, thermocapillary forces at free boundaries, or external forcing of the system. We focus primarily on the last of these, givi...
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A two-dimensional phase-field method was developed that allowed us to observe the evolution of the composition field and the microstructure of lamellar eutectics caused by variations in the freezing rate. Solid-phase nucleation, lamella termination, and migration of the three-phase junction were studied to elucidate the role of each in microstructure changes. This evolution is often complex due...
متن کاملTransport processes in directional solidification and their effects on microstructure development
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متن کاملDirectional Solidification Microstructure of a Ni-Based Superalloy: Influence of a Weak Transverse Magnetic Field
A Ni-based superalloy CMSX-6 was directionally solidified at various drawing speeds (5–20 μm·s−1) and diameters (4 mm, 12 mm) under a 0.5 T weak transverse magnetic field. The results show that the application of a weak transverse magnetic field significantly modified the solidification microstructure. It was found that if the drawing speed was lower than 10 μm·s−1, the magnetic field caused ex...
متن کاملThree dimensional thermal-solute phase field simulation of binary alloy solidification
Article history: Received 8 September 2014 Received in revised form 20 January 2015 Accepted 28 January 2015 Available online 3 February 2015
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ژورنال
عنوان ژورنال: Acta Materialia
سال: 2018
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2018.03.012