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1 Mandziej S.T.

1 1998

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Physical simulation of metallurgical processes.

Mandziej S.T.

Inżynieria Materiałowa

1998

R. XIX, nr 4

659-666

Physical simulation is a way to gain data of materials behaviour characterizing a real process or application, which data can then be used for control of a particular metal working process or for computer simulation. Some 50 years ago the physical simulation was at first applied to study welding process, and recently it has been widely used for a wide variety of processes and applications like continuous casting, hot rolling and forging, thermomechanical treatment, and other. An example related to welding application, is the microfissuring which occurs in multi-bead welds of superalloys. In top layers of the welds fine reheat cracks of liquation or ductility-dip type nucleate in characteristic locations of interbead heat-affected zones. The simulation based on a micromechanism of the microfissures' formation, allows to measure critical strains to fracture during exactly reproduced welding thermal cycles. Hot shortness which frequently occurs during rolling of as-cast metal alloys, can be studied by strain induced crack opening procedure - SICO. Simulating the corner cracking of hot rolled billets, the SICO method allows to gain flow stress data, and measure strains to fracture, at exact strain rates, deformation temperatures, and at correctly reproduced thermal gradients of the real process.